Study of Charmonium(-like) States via ISR at Belle

小学上册英语第四单元真题(含答案)英语试题一、综合题(本题有100小题，每小题1分，共100分.每小题不选、错误，均不给分)1. A pendulum swings back and ______.2.The girl is very ________.3.How many colors are there in a rainbow?A. 5B. 6C. 7D. 84.The _____ (松鼠) is gathering nuts for the winter.5.I saw a _______ (小动物) at the nature reserve.6.The _______ of an object can be tested with a balance.7.My dog enjoys a _______ (长时间) walk every day.8.Exothermic reactions release ______.9.My family has a ________ that we take care of.10.The periodic table organizes elements by their _____.11.My mom _____ breakfast every morning. (prepares)12. A mixture of two or more metals is called an ______ alloy.13.I enjoy playing ______ (团体运动) with my friends after school.14.The _______ (The Louisiana Purchase) doubled the size of the US in 1803.15.How many legs does a dog have?A. 2B. 3C. 4D. 516.My pet ______ (狗) loves to play with other pets.17.__________ (反应动力学) examines the speed and mechanisms of reactions.18.I enjoy going to the ______ (博物馆) with my family. We learn about history and see ______ (古老的东西).19.The city of Nicosia is the capital of _______.20. A wave can be described by its amplitude, wavelength, and ______.21.What is 3 + 5?A. 7B. 8C. 9D. 10答案:B22.What is the primary ingredient in a traditional gazpacho?A. TomatoesB. CucumbersC. PeppersD. All of the above23.What is the name of the fairy tale character who had a long braid?A. CinderellaB. RapunzelC. Snow WhiteD. Belle24. A ________ is a large natural area without human development.25.Which fruit is green on the outside and red on the inside?A. KiwiB. WatermelonC. GrapesD. Peach答案:B Watermelon26.The _______ (Magna Carta) was signed in 1215, limiting the power of the king.27. A _____ (环境) can change how plants grow.28. A ______ is a collection of data gathered from observations.29. A ________ (植物观察志愿者) contributes to knowledge.30.________ (草) covers the ground in many parks.31.What do we call the practice of planting trees to improve the environment?A. ReforestationB. DeforestationC. AfforestationD. Urbanization答案:A32.My friend’s birthday is in ____.33.What do you call the main character in a play?A. ActorB. DirectorC. ProtagonistD. Scriptwriter34.The rain makes everything ______ (clean) outside.35.The __________ (历史的涵养) cultivates appreciation.36.I want to ______ (learn) how to cook.37.When it rains, I like to stay __________ with a good book. (室内)38.The _____ (tangerine) tree produces citrus fruit.39.What do we drink from?A. PlateB. CupC. BowlD. Fork答案:B40.What is the first animal to go into space?A. MonkeyB. DogC. CatD. Mouse41.The __________ is a notable landmark in history.42.Distilled water is free of ______.43.The __________ is the main source of food for many animals.44.What do you call the process of taking water from the ground?A. ExtractionB. IrrigationC. DistillationD. Filtration答案:A45.The rabbit's hind legs are powerful for ______ (跳跃).46.The beach has ______ (soft) sand.47.The __________ is the center of the earth.48.In the morning, the air is very ______ (清新).49.I need to _____ (buy/sell) some groceries.50.In the morning, I brush my ________ (牙齿) and wash my ________ (脸).51.The __________ is known for its rich history and culture. (意大利)52.The _____ (动物) rely on plants for food and shelter.53.The _______ is the part of an atom that has a positive charge.54.The _____ (花园) is a peaceful retreat.55.What is the capital of Ghana?A. AccraB. KumasiC. TamaleD. Takoradi56.The ________ (农业与环境研究) are interconnected.57.What is the capital city of Italy?A. FlorenceB. RomeC. VeniceD. Milan58.I can make my own ________ (玩具) from recycled materials.59.What do we call the movement of tectonic plates?A. Continental DriftB. ErosionC. WeatheringD. Subduction60.The body part that helps us breathe is called the ______.61. A lever can help lift heavy ______.62.What do you call a story based on real events?A. FictionB. Non-fictionC. NovelD. Myth答案:B63.What do we call a person who studies plants?A. BotanistB. ZoologistC. GeologistD. Ecologist64.I have a ___ (feeling) it's going to rain.65.The ______ has a strong family bond.66.I love to explore ______ with my friends.67.The teacher is _____ (kind/mean).68.What is the largest ocean on Earth?A. Atlantic OceanB. Arctic OceanC. Indian OceanD. Pacific Ocean答案:D69.The first president of the United States was ________ (乔治·华盛顿).70.What is the capital of Spain?A. MadridB. BarcelonaC. ValenciaD. Seville答案:A71.The chemical symbol for gallium is _____.72.Which insect produces honey?A. AntB. ButterflyC. BeeD. Mosquito答案:C73.My sister enjoys __________ (舞蹈) classes after school.74.Certain plants can ______ (影响) local culture significantly.75.The ____ has large eyes and can see well in the dark.76.What do astronauts wear to protect themselves in space?A. PajamasB. Space suitsC. RaincoatsD. Regular clothes77.The _______ (The fall of the Berlin Wall) symbolized the end of the Cold War.78.The historian writes about important _____ (事件).79.What do you call a person who studies the weather?A. MeteorologistB. ClimatologistC. GeologistD. Hydrologist答案:A80.The finch is a small _______ (鸟) that sings beautifully.81.What do you call a feeling of great happiness?A. SadnessB. JoyC. AngerD. Fear答案:B82.The ________ is full of tiny seeds.83.The sun is very ________ today.84.Ancient Egyptians believed in many ________.85.What is the capital city of Russia?A. MoscowB. St. PetersburgC. KievD. Minsk答案:A86.What is the main ingredient in chocolate?A. CocoaB. SugarC. MilkD. Flour答案:A87. A _____ occurs when the moon is fully illuminated.88.What is the name of the bright star that marks the North Star?A. SiriusB. PolarisC. VegaD. Betelgeuse89.The _____ (铁路) connects cities.90.The capital of Haiti is __________.91.What is the name of the famous ancient city in Peru?A. CuscoB. Machu PicchuC. NazcaD. Arequipa答案:B Machu Picchu92.When it snows, everything looks __________. (洁白的)93.We are ___ the park. (visiting)94.My favorite game on my tablet is about ________ (建设城市). I can build parks and ________ (商店).95.The capital of Brazil is _______.96.Many plants produce ______ (种子) in the fall.97.She is wearing a ______ (dress).98.What is the main ingredient in yogurt?A. MilkB. SugarC. WaterD. Cream答案:A99.What is the season after spring?A. WinterB. SummerC. FallD. Autumn答案:B100.What is the name of the famous British author known for "Harry Potter"?A. J.K. RowlingB. Philip PullmanC. C.S. LewisD. Roald Dahl答案:A。

a r X i v :0712.2233v 1 [h e p -e x ] 13 D e c 2007Frascati Physics Series Vol.XL VI (2007),pp.000-000HADRON07:XII Int.Conf.on Hadron Spectroscopy –Frascati,October 8-13,2007Parallel Session Charmonium spectroscopy at B A B A R Arafat Gabareen Mokhtar Dept.of Physics Colorado State University Fort Collins,CO 80523USA for the B A B A R Collaboration Abstract The charmonium-like states,Y (4260),Y (4350),produced via initial state radiation,as well as the X (3872),and Y (3940),produced in B meson decays from the B A B A R B-factory are reviewed.These mesons do not seem consistent with conventional charmonium models,and several alternate hypotheses have been proposed to explain these new discoveries.1IntroductionSeveral charmonium-like states have been discovered recently at the BELLE and B A B A R B -factories.These new states have been observed in e +e −ini-tial state radiation (ISR)interactions or in B -decays.The relevant Feynman diagrams representing ISR production and B -decay are shown in Fig.1.In ISR events,a real photon is emitted from the incoming electron or positronand subsequently the electron and positron annihilate to yield a virtual photon (γ⋆)which couples to a c¯c system with c.m.energy lower than the nominal value,and thus charmonia can be produced.In¯B-decay,a W−from the b-quark yields an s¯c system;the¯c combines with the c quark from b decay to produce a charmonium state,while the s quark and¯q spectator yield a strange meson.Figure1:Feynman diagrams representing charmonium production via a)ISR, b)¯B decay.The discovery of the charmonium-like state X(3872)→J/ψπ+π−was re-ported by the BELLE collaboration1),and confirmed by the CDF2),D03), and B A B A R4)experiments.Since then several charmonium-like states have been discovered at the B-factories,however they do not seem consistent with conventional charmonium spectroscopy.Alternative explanations for these states have been proposed,such as molecules,4-quark states,hybrids,etc.In this report,we review briefly the latest results from the B A B A R ex-periment concerning four of these charmonium-like states.2The Y(4260)The Y(4260)→J/ψπ+π−was discovered by B A B A R in the ISR reaction e+e−→γISR J/ψπ+π−5)using233fb−1of data,where detection of the ISR photon was not required.The J/ψπ+π−mass distribution is shown in Fig.2,where in the sub-figure a broader mass region shows the peak due toψ(2S )→J/ψπ+π−;an enhancement is observed at ∼4.26GeV/c 2.The mass region 3.8<m J/ψπ+π−<5GeV/c 2is fitted with a Breit-Wigner signal func-tion and a second order polynomial background.The background from J/ψside-band does not show any peaking structure.The number of signal eventsextracted from the fit is 125±23,the mass is M Y =4259±8+2−6MeV/c 2,and the width is ΓY =88±23+6−4MeV.The branching fraction obtained isΓY,ee ∗BF (Y (4260)→J/ψπ+π−)=5.5±1.0+0.8−0.7eV.At B A B AR ,no evidence was found for the processes Y (4260)→φπ+π−6),Y (4260)→D ¯D7),and Y (4260)→p ¯p 8).A search for the Y (4260)resonance in B decay was carried out,and a 3σeffect was observed 9).Figure 2:The J/ψπ+π−invariant mass distribution in the range 3.8−5.0GeV/c 2.The dots represent the data,the filled histogram shows the background from the J/ψside-bands,the solid curve represents the fit result and the dashed line shows the background.3The Y (4350)In B A B A R ,a search for Y (4260)→ψ(2S )π+π−yielded instead evidence for a broad structure near ∼4.3GeV/c 210).This enhancement is not consistentwith the Y (4260)state.InFig.3,the 2(π+π−)J/ψinvariant mass is shown for the data (dots)and for the background (shaded histogram).The data points are fitted with a Breit-Wigner signal function with fixed mass and width 5)(dashed line),and again with mass and width as free parameters.The latter fit yields mass m =4324±23MeV/c 2,and width Γ=172±33MeV (statistical errors only).The Y (4350)was confirmed by BELLE 11).Figure 3:The 2(π+π−)J/ψinvariant mass spectrum.The dots indicate the data and the shaded histogram represents the background.The solid curve shows the fit result with free mass and width parameters,while the dashed curve is obtained with the mass and width fixed to their Y (4260)values 5).4The X (3872)The X (3872)discovered by BELLE 1)was the first of the new charmonium-like ter CDF 2),D03),and B A B A R 4)confirmed the BELLE observation.In B A B A R ,a data sample of 211fb −1was analyzed to obtain the J/ψπ+π−invariant mass in the region 3.8−3.95GeV/c 2separately for charged and neutral B -candidates as shown in Fig.4.The dots represent the data and the shaded histograms represent background.For charged B decay (Fig.4(a)),a clear enhancement is observed for m J/ψπ+π−∼3870GeV/c 2.Statistically consistent behavior is observed for the neutral mode (Fig.4(b)).The X (3872)invariant mass obtained from the charged (neutral)B -mode is m =3871.3±0.6±0.1(3868.6±1.2±0.2)MeV/c 2,and the corresponding branching fraction values are BF (B −→X (J/ψπ+π−)K −)=(10.1±2.5±1.0)×10−5and B (B 0→X (J/ψπ+π−)K 0)=(5.1±2.8±0.7)×10−5at 90%C.L.Figure 4:The J/ψπ+π−invariant mass distributions for charged (a)and neu-tral (b)B decay from B A B A R .The dots represent the data,while the shaded histograms represent side-band background.The solid curves show the fit re-sults,the dashed lines show combinatorial background,and the dotted lines represent the sum of combinatorial and peaking background contributions.In B A B A R ,no evidence for a charged partner of the X (3872)was found 12),and so it is assumed that the X (3872)has I =0.Also B A B A R 13)has con-firmed the BELLE observation 14)of X (3872)→J/ψγ.In Fig.5we show the J/ψγmass distribution obtained from B A B A R ,and a clear enhancement is ob-served at the X (3872)mass.It follows that the X (3872)has positive C -parity.Later both BELLE 15)and B A B A R 16)have found evidence for the decaymode X (3872)→¯D⋆0D 0.In Fig.6,we show the ¯D ⋆0D 0invariant mass as reported by B A B A R .A clear enhancement near threshold is observed.Themeasured mass values from BELLE and B A B A R are 3875.2±0.7+0.9−1.8MeV/c2and 3875.1+0.9−0.7±0.5MeV/c 2,respectively.The difference between the massFigure5:The number of extracted signal events versus m c¯c for the X(3872) mass region.The solid curve represents thefit result.value obtained in the¯D⋆0D0decay mode and that from PDG17)is then3.8+1.2−2.0 MeV/c2from BELLE and3.7+1.1MeV/c2from B A B A R,indicating that the−0.9effect is real.This mass difference has received a lot of attention,although a simple explanation involving one unit of orbital angular momentum(and hence J P=2−)has been proposed recently18).5The Y(3940)The Y(3940)wasfirst observed by the BELLE collaboration19)in the decay process B→J/ψωK using253fb−1of data.The mass and width obtained for this resonance were m=3943±11±13MeV/c2andΓ=87±22±26MeV. In B A B A R a data sample of348fb−1is used to search for the Y(3940)20). Charged and the neutral B-decays are analyzed separately,and in the B A B A R analysisfiner mass binning was used on the basis of mass resolution studies. Signal events were corrected for acceptance and mass resolution effects.A significant enhancement is observed near threshold in the charged mode,and a statistically-limited,but consistent,signal is obtained in the neutral mode.Figure6:The¯D⋆0D0invariant mass,where the solid curve shows thefit result and the dashed curves represent the signal and background contributions.In Fig.7we show the acceptance-corrected J/ψωmass distributions for the charged(Fig.7(a))and neutral(Fig.7(b))B decay modes,respectively.The data points arefitted with a Breit-Wigner signal function and a single Gaussian function for the non-resonant contribution.Goodfits to the data are obtained, as shown by the solid curves.The mass and width of the Y(3940)are found tobe m=3914.6+3.8−3.4(stat)+1.9−1.9(syst)MeV/c2andΓ=33+12−8(stat)+5−5(syst)MeV,respectively,with branching fractions for the charged and the neutral decaymodes BF(B+→Y K+)=(4.9+1.0−1.0(stat)+0.5−0.5(syst))×10−5,and BF(B0→Y K0)=(1.5+1.4−1.2(stat)+0.2−0.2(syst))×10−5;the latter has corresponding upperlimit(95%C.L.)3.9×10−5.6AcknowledgmentsThe B A B A R Collaboration acknowledges the extraordinary efforts of the PEPII collider group for providing the excellent luminosity.I should like to thank the Hadron07conference organizers for a nice meeting at Frascati,and also Bill Dunwoodie and Walter Toki for useful comments.Figure7:The acceptance-corrected J/ψωmass distribution for(a)B+and(b) B0decay.The solid curves represent thefit results.References1.S.-K.Choi et al.,Phys.Rev.Lett.91,262001(2003)2.D.Acosta et al.,Phys.Rev.Lett.93,072001(2004)3.V.M.Abazov et al.,Phys.Rev.Lett.93,162002(2004)4.B.Aubert et al.,Phys.Rev.D71,071103(2005)5.B.Aubert et al.,Phys.Rev.Lett.95,142001(2005)6.B.Aubert et al.,Phys.Rev.D74,091103(R)(2006)7.B.Aubert et al.,arXiv:0710.1371[hep-ex],(2007)8.B.Aubert et al.,Phys.Rev.D73,012005(2006)9.B.Aubert et al.,Phys.Rev.D73,011101(2006)10.B.Aubert et al.,Phys.Rev.Lett.98,212001(2007)11.X.L.Wang et al.,Phys.Rev.Lett.99,142002(2007)12.B.Aubert et al.,Phys.Rev.D71,031501(2005)13.B.Aubert et al.,Phys.Rev.D74,071101(2006)14.K.Abe et al.,arXiv:0505037[hep-ex],(2005)15.G.Gokhroo et al.,Phys.Rev.Lett.97,162002(2006)16.B.Aubert et al.,arXiv:0708.1565[hep-ex],(2007)17.W.-M.Yao et al.,J.Phys.G33,1(2006)18.W.Dunwoodie and V.Ziegler,arXiv:0710.5191[hep-ex],(2007)19.S.-K.Choi et al.,Phys.Rev.Lett.94,182002(2005)20.B.Aubert et al.,arXiv:0711.2047[hep-ex],(2007)。

小学上册英语第3单元测验卷英语试题一、综合题(本题有100小题，每小题1分，共100分.每小题不选、错误，均不给分)1.She is ___ her homework. (doing)2.What is the sound a cow makes?A. BarkB. MeowC. MooD. RoarC3. A catalyst is not consumed in a _______.4. A ladybug has a red ______ (外表) with black spots.5.The ancient Greeks held competitions in the ________.6.We can _______ a fun game together.7.I can ______ (适应) to new environments.8.The weather is very ___. (nice)9.What do we call the small pieces of glass used for decoration?A. MarbleB. BeadsC. GemsD. MosaicD10.The teacher is very ________.11.What do we call a person who studies history?A. HistorianB. ArchaeologistC. GeographerD. ScientistA12.The capital city of Sweden is ________.13.The city of Dhaka is the capital of _______.14.I made a scrapbook about my favorite ____. (玩具名称)15.Playing with toys helps me learn how to ________ (动词) with others. It teaches me important ________ (名词).16.The boiling point is the temperature at which a liquid ______.17.The invention of the printing press allowed for mass _____.18.The state of matter with a definite volume but no fixed shape is __________.19.The ancient Egyptians practiced ________ as part of their belief systems.20.Chemical bonds store ______ potential energy.21.The hedgehog rolls into a _________. (球)22. A neutralization reaction involves an acid and a ______.23.The __________ (历史的多元性) enrich dialogue.24.We played ________ in the playground.25.The _____ (树干) supports the branches and leaves.26.I have ______ at school.27.The __________ (古希腊的哲学) influenced Western thought.28.She is ___ a song. (singing)29. A ____ can often be seen perched on a branch singing.30.__________ are used in the textile industry for dyeing.31.My friend is very ________.32.What is the opposite of soft?A. HardB. SmoothC. RoughD. Solid33.I like to share my ____ with my friends. (玩具名称)34.She is _______ (playing) the violin beautifully.35.I enjoy ______ (摄影).36.The __________ is a famous mountain range in Asia. (喜马拉雅山)37.What do we call the area of the body that includes the head, neck, and torso?A. AppendagesB. CoreC. LimbsD. AxialD38.The hyena is known for its ________________ (笑声).39.My mom makes ______ for breakfast. (pancakes)40.What is the main ingredient in barbecue sauce?A. KetchupB. MustardC. TomatoesD. Vinegar41.What do you call a person who studies plants?A. ZoologistB. BotanistC. GeologistD. ChemistB42.The capital of Nicaragua is ________ (尼加拉瓜的首都是________).43.I have a ________ that helps me learn.44.The rabbit's ears help it hear _________. (声音)45.I have a collection of ______ (玩具) that I keep on my shelf. They remind me of my ______ (童年).46. A __________ is a factor that influences the climate.47.What is the opposite of hot?A. WarmB. ColdC. CoolD. ChillyB48.Asteroids are sometimes called ______.49.An exothermic reaction releases ______.50.We will go to the ______ for lunch. (restaurant)51.What do you call the area where you can see nature and animals?A. ParkB. GardenC. ForestD. JungleA52.What do you call the person who teaches you at school?A. DoctorB. TeacherC. ChefD. ArtistB53.They are _____ in the swimming pool. (swimming)54. A _______ change affects only the form of a substance, not its composition.55.What is the name of the tool used to measure temperature?A. BarometerB. ThermometerC. RulerD. ScaleB56.The chemical formula for glucose is __________.57.The _______ (Arab-Israeli conflict) has continued for decades.58.Which animal is known as the "king of the jungle"?A. TigerB. BearC. LionD. ElephantC59.What do you call a large area of flat land?A. PlateauB. MountainC. ValleyD. PlainD60. A _______ is a measure of how much energy is needed to change temperature.61.The chemical symbol for aluminum is _______.62.What do we call the study of the universe?A. AstronomyB. GeologyC. BiologyD. Physics63.The ______ helps with the production of saliva.64.The ________ was a major event in the history of technological advancement.65.The ______ (阳光充足的地方) is ideal for flowers.66.I have a toy _______ that dances and sings my favorite songs.67.The _______ (The French and Indian War) was part of the larger Seven Years' War.68.My favorite season is ______ (fall).69.The dog is _____ at the front door. (waiting)70.The sun is ______ (shiny) during the day.71.My sister enjoys __________ (学习) about different cultures.72.My puppy loves to snuggle on my ______ (腿).73.The sky is ___ (blue).74.My favorite season is __________ because I love __________.75.What do we call the process of plants making their food?A. PhotosynthesisB. RespirationC. DigestionD. EvaporationA76.Which is the smallest planet in our solar system?A. MarsB. MercuryC. VenusD. PlutoB Mercury77.I like to drink ______ (果汁) in the morning with my breakfast.78.The ______ (小鱼) swims gracefully in the tank.79.What do we call the process of learning new information?A. TeachingB. StudyingC. MemorizingD. EducatingB80.I love exploring technology and how it shapes our __________.81.The Earth's rotation causes day and ______ (night).82.We will go ____ to the zoo. (together/in/with)83.The Declaration of Independence was signed in _______.84.For breakfast, I usually eat ______ (面包) and drink ______ (牛奶). It gives me energy for the day.85.The gas that is produced when vinegar is heated is ______.86. A ________ (植物资源利用策略) enhances productivity.87.What do we call water in a solid state?A. LiquidB. GasC. IceD. Steam88.The chemical formula for potassium nitrate is __________.89.The _____ (树木砍伐) poses a threat to habitats.90.The backpack is _____ (heavy/light).91.The _____ of the moon affects the ocean tides.92.ohs ruled ancient ________ (埃及). The Pilg93.My ______ is a great storyteller.94.I take care of my _____ (宠物).95.I like to write ______ in my notebook.96.My dad is my strong _______ who helps me overcome challenges.97.What do you call an animal that only eats plants?A. CarnivoreB. OmnivoreC. HerbivoreD. InsectivoreC98.What is the opposite of up?A. DownB. LeftC. RightD. Forward99.What do we call the lines on a map that run north to south?A. LatitudeB. LongitudeC. EquatorD. Prime MeridianB 100.What is the name given to the study of space?A. BiologyB. PhysicsC. AstronomyD. Chemistry。

小学上册英语第2单元期末试卷英语试题一、综合题(本题有100小题，每小题1分，共100分.每小题不选、错误，均不给分)1.__________ can evaporate and leave behind a solid residue.2.How many seasons are there in a year?A. TwoB. ThreeC. FourD. Five3. A mixture that has a uniform appearance is called a ______ mixture.4.The ______ (老鼠) is afraid of cats.5. A __________ is a natural resource that can be depleted.6.She is _____ (writing) in her notebook.7.ts are ______ (肉质的) and store water. Some pla8.Which planet is known for having a "great red spot"?A. VenusB. MarsC. JupiterD. SaturnC9.What is the main language spoken in the UK?A. FrenchB. SpanishC. EnglishD. German10.The ______ creates beautiful art.11.How many letters are in the English alphabet?A. 24B. 25C. 26D. 2712.There is a __________ in the sky.13.The phone is ringing ________ (响).14.How do you say "friend" in Spanish?A. AmigoB. AmieC. FrèreD. Buddy15.I like to collect _____ from different places. (postcards)16.The fruits are fresh and ___. (juicy)17.Which animal is famous for its slow movement?A. CheetahB. SlothC. RabbitD. HorseB18.My ________ (玩具名称) is inspired by my favorite character.19.What is the opposite of fast?A. QuickB. SlowC. SpeedyD. Rapid20.The _______ (蜥蜴) can be very quick.21.I find ________ (化学) very interesting.22.I have a ________ that glows in the dark.23.This girl, ______ (这个女孩), enjoys acting in plays.24.The ________ (覆盖层) protects the soil.25.The snow is ___ (white/black).26.ocean) is home to many fish and other marine life. The ____27.I enjoy exploring nature and going on ______ (远足) with my family. We see beautiful ______ (风景) along the way.28.The ancient Greeks held the Olympic Games every __________ years. (四年)29.The ________ was a major event that shaped modern European history.30.What is the name of the famous American musician known for "Shallow"?A. Lady GagaB. Kelly ClarksonC. AdeleD. Kacey MusgravesA31.The _____ (pillow) is soft.32.What is the name of the ocean on the east coast of the USA?A. Atlantic OceanB. Pacific OceanC. Indian OceanD. Arctic OceanA33.Many _______ have different blooming seasons.34.The __________ (历史的理解过程) is essential for growth.35.The trees in the _______ provide shade in summer.36.What type of animal is a penguin?A. MammalB. BirdC. ReptileD. FishB37.What do we call the process of turning milk into cheese?A. FermentationB. CoagulationC. PasteurizationD. Homogenization38.The _______ of a plant can be green, yellow, or brown.39.My sister is learning how to ____ (swim) this summer.40.The ________ (城市发展) affects many people.41.I have a ___ (story/book) to read.42.My cat purrs when it feels _______ (放松).43.The ________ (气味) of herbs is wonderful.44. A ________ (生态平衡) ensures diversity.45.The __________ helps to create new cells in the body.46.I can ______ (唱) very well.47.The _____ (iris) blooms in various colors.48.My brother is my ________ (哥哥). We play video games together every weekend.49.The flowers are ______ in the garden.50.The ancient Greeks established many ________ (城邦).51.The ocean is _______ (闪闪发光).52.He plays _______ (video games) every weekend.53.The _______ (Silk Road) was a trade route that connected the East and West.54.Which of these is a flying mammal?A. BatB. DogC. CatD. Elephant55.What is the name of the fairy that helps Peter Pan?A. Tinker BellB. CinderellaC. BelleD. ArielA56.What do you call the process of planting seeds?A. SowingB. HarvestingC. CultivatingD. TillingA57.The part of the atom that has a negative charge is called an _______.58.What is the opposite of fat?A. ThinB. SlimC. LeanD. All of the aboveD59.I see a ___ (star/moon) shining.60.Earth has one moon, while Mars has ______.61.The cat is __________ on the sofa.62.My birthday is in ______ (七月). I want to have a big ______ (派对) with cake and ______ (气球).63.What do you call the main character in a comic book?A. HeroB. VillainC. SidekickD. Comic reliefA64.What is 15 divided by 5?A. 2B. 3C. 4D. 5B65.My grandma teaches me how to ____ (knit).66.The moon affects the ______ of the oceans.67.What is the sound of a duck?A. QuackB. MooC. WoofD. Baa68.The __________ (历史的多样性) enriches dialogue.69.What is the name of the tree that produces acorns?A. PineB. MapleC. OakD. BirchC70.We have ______ at the picnic. (sandwiches)71. A ______ is a natural feature that can influence local climates.72.What do you call a person who studies stars and planets?A. ScientistB. AstronomerC. BiologistD. GeologistB Astronomer73.The _____ (雨伞) is red.74. A turtle can hide in its ______ for protection.75. A ______ plays a key role in the habitat.76.The first successful double hand transplant was performed in _______. (2008年)77. A __________ is a narrow strip of land connecting two larger land areas. (地峡)78.What do you call a place where you can borrow books?A. SchoolB. LibraryC. ParkD. StoreB79.I want to ________ (learn) English.80.What do you call the person who helps you learn in school?A. DoctorB. TeacherC. CookD. Driver81.The ________ likes to chase after butterflies.82.I like to watch the ________ when I go outside.83.Acids taste ______ and can be sour.84.The _____ (园艺) in my backyard is my favorite place.85.The main component of antioxidants is _____.86.My dog loves to fetch a ______ (球).87.The chemical formula for acetic acid is _____.88.What is the name of the ocean on the east coast of the United States?A. AtlanticB. PacificC. IndianD. Arctic89.My sister is a ______. She likes to help others.90.The country known for kangaroos is ________ (澳大利亚).91.What is the name of the famous scientist known for his work on electromagnetism?A. James Clerk MaxwellB. Nikola TeslaC. Thomas EdisonD. Michael FaradayA92.The first successful airplane flight took place in ________.93.The movie was very ___ (interesting).94.The _____ (balloon/kite) is flying.95. A base can neutralize an ______.96.The movie was ___ (exciting/boring).97.What do you call a person who studies history?A. HistorianB. ArchaeologistC. GeographerD. Anthropologist答案:A98.The __________ (历史的持续演变) reflects societal changes.99.I think it’s important to ________ (保持积极).100.What is the name of the traditional Japanese dish made with rice and fish?A. PizzaB. SushiC. PastaD. BurgerB。

Chinese Physics C(HEP&NP)Vol.32,No.6,Jun.,2008 Study of charmonium(-like)states via ISR at Belle*YUAN Chang-Zheng( )1)(for the Belle Collaboration)(Institute of High Energy Physics,CAS,Beijing100049,China)Abstract The cross sections for e+e−→π+π−J/ψ,π+π−ψ(2S),K+K−J/ψ,D D+c.c., and D∗s= 4.26GeV and investigated16decay modes withcharmonium or light hadrons[6].The large e+e−→π+π−J/ψcross section at this energy is confirmed.Inaddition,there is also evidence for K+K−J/ψ(3.7σ)based on three events observed.Belle also measured the process e+e−→K+K−J/ψvia ISR and resonance-like structure was observed[7].The total cross section for hadron production in e+e−annihilation in the energy region above the open-charm threshold was measured by the Crystal Ball[8]and BES[9]Collaborations.However,the pa-rameters of the vector charmonium states obtained fromfits to the inclusive cross section[10,11]are poorly understood theoretically[12].Since interference be-tween different resonances depends on the specific final states,studies of exclusive cross sections for charmed meson pairs in this energy range are needed to clarify the situation.Recently,CLEO-c performed a scan over√D,D D∗fi-nal states at twelve points[14].A measurement of e+e−→DD[16],D D∗[17],and Ds=10.58GeV),and the rest were taken at a center-of-mass energy that is60MeV below theΥ(4S)peak.No.6YUAN Chang-Zheng et al Study of charmonium(-like)states via ISR at Belle453parameters solution I solution IIM(Y(4360))4361±9±9Γtot(Y(4360))74±15±10(Y(4360))10.4±1.7±1.511.8±1.8±1.4B·Γe+e−M(Y(4660))4664±11±5Γtot(Y(4660))48±15±3(Y(4660))3.0±0.9±0.37.6±1.8±0.8B·Γe+e−φ[Y(4360)and Y(4660)]39±30±22−79±17±20D,D D∗,and D∗DγISR signal events are selectedby reconstructing both the D andD=D0D system.To suppress background frome+e−→DD reconstruction.We select e+e−→D0D−π+γISR signal candidatesin which the D0,D−andπ+mesons are fully recon-structed and theγISR is not required to be detectedas for DD(n)πγISR(n>1)processes.454Chinese Physics C(HEP&NP)Vol.32D(a),D0D−π++c.c.(b),D∗+D∗−(c),and D+D∗−+c.c.(d)crosssections.The resulting cross sections of e+e−to the above modes are shown in Fig.3.We can see the structures at theψ(4040)andψ(4415)in DD∗−cross section is complicated with several local maxima and minima, especially large cross section near theψ(4040)and ψ(4160),while in DD, D D∗,and D∗References1Aubert B et al(BaBar Collaboration).Phys.Rev.Lett., 2005,95:1420012HE Q et al(CLEO Collaboration).Phys.Rev.D,2006,74: 091104(R)3YUAN C Z et al(Belle Collaboration).Phys.Rev.Lett., 2007,99:1820044Aubert B et al(BaBar Collaboration).Phys.Rev.Lett., 2007,98:2120015W ANG X L et al(Belle Collaboration).Phys.Rev.Lett., 2007,99:1420026Coan T E et al(CLEO Collaboration).Phys.Rev.Lett., 2006,96:1620037YUAN C Z et al(Belle Collaboration).Phys.Rev.D,2008, 77:011105(R)8Osterfeld A et al(Crystal Ball Collaboration).Report No.SLAC-PUB-4160,1986,unpublished9BAI J Z et al(BES Collaboration).Phys.Rev.Lett.,2002, 88:10180210Seth K K.Phys.Rev.D,2005,72:01750111Ablikim M et al(BES Collaboration).arXiv:0705.4500 [hep-ex]12Barnes T,Godfrey S,Swanson E S.Phys.Rev.D,2005, 72:05402613Charge-conjugate modes are included throughout this re-port14Poling R(for CLEO Collaboration).arXiv:0606016[hep-ex]15Aubert B et al(BaBar Collaboration).arXiv:0607083[hep-ex]16Pakhlova G et al(Belle Collaboration).Phys.Rev.D,2007, 77:011103(R)17Pakhlova G et al(Belle Collaboration).Phys.Rev.Lett., 2007,98:09200118Pakhlova G et al(Belle Collaboration).arXiv:0708.3313 [hep-ex],Phys.Rev.Lett.(in press)19Abashian A et al(Belle Collaboration).Nucl.Instr.and Methods in Phys.Res.Sect.A,2002,479:11720Kurokawa S,Kikutani E.Nucl.Instrum.Methods in Phys.Res.Sect.A,2003,499:1,and other papers included in this volume21Eichten E et al.Phys.Rev.D,1980,21:20322Olsen S L.arXiv:0801.1153[hep-ex]23For a recent review,see for example,Swanson E S.Phys.Rept.,2006,429:243;Klempt E,Zaitsev A.Phys.Rept., 2007,454:1。

桂林Unit,24年小学5年级上册英语第三单元期中试卷考试时间：80分钟（总分:110）A卷一、综合题(共计100题共100分)1. 填空题：Seeds can be stored for __________ (未来) planting.2. 填空题：I can ride my bike ______.3. 听力题：She wears a ________ (hat) in summer.4. 选择题：What do we call the process of converting a gas into a solid?A. DepositionB. EvaporationC. CondensationD. Sublimation5. 填空题：The rabbit hops around the _______ (花园).6. 听力题：I have a _____ (pen/pencil) in my backpack.7. built their empire in ________ America. 填空题：The Inca8. 填空题：I love to ______ (与朋友一起) share my knowledge.9. 选择题：What is the term for the amount of space an object occupies?A. MassC. WeightD. Density答案:B10. 选择题：What is the capital of France?A. ParisB. LyonC. MarseilleD. Nice答案:A11. 填空题：A ___ (小鱼) glides through the water.12. 填空题：The _____ (果树) produces sweet fruit.13. 填空题：I have a toy _______ that can spin and twirl around, making me smile.14. 选择题：What is the opposite of 'fast'?A. QuickB. SpeedyC. SlowD. Rapid答案:C15. 选择题：How many fingers does a human have?A. 8B. 10C. 12D. 1416. ts can ________ (繁殖) quickly. 填空题：Some pla17. 填空题：I like to paint ______ pictures.18. 选择题：What color is the grass?A. BlueC. GreenD. Brown答案:C19. 填空题：The rabbit has powerful _______ (后腿) for jumping.20. 听力题：A chemical reaction that produces gas can be identified by the formation of _____ bubbles.21. 填空题：The flowers are _______ (在开).22. 听力题：The rabbit is _____ (big/small).23. 选择题：What is the name of the famous bridge in San Francisco?A. Brooklyn BridgeB. Golden Gate BridgeC. Tower BridgeD. Sydney Harbour Bridge24. 选择题：What is the main ingredient in pancakes?A. RiceB. FlourC. SugarD. Milk答案: B25. 听力题：I can ___ (whistle) a tune.26. 听力题：A base reacts with an acid to produce _______.27. 选择题：What is the tallest mountain in the world?A. K2B. KilimanjaroC. EverestD. McKinleyThe ________ (湿润) climate suits many plants.29. 听力题：She is _______ (whispering) a secret to her friend.30. 选择题：What do you call a large body of saltwater?A. RiverB. OceanC. LakeD. Pond答案: B31. 选择题：Which one is a primary color?A. PurpleB. OrangeC. YellowD. Brown32. 选择题：What is the fastest land animal?A. CheetahB. HorseC. LionD. Gazelle33. 选择题：What do you call the liquid part of blood?A. PlasmaB. PlateletsC. CellsD. Clots答案: A34. 填空题：I like to play with my _______ in the park (我喜欢在公园里和我的_______玩).35. 填空题：The baby is _______ (笑着).36. 听力题：The main product of cellular respiration is _______.There is a big _______ (树) in my backyard.38. 听力题：The ____ can dive deep underwater to catch fish.39. 听力题：The capital of Myanmar is _______.40. 听力题：The main gas in the atmosphere is ______.41. 听力题：The main gas that contributes to global warming is __________.42. 选择题：What is the primary ingredient in a shepherd's pie?A. BeefB. ChickenC. LambD. Pork43. 听力题：A physical change can be easily ______.44. 听力题：We will _______ (go) to the theater tonight.45. 听力填空题：I believe that everyone should practice self-care by __________.46. 填空题：古代埃及人相信________ (afterlife) 的存在。

魅力的本质(The Essence of Charm)charm is the ultimate weapon, the supreme seduction, against which there are few defenses. if you've got it, you need neither money, looks, nor pedigree. it's a gift, given only to give away, and the more used, the more there is. it is also a climate of behavior set for perpetual summer and thermostatically controlled by taste and tact.true charm is an aura, an invisible musk in the air; if you see it working, the spell is broken. charm is dynamic, and cannot be turned on and off at will. as to its ingredients, there is no fixed formula. a whole range of mysteries goes into the caldron, but the magic it offers must be absolute-one cannot be "almost" or "partly" charmed.in a woman, charm is probably more exacting than in a man, requiring a wider array of subtleties. it is a light in the face, an air of exclusive welcome, an almost impossibly sustained note of satisfaction in one's company, and regret without fuss at parting. a woman with charm finds no man dull; indeed, in her presence he becomes not just a different person but the person he most wants to be. such a woman gives life to his deep-held fantasies by adding the necessary conviction to his long suspicion that he is king.of those women who have most successfully charmed me i remember chiefly their voices and eyes. their voices were intimate and enveloping. the listening eyes, supreme charm in a woman, betrayed no concern with any other world than this, warmly wrapping one round with total attention and turning one's lightest words to gold. theirs was a charm that must have continued to exist, like the flower in the desert, even when there was nobody there to see it.a woman's charm spreads round herthat particular glow of well-being for which any man will want to seek her out and, by making full use of her nature, celebrates the fact of his maleness and so gives him an extra shot of life. her charm lies also in that air of timeless maternalism, that calm and pacifying presence, which can dispel a man's moments of frustration and anger and restore his failures of will.charm in a man, i suppose, is his ability to capture the complicity of a woman by a single-minded acknowledgment of her uniqueness. here again it is a question of being totally absorbed, of really forgetting that anyone else exists, for nothing more fatally betrays than the suggestion of a wandering eye. silent devotion is fine, but seldom sufficient; it is what a man says that counts, the bold declarations, the flights of fancy, the uncovering of secret virtues. a man is charmed through his eyes, a woman by what she hears, so no man need to be too anxious about his age: as wizened voltaire once said: "give me a few minutes to talk away my face and i can seduce the queen of france."but charm isn't exclusively sexual; it comes in a variety of cooler flavors. most children have it--till they are told they have it--and so do old people with nothing to lose; animals, too, of course. with children and smaller animals, it is often in the shape of the head and in the chaste unaccusing stare; with young girls and ponies, a certain stumbling awkwardness, a leggy inability to control their bodies. but all these are passive and appeal by capturing one's protective instincts.you know who has charm. but can you acquire it? properly, you can't, because it's an originality of touch you have to be born with. or it's something that grows naturally out of another quality, like the simple desire to make people happy. certainly, charm is not a question of learning palpable tricks, like wrinkling your nose,or having a laugh in your voice. on the other hand, there is an antenna, a built-in awareness of others, which most people have, and which care can nourish.but in a study of charm, what else does one look for? apart from the ability to listen--rarest of all human virtues--apart from warmth, sensitivity, and the power to please, there is a generosity which makes no demands. charm spends itself willingly on young and old alike, on the poor, the ugly, the dim, the boring, on the last fat man in the corner. it reveals itself also in a sense of ease, in casual but perfect manners, and often in a physical grace which springs less from an accident of youth than from a confident serenity of mind. any person with this is more than just a popular fellow; he is also a social healer.charm, in the end, is a most potent act of behavior, the laying down of a carpet by one person for another to give his existence a moment of honor. it is close to love in that it moves without force, bearing gifts like the growth of daylight. it snares completely, but is never punitive. it disarms by being itself disarmed, strikes without wounds, wins wars without casualties--though not, of course, without victims.in the armory of man, charm is the enchanted dart, light and subtle as a hummingbird. but it is deceptive in one thing--like a sense of humor, if you think you've got it, you probably haven't.。

小学上册英语第1单元真题试卷(有答案)英语试题一、综合题(本题有100小题，每小题1分，共100分.每小题不选、错误，均不给分)1.The flowers in the garden are _______ and cheerful, spreading happiness.2. A _______ (海鸥) flies near the shore.3.I can sing songs with my musical ________ (玩具名称).4.The density of a substance tells us how much mass is in a _______.5.What do we call the main ingredient in salad?A. LettuceB. DressingC. VegetablesD. All of the above答案:D. All of the above6.What is the capital of Portugal?A. LisbonB. MadridC. RomeD. Athens答案: A. Lisbon7.I want to _____ (read/write) a story.8.The capital of Brazil is ________ (巴西的首都是________).9.The chemical symbol for chromium is ______.10.I have learned a lot about __________ in school this year.11.The ice cream is ________ (冷).12.This boy, ______ (这个男孩), is working on a science project.13.I like to ride ______ with my friends. (horses)14.The ______ (小鱼) swims gracefully in the aquarium.15. A _______ is used to measure electrical current.16.The ancient Egyptians used _____ for mummification.17.He is a mechanic, ______ (他是一名机械师), who fixes cars.18.The main gas emitted from vehicles is __________.19.The ancient Greeks held _____ to commemorate their gods.20.The _______ plays an important role in the ecosystem.21.What is the opposite of "hot"?A. ColdB. WarmC. HighD. Tall答案:A Cold22.The first successful vaccine was developed for _______.23.My teacher helps me with ____.24. A neutral solution has a pH of _____.25.My aunt, ______ (我的阿姨), loves to travel and explore.26.What do we call a story that is made up?A. FictionB. Non-fictionC. BiographyD. History答案:A27.In 1776, the Declaration of Independence was signed in _____.28.The Titanic was a famous _______ ship.29.I can use my toy ________ (玩具名称) to inspire creativity.30.The __________ can reveal the geological timeline of Earth.31.I want to learn how to ______ (skate) on ice.32.What is 9 2?A. 5B. 6C. 7D. 8答案: C33.The ancient civilizations of the Americas built ________ for religious ceremonies.34.The _______ of sound is perceived as volume.35.The teacher promotes _____ (学习) in the classroom.36.I enjoy planting ________ in different colors.37.ts can _____ (存活) in extreme conditions. Some pla38.The chemical formula for water is ______.39.The __________ (历史的背景) shapes individual experiences.40.We enjoy _____ (hiking) trails.41. A reaction that results in a change of state is called a ______ reaction.42.The chemical formula for lithium hydroxide is _______.43.The __________ (历史的洞察) opens eyes.44.My favorite animal is a _______ (海豚).45.I have a favorite ________ that I bring everywhere.46.The car is parked _____ (in front/behind) the house.47.The ______ teaches us about international relations.48.The capital of Oman is __________.49.My sister and I have fun ____.50. A _____ (鱼) swims happily in the water. It has shiny scales. 一条鱼在水中快乐地游泳。

小学上册英语第三单元寒假试卷英语试题一、综合题(本题有100小题，每小题1分，共100分.每小题不选、错误，均不给分)1.My friends and I had a _________ (玩具比赛) to see who has the best toys.2.The plants need _______ (阳光) and water.3.The chemical formula for sodium thiocyanate is ______.4.The squirrel stores _______ (食物) for winter.5. A base tastes _____ and can turn red litmus paper blue.6.The _____ (环境) plays a big role in plant health.7.I enjoy _______ (参加)演出.8. A reaction that consumes energy is called an ________ reaction.9.What is the term for a scientist who studies living organisms?A. BiologistB. ChemistC. PhysicistD. GeologistA10.What is the color of fresh grass?A. GreenB. BrownC. YellowD. Red11.The ________ (灌木) can be trimmed into shapes.12.If you squeeze a balloon, the air inside gets _______.13.The __________ (历史的交互) fosters dialogue.14.My favorite color is ________.15.What is the capital of Japan?A. BeijingB. SeoulC. TokyoD. Bangkok16.I have a ________ of candy.17.My cat caught a ________ in the yard.18. A ____ builds intricate tunnels underground.19. A crab can be found in both salt and ________________ (淡水).20.The puppy follows me everywhere, like a ______ (影子).21.I planted _____ (蔬菜) in my garden.22.What do we call the time it takes for the Earth to spin once?A. DayB. MonthC. YearD. Hour23.What is the capital of Tuvalu?A. FunafutiB. NanumeaC. NukufetauD. NiutaoA24.小鱼) swims happily in its tank. The ___25.What is the capital city of Afghanistan?A. KabulB. KandaharC. HeratD. Mazar-i-SharifA26.What is 20 5?A. 10B. 15C. 25D. 30B27.My dad loves to watch _____ (比赛) on TV.28. A rabbit's ears can rotate independently to detect ________________ (声音).29.My ________ (玩具名称) is a fun way to inspire creativity.30.The ________ is where the sun rises in the morning.31.I like to make ______ for my neighbors.32. A parakeet can be green, blue, or ______ (黄色).33. A _____ (生态) approach helps in conservation.34.The __________ (历史的回顾性) fosters reflection.35. A caterpillar turns into a ______.36.I enjoy playing ________ (桌游) on rainy days.37.The _____ (商场) is open all day.38.The chemical symbol for arsenic is _____.39.We will go ______ for ice cream after dinner. (out)40.What is the name of the place where you can buy groceries?A. StoreB. MallC. MarketD. SupermarketD41.What do you call the sweet food made from flour, sugar, and chocolate?A. CakeB. BrownieC. CookieD. MuffinB42.The _____ (植物保护愿景) guides conservation efforts.43.I like to ___ my friends. (visit)44.My aunt goes to the gym to stay ____ (fit).45.My mother is a _____ (护士) who loves her job.46.What instrument has keys and is played by pressing them?A. GuitarB. DrumsC. PianoD. Flute47.What is the name of the first satellite sent into space?A. Apollo 11B. SputnikC. Voyager 1D. Hubble48. A ________ is a mountain range that runs through two countries.49.What do we call a large tree that grows in the rainforest?A. BushB. ShrubC. PalmD. CanopyD50.What is the term for a young tapir?A. CalfB. PupC. KitD. HatchlingA51.At school, I prefer being called ______ by my friends. (在学校，我更喜欢我的朋友叫我。

小学上册英语上册试卷(含答案)英语试题一、综合题(本题有50小题，每小题1分，共100分.每小题不选、错误，均不给分)1 The _____ (teacher/student) is helpful.2 A ______ is a small creature that can be found in ponds.3 The _____ (园艺技巧) can enhance your gardening skills.4 What is the main language spoken in the USA?A. SpanishB. FrenchC. EnglishD. German5 The _____ (balloon/kite) is flying.6 The _______ of a swing is caused by gravity.7 What is 14 + 6?A. 18B. 19C. 20D. 21答案:A8 Abraham Lincoln delivered the Gettysburg __________ (演讲) during the Civil War.9 There are ___ (three/four) books on the table.10 How many strings does a violin have?A. 4B. 5C. 6D. 711 What is the name of the famous ancient structure in England?A. StonehengeB. ColosseumC. Great WallD. Pyramids答案: A. Stonehenge12 What do you call a journey to space?a. Explorationb. Expeditionc. Flightd. Mission答案:D13 This ________ (玩具) is full of possibilities.14 In summer, I enjoy _______ (游泳) in the pool.15 What do we call a large body of saltwater?A. OceanB. SeaC. GulfD. Bay答案: A16 What do we call the tool we use to measure temperature?A. ThermometerB. BarometerC. HydrometerD. Anemometer17 I can see a __________ in the sky.18 I like swimming in the _____ (pool/desk).19 We will go to the ______ (museum) on Saturday.20 We have a ______ (愉快的) celebration for achievements.21 What is the name of the famous mouse created by Walt Disney?A. Mickey MouseB. Donald DuckC. GoofyD. Pluto22 I want to _____ (see/watch) a movie tonight.23 My favorite animal is a ______ (狗) because they are loyal.24 _____ (农田) are areas where crops are grown.25 Salt dissolves in _____.26 How many colors are in a rainbow?A. FiveB. SixC. SevenD. Eight27 The chemical formula for glucose is ______.28 What does a light-year measure?B. DistanceC. SpeedD. Mass29 Which season comes after spring?a. Winterb. Summerc. Falld. Autumn答案:b30 The _____ (冬季) can be harsh for some plants.31 The peacock has beautiful _________. (羽毛)32 The chemical industry produces a wide range of ________ for various applications.33 The soup is ______ (warm) and delicious.34 The dog is _______ (running) after the ball.35 The __________ (历史的呼唤) resonates deeply.36 What is the name of the famous river in Egypt?A. NileB. AmazonC. MississippiD. Yangtze答案: A37 What do we call a place where we can see art?A. MuseumB. GalleryD. Workshop38 Pulsars are rotating neutron _______ that emit beams of radiation.39 The main component of starch is ______.40 The ancient Greeks constructed ________ for their religious ceremonies.41 What is the opposite of "happy"?A. JoyfulB. SadC. ExcitedD. Cheerful42 The ________ (农业可持续发展目标) guide practices.43 The _______ of sound can be amplified with a speaker.44 The ________ (feedback) helps us improve.45 What is the name of the first satellite sent into space?A. Apollo 11B. SputnikC. Voyager 1D. Hubble46 What is the name of the famous American landmark in New York City?A. Golden Gate BridgeB. Statue of LibertyC. Empire State BuildingD. Mount Rushmore47 A dwarf planet is similar to a planet but does not clear its orbit of ______.48 What is the term for an animal that eats both plants and meat?A. HerbivoreB. CarnivoreC. OmnivoreD. Insectivore答案:C. Omnivore49 My brother is my silly _______ who always knows how to make me smile.50 The __________ is a large area of sandy soil.51 What is the name of the famous bear in the cartoon?A. PaddingtonB. Winnie the PoohC. YogiD. Baloo答案:B52 What is the capital of Portugal?A. LisbonB. PortoC. FaroD. Braga53 The study of rocks is known as ______.54 What is the name of the device used to measure pressure?a. Barometerb. Hygrometerc. Thermometerd. Anemometer答案:a55 The __________ (历史的抉择) shapes destiny.56 The __________ is known for its unique wildlife and natural beauty. (新西兰)57 The chemical formula for acetylene is ______.58 Which of these is a cold-blooded animal?A. HumanB. SharkC. SnakeD. Bird答案:C59 I like to _____ (collect/throw) stamps.60 I want to grow a ________ to make my room bright.61 Which animal is known as "man's best friend"?A. CatB. DogC. RabbitD. Fish答案:B62 The _______ (小驴) brays loudly in the pasture.63 My favorite animal at the zoo is a ________.64 The __________ (历史的探索者) uncover stories long forgotten.65 What is the main ingredient in a smoothie?A. IceB. MilkC. FruitD. Sugar66 What is the name of the fairy tale character with long hair?A. CinderellaB. RapunzelC. Snow WhiteD. Belle67 What do we call the solid part of the Earth?A. AtmosphereB. HydrosphereC. LithosphereD. Biosphere答案：C68 I need to _____ (finish/start) my homework.69 What is the name of the large body of saltwater that covers most of the Earth?A. LakeB. SeaC. OceanD. River答案：C70 A cheetah is the fastest _______ on land, running swiftly to catch its prey.71 What do we call a scientist who studies the effects of pollution?a. Environmental scientistb. Ecologistc. Biologistd. Chemist答案:a72 What is the name of the ocean located between Africa and Australia?A. Indian OceanB. Atlantic OceanC. Pacific OceanD. Arctic Ocean答案:A73 The ______ (植物分类) helps identify species.74 The basic unit of a protein is an ________.75 What do you call a young ant?A. LarvaB. PupaC. WorkerD. Queen76 The chemical properties of a substance are observed during a _____ change.77 The first man on the moon was ________ (尼尔·阿姆斯特朗).78 My favorite subject is __________. (数学)79 A garden can attract various ______ (昆虫).80 What is the capital of Cyprus?A. NicosiaB. LimassolC. LarnacaD. Famagusta答案:A81 What do we call the sound a sheep makes?A. MooB. QuackC. BaaD. Neigh答案:C82 I can ________ (jump) very high.83 I like to draw _____ in my notebook.84 My brother has a great sense of __________ (幽默感).85 What do we call the traditional game played with a ball and net?A. CricketB. BaseballC. TennisD. Soccer86 The ____ is known for its agility and speed.87 What do you call a place where animals are kept for public display?A. ParkB. ZooC. FarmD. Aquarium答案: B88 My cousin is very __________ (活泼的) and energetic.89 What is the name of the famous artist known for his paintings of water lilies?A. Claude MonetB. Vincent van GoghC. Pablo PicassoD. Salvador Dalí90 What do we call a young female horse?A. FillyB. ColtC. FoalD. Mare91 What do you call a person who swims?A. DiverB. SurferC. SwimmerD. Sailor答案:C92 What do you call the liquid that comes from trees?A. GumB. SyrupC. SapD. Juice答案:C93 What is the capital of Australia?A. SydneyB. CanberraC. MelbourneD. Brisbane94 A fuel is a substance that can be burned to produce _____.95 The __________ is heavy with clouds. (天空)96 What is the smallest unit of life?A. TissueB. OrganC. CellD. Organism97 The study of compounds containing carbon is called ______ chemistry.98 The process of making charcoal involves _______.99 The __________ is known for its diverse ecosystems.100 We enjoy _____ to the library. (going)。