Study of the Potassium Content in Amaranth Protein Using the Gamma Spectrometry Technique

Understanding Ancient Mesoamerican ArtStarting at the end of the eighteenth century and continuing up to the present, explorers have searched for the ruins of ancient Mesoamerica, a region that includes Central America and central and southern Mexico. With the progress of time, archaeologists have unearthed civilizations increasingly remote in age. It is as if with each new century in the modern era an earlier stratum of antiquity has been revealed. Nineteenth-century explorers, particularly John Lloyd Stephens and Frederick Catherwood, came upon Maya cities in the jungle, as well as evidence of other Classic cultures. Twentieth-century research revealed a much earlier high civilization, the Olmec. It now scarcely seems possible that the frontiers of early Mesoamerican civilization can be pushed back any further, although new work—such as in Oaxaca, southern Mexico—will continue to fill in details of the picture.The process of discovery often shapes what we know about the history of Mesoamerican art. New finds are just as often made accidentally as intentionally. In 1971 workers installing sound and light equipment under the Pyramid of the Sun at Teotihuacan stumbled upon a remarkable cave that has since been interpreted by some scholars as a royal burial chamber. Archaeology has its own fashions too: the isolation of new sites may be the prime goal in one decade and the excavation of pyramids the focus in the next. In a third decade, outlying structures rather than principal buildings may absorb archaeologists’ energies. Nor should one forget that excavators are vulnerable to local interests. At one point, reconstruction of pyramids to attract tourism may be desired; at another, archaeologists may be precluded from working at what has already become a tourist attraction. Also, modern construction often determines which ancient sites can be excavated. In Mexico City, for example, the building of the subway initiated the excavations there and renewed interest in the old Aztec capital.But the study of Mesoamerican art is not based exclusively on archaeology. Much useful information about the native populations was written down in the sixteenth century, particularly in central Mexico, and it can help us unravel the pre-Columbian past (the time prior to the arrival of Columbus in the Americas in 1492). Although many sources exist, the single most important one to the art historian is Bernardino de Sahagún’s General History of the Things of New Spain. A Franciscan friar (member of the Roman Catholic religious order), Sahagún recorded for posterity many aspects of pre-Hispanic life in his encyclopedia of twelve books, including history, ideology, and cosmogony (theories of the origin of the universe), as well as detailed information on the materials and methods of the skilled native craft workers. Furthermore, traditional ways of life survive among the native peoples of Mesoamerica, and scholars have increasingly found that modern practice and belief can decode the past. Remarkably, some scholars have been turned this process around, teaching ancient writing to modernpeoples who may use it to articulate their identity in the twenty-first century.During the past 40 years, scholars also have made great progress in deciphering and interpreting ancient Mesoamerican writing systems, a breakthrough that has transformed our understanding of the pre-Columbian mind. Classic Maya inscriptions, for example—long thought to record only calendrical information and astrological incantations—can now be read, and we find that most of them glorify family and ancestry by displaying the right of individual sovereigns to rule. The carvings can thus be seen as portraits or public records of dynastic power. Although scholars long believed that Mesoamerican artists did not sign their works, Mayanist scholar David Stuart’s 1986 deciphering of the Maya glyphs (written symbols) for “scribe” and “to write” opened a window on Maya practice; now we know at least one painter of ceramic vessels was the son of a king. Knowledge of the minor arts has also come in large part through an active art market. Thousands more small-scale objects are known now than in the twentieth century, although at a terrible cost to the ancient ruins from which they have been plundered.Paragraph 1Starting at the end of the eighteenth century and continuing up to the present, explorers have searched for the ruins of ancient Mesoamerica, a region that includes Central America and central and southern Mexico. With the progress of time, archaeologists have unearthed civilizations increasingly remote in age. It is as if with each new century in the modern era an earlier stratum of antiquity has been revealed. Nineteenth-century explorers, particularly John Lloyd Stephens and Frederick Catherwood, came upon Maya cities in the jungle, as well as evidence of other Classic cultures. Twentieth-century research revealed a much earlier high civilization, the Olmec. It now scarcely seems possible that the frontiers of early Mesoamerican civilization can be pushed back any further, although new work—such as in Oaxaca, southern Mexico—will continue to fill in details of the picture.1.According to paragraph 1, which of the following best describes the progressmade in the search for ruins of ancient Mesoamerica?The oldest remains were discovered immediately after Columbus arrived, and later findings correspond to more recent ruins.From the late eighteenth century through the twentieth century, increasingly older remains were found.All of the archaeological work was completed in the twentieth century.Technological developments made it progressively easier for explorers to discover Mayan cities in the jungle.2.Paragraph 1 supports which of the following statements about the revealing ofearly Mesoamerican civilization?The Maya and Olmec civilizations were discovered by explorers at approximately the same time.Most of our understanding of Mesoamerican civilization comes from discoveries made in the twentieth century.The discoveries made at Oaxaca in southern Mexico show that the Olmec civilization had its origins there.Evidence still to be found in Oaxaca, Mexico, is likely to provide additional information about the high civilization of early Mesoamerica.Paragraph 2The process of discovery often shapes what we know about the history of Mesoamerican art. New finds are just as often made accidentally as intentionally. In 1971 workers installing sound and light equipment under the Pyramid of the Sun at Teotihuacan stumbled upon a remarkable cave that has since been interpreted by some scholars as a royal burial chamber. Archaeology has its own fashions too: the isolation of new sites may be the prime goal in one decade and the excavation of pyramids the focus in the next. In a third decade, outlying structures rather than principal buildings may absorb archaeologists’ energies. Nor should one forget that excavators are vulnerable to local interests. At one point, reconstruction of pyramids to attract tourism may be desired; at another, archaeologists may be precluded from working at what has already become a tourist attraction. Also, modern construction often determines which ancient sites can be excavated. In Mexico City, for example, the building of the subway initiated the excavations there and renewed interest in the old Aztec capital.3.In paragraph 2, why does the author discuss the Pyramid of the Sun atTeotihuacan?To introduce the discussion of a specific style of Mesoamerican artTo illustrate the importance of an accidental discoveryTo emphasize the necessity of systematic studyTo argue against the use of modern equipment in archaeology4.The word "outlying" in the passage is closest in meaning toceremonialtemporaryfar from the centersimple5.Which of the following is NOT mentioned in paragraph 2 as a factor affectingthe process of discovery in archaeology?Fashions that change over timeThe popularity of archaeology as a field of studyThe interests of local inhabitantsThe building of modern structures6.The word "initiated" in the passage is closest in meaning todestroyedinterferedwithoccurred at the same time asstartedParagraph 3But the study of Mesoamerican art is not based exclusively on archaeology. Much useful information about the native populations was written down in the sixteenth century, particularly in central Mexico, and it can help us unravel the pre-Columbian past (the time prior to the arrival of Columbus in the Americas in 1492). Although many sources exist, the single most important one to the art historian is Bernardino de Sahagún’s General History of the Things of New Spain. A Franciscan friar (member of the Roman Catholic religious order), Sahagún recorded for posterity many aspects of pre-Hispanic life in his encyclopedia of twelve books, including history, ideology, and cosmogony (theories of the origin of the universe), as well as detailed information on the materials and methods of the skilled native craft workers. Furthermore, traditional ways of life survive among the native peoples of Mesoamerica, and scholars have increasingly found that modern practice and belief can decode the past. Remarkably, some scholars have been turned this process around, teaching ancient writing to modern peoples who may use it to articulate their identity in the twenty-first century.7.The word "exclusively" in the passage is closest in meaning toexactlysolelytraditionallyprimarily8.According to paragraph 3, why was Bernardino de Sahagún important to thestudy of Mesoamerican art?He recorded detailed information about native populations in the sixteenth century.He made important archaeological discoveries in central Mexico.He studied the methods and materials of skilled Mesoamerican craft workers as a basis for his own art.He encouraged native people to preserve their traditional ways of life.9.The word "posterity" in the passage is closest in meaning tothe religious leadershippublicationthe native peoplefuture generations10.According to paragraph 3, which of the following is true of ancientMesoamerican writing?It is very similar to the modern writing of Mesoamerican peoples.It is not as old as originally thought.It can be used by modern peoples to express their own identities.It is most thoroughly understood by skilled native craft workers.Paragraph 4During the past 40 years, scholars also have made great progress in deciphering and interpreting ancient Mesoamerican writing systems, a breakthrough that has transformed our understanding of the pre-Columbian mind. Classic Maya inscriptions, for example—long thought to record only calendrical information and astrological incantations—can now be read, and we find that most of them glorify family and ancestry by displaying the right of individual sovereigns to rule. The carvings can thus be seen as portraits or public records of dynastic power. Although scholars long believed that Mesoamerican artists did not sign their works, Mayanist scholar David Stuart’s 1986 deciphering of the Maya glyphs (written symbols) for “scribe” and “to write” opened a window on Maya practice; now we know at least one painter of ceramic vessels was the son of a king. Knowledge of the minor arts has also come in large part through an active art market. Thousands more small-scale objects are known now than in the twentieth century, although at a terrible cost to the ancient ruins from which they have been plundered.11.According to paragraph 4, how did the deciphering of ancientMesoamerican inscriptions transform our understanding of the pre-Columbian mind?It showed that most attention was given to the prediction and magical control of the future.It revealed a much greater concern with the identity and ancestry of particular individuals than had been suspected.It demonstrated that painting was regarded as a royal art.It disproved the idea that the Maya devoted much thought to record keeping.12.According toparagraph 4, all of the following are true of Mayanist scholarDavid Stuart’s 1986 discovery EXCEPT:It reversed a belief held by earlier scholars.It uncovered long lists of royal dynastic records.It allowed scholars to understand two glyphs for the first time.It revealed that at least one Maya painter was a king’s son.Paragraph 2The process of discovery often shapes what we know about the history of Mesoamerican art. New finds are just as often made accidentally as intentionally. ■In 1971 workers installing sound and light equipment under the Pyramid of the Sun at Teotihuacan stumbled upon a remarkable cave that has since been interpreted by some scholars as a royal burial chamber. ■Archaeology has its own fashions too: the isolation of new sites may be the prime goal in one decade and the excavation of pyramids the focus in the next. In a third decade, outlying structures rather than principal buildings may absorb archaeologists’ energies. ■Nor should one forget that excavators are vulnerable to local interests. ■At one point, reconstruction of pyramids to attract tourism may be desired; at another, archaeologists may be precluded from working at what has already become a tourist attraction. Also, modern construction often determines which ancient sites can be excavated. In Mexico City, for example, the building of the subway initiated the excavations there and renewed interest in the old Aztec capital. 13.Look at the four squares [■] that indicate where the following sentence canbe added to the passage.The chance discovery has done as much for our understanding of the pyramid as any systematic study would have.Where would the sentence best fit?14.Directions: An introductory sentence for a brief summary of the passage isprovided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some answer choices do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.Drag your choices to the spaces where they belong. To review the passage, click on View Text.Answer ChoicesJohn Lloyd Stephens and Frederick Catherwood used the ruins of Maya cities in the jungle as evidence that the Maya civilization was older than the Olmec civilization.Classic Maya inscriptions primarily recorded calendrical information, astrological incantations, and signature …Often discoveries accidentally, Mesoamerican pyramids not only contain numerous samples of native art but also attract tourism.Words & Phrases1.the ruins of ancient Mesoamerica：古代中美洲的废墟2.unearthed civilizations increasingly remote in age：出土（年龄上越来越久远的）文明unearth：v. 挖掘，出土3.an earlier stratum of antiquity：一个更早的古代岩层Stratum: 岩层扩展：Stratification: (尤指社会的)分层，形成阶层 Stratification is the division of something, especially society, into different classes or layers4.came upon Maya cities in the jungle：偶然遇到密林里的玛雅城市Come upon：偶然碰到(或发现) If you come upon someone or something, you meet them or find them by chance.5.workers installing sound and light equipment：安装音响和光照设备的工人6.stumbled upon a remarkable cave：偶然发现一个极大的洞穴Stumble：v. 跌跌撞撞走，结巴说stumble upon：偶然发现7. a royal burial chamber：一个皇室的埋葬密室royal：adj. 皇室的8.the excavation of pyramids：金字塔的挖掘9.outlying structures rather than principal buildings：外围结构而非主要建筑物Outlying：adj. 偏僻的；边远的；远离城市的 Outlying places are far away from the main cities of a country10.initiated the excavations there: 引发了那个地方的考古挖掘initiate= start= trigger 引发，开始excavate = unearth v.挖掘11.unravel the pre-Columbian past：解开(哥伦布发现美洲大陆之前的)过去unravel: v. 解开绳套或谜团pre-Columbian：adj. 哥伦布发现美洲大陆之前的12.turned this process around：将该过程反转turn around = reverse 反转13.to articulate their identity in the twenty-first century：去清晰地表达他们在21世纪的身份articulate：v. 清晰表达Syntax1.It now scarcely seems possible that the frontiers of earlyMesoamerican civilization can be pushed back any further, although new work—such as in Oaxaca, southern Mexico—will continue to fill in details of the picture.2.In 1971 workers installing sound and light equipment under thePyramid of the Sun at Teotihuacan stumbled upon a remarkable cave that has since been interpreted by some scholars as a royal burial chamber.3.Archaeology has its own fashions too: the isolation of new sites maybe the prime goal in one decade and the excavation of pyramids the focus in the next.4.At one point, reconstruction of pyramids to attract tourism may bedesired; at another, archaeologists may be precluded from working at what has already become a tourist attraction.Preclude：v. 排除在外，阻止=prevent5.ideology, andas well asof the skilled native craft workers.Catholic：adj. 天主教的Posterity：n. 后代=offspring=descendantPost-：后缀，意为后面，post-war：战后的Encyclopedia：n. 百科全书Ideology：意识形态;思想体系;思想方式 An ideology is a set of beliefs, especially the political beliefs on which people, parties, or countries base their actionsCosmogony：n. 宇宙的产生Craft workers: 手工艺工人6.During the past 40 years, scholars also have made great progress indeciphering and interpreting ancient Mesoamerican writing systems,a breakthrough that has transformed our understanding of thepre-Columbian mind.Decipher：v. 破解密码=decode, cipher=code 密码Interpret：v.解释，理解Transform：v. 转变7.Calendrical：历法的，日历的astrological incantations：占星的咒语incantation：咒语 An incantation is a series of words that a person says or sings as a magic spellglorify：赞美；颂扬；吹捧；美化 To glorify something means to praise it or make it seem good or special, usually when it is notancestry：n. <集合词>祖先；世家，名门sovereigns：n. 君主8.sign their works, Mayanistthe Maya glyphs (written symbo ls) for “scribe”practice; now we know at least oneMayanist：玛雅专家decipher: 破译（密码）；辨认（潦草字迹）；解读；解释（古代文学）glyphs：象形文字practice: n. 通常做法；常规；惯例 You can refer to something that people do regularly as a practice.Ceramic vessels: 瓷器器皿Vessel：n. 器皿；船只；血管9.Thousands more small-scale objects are known now than in thetwentieth century, although at a terrible cost to the ancient ruins from which they have been plundered.At a …cost = at …expense 以…的代价plunder：v. 抢劫，窃取Abstract →Concrete1.The process of discovery often shapes what we know about thehistory of Mesoamerican art.2.Archaeology has its own fashions too.3.Nor should one forget that excavators are vulnerable to localinterests.4.Also, modern construction often determines which ancient sites canbe excavated.5.But the study of Mesoamerican art is not based exclusively onarchaeology.6.During the past 40 years, scholars also have made great progress indeciphering and interpreting ancient Mesoamerican writing systems,a breakthrough that has transformed our understanding of thepre-Columbian mind.How Soil is FormedSoil formation is a dynamic process that takes place in different environments. It is strongly influenced by the parent material, climate (largely vegetation and temperature and water exchanges), topography (the elevations, depressions, directions and angles of slopes, and other surface features of the landscape), and time.The parent material is the unconsolidated mass on which soil formation takes place. This material may or may not be derived from the on-site geological substrate or bedrock on which it rests. Parent materials can be transported by wind, water, glaciers, and gravity and deposited on top of bedrock. Because of the diversity of materials involved, soils derived from transported parent materials are commonly more fertile than soils from parent materials derived in place. Whatever the parent material, whether derived in place from bedrock or from transported material, it ultimately comes from geological materials, such as igneous, sedimentary, and metamorphic rocks, and the composition of the rocks largely determines the chemical composition of the soil.Climate is most influential in determining the nature and intensity of weathering and the type of vegetation that further affects soil formation. The soil material experiences daily and seasonal variations in heating and cooling. Open surfaces exposed to thermal radiation undergo the greatest daily fluctuations in heating and cooling, soils covered with vegetation the least. Hill slopes facing the sun absorb more heat than those facing away from the sun. Radiant energy has a pronounced effect on the moisture regime, especially the evaporative process and dryness. Temperature can stimulate or inhibit biogeochemical reactions in soil material.Water is involved in all biogeochemical reactions in the soil because it is the carrier of the acids that influence the weathering process. Water enters the soil material as a liquid and leaves it as a liquid by percolation (the slow movement of water through the soil’s pores) and as a gas through evaporation. The water regime—the water flow over a given time—in soil material is sporadic, and in many parts of the Earth is highly seasonal. Water that enters the soil during heavy rainfall and snowmelt moves down through the soil. As it moves, it leaves behind suspended material and may carry away mineral matter in solution, a process called leaching. On sloping land, water distributes material laterally (sideways) through the soil.Topography is a major factor in soil development. More water runs off and less enters the soil on steep slopes than on relatively level land. Water draining from slopes enters the soil on low and flat land. Thus soils and soil material tend to be dry on slopes and moist on wet on the low land. Steep slopes are subject to surface erosion and soil creep—the downslope movement of soil material, which accumulates on lower slopes and lowlands.Vegetation, animals, bacteria, and fungi all contribute to the formation of soil. Vegetation, in particular, is responsible for organic material in the soil and influences its nutrient content. For example, forests store most of their organic matter on the surface, whereas in grasslands most of the organic matter added to the soil comes from the deep fibrous root systems. Organic acids produced by vegetation accelerate the weathering process.The weathering of rock material and the accumulation, decomposition, and mineralization or organic material require considerable time. Well-developed soils in equilibrium with weathering, erosion, and biotic influences may require 2,000 to 20,000 years for their formation, but soil differentiation from parent material may take place in as short a time as 30 years. Certain acid soils in humid regions develop in 2,000 years because the leaching process is speeded by acidic materials. Parent materials heavy in texture require a much longer time to develop into soils because of an impeded downward flow of water. Soils developmore slowly in dry regions than in humid ones. Soils on steep slopes often remain poorly developed regardless of geological age because rapid erosion removes soil nearly as fast as it is formed. Floodplain soils age little through time because of the continuous accumulation of new materials. Such soils are not deeply weathered and are more fertile than geologically old soils because they have not been exposed to the leaching process as long. The latter soils tend to be infertile because of long-time leaching of nutrients without replacement from fresh material.Paragraph 2The parent material is the unconsolidated mass on which soil formation takes place. This material may or may not be derived from the on-site geological substrate or bedrock on which it rests. Parent materials can be transported by wind, water, glaciers, and gravity and deposited on top of bedrock. Because of the diversity of materials involved, soils derived from transported parent materials are commonly more fertile than soils from parent materials derived in place. Whatever the parent material, whether derived in place from bedrock or from transported material, it ultimately comes from geological materials, such as igneous, sedimentary, and metamorphic rocks, and the composition of the rocks largely determines the chemical composition of the soil.1.According to paragraph 2, which of the following is true about parent materialfound at a given site?It was most likely deposited there by glaciers rather than by wind and water. It is formed and consolidated entirely from the bedrock on which it rests.It can vary in its richness and fertility according to where it originated.The speed with which it is transported determines its location.2.Which of the sentences below best expresses the essential information in thehighlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.Transported parent materials, parent materials derived in place from bedrock, and various kinds of rocks all contribute to the composition of a soil.The chemical composition of a soil is ultimately determined by the geological materials from which it forms, regardless of where or how the parent material originates.The parent material from which a soil is formed ultimately comes from igneous, sedimentary, and metamorphic rocks.The composition of the geological materials from which the parent material was originally derived can be determined by studying the chemical composition of the soil.Paragraph 3Climate is most influential in determining the nature and intensity of weatheringand the type of vegetation that further affects soil formation. The soil material experiences daily and seasonal variations in heating and cooling. Open surfaces exposed to thermal radiation undergo the greatest daily fluctuations in heating and cooling, soils covered with vegetation the least. Hill slopes facing the sun absorb more heat than those facing away from the sun. Radiant energy has a pronounced effect on the moisture regime, especially the evaporative process and dryness. Temperature can stimulate or inhibit biogeochemical reactions in soil material.3.The word "further" in the passage is closest in meaning toas a resultadditionallypotentiallyeventually4.The word "fluctuations" in the passage is closest in meaning toextremesincreasesvariationseffects5.The word "inhibit" in the passage is closest in meaning toinitiateremoveslow downdamageParagraph 4Water is involved in all biogeochemical reactions in the soil because it is the carrier of the acids that influence the weathering process. Water enters the soil material as a liquid and leaves it as a liquid by percolation (the slow movement of water through the soil’s pores) and as a gas through evaporation. T he water regime—the water flow over a given time—in soil material is sporadic, and in many parts of the Earth is highly seasonal. Water that enters the soil during heavy rainfall and snowmelt moves down through the soil. As it moves, it leaves behind suspended material and may carry away mineral matter in solution, a process called leaching. On sloping land, water distributes material laterally (sideways) through the soil.6.According to paragraph 4, water passing through the soil canaffect the soil’scomposition in which of the following ways?By stopping certain chemical reactions from taking place in the soilBy carrying away mineralsBy reducing the acidity of the soil。

2024年05版小学英语第四单元期中试卷考试时间：100分钟（总分:100）A卷考试人：_________题号一二三四五总分得分一、综合题(共计100题)1、填空题：The first man to walk on the moon was ________.2、听力题：The sky is ___ (blue/green) today.3、填空题：The first president of South Africa after apartheid was _______. (曼德拉)4、选择题：What do we call a person who studies plants?A. BiologistB. BotanistC. ChemistD. Geologist5、听力题：The chemical formula for potassium permanganate is ______.6、听力题：The tree has _____ (leaves/branches).7、听力题：A vacuum has no ______.8、What is the name of the famous painting by Edvard Munch?A. The ScreamB. Starry NightC. The Persistence of MemoryD. The Mona Lisa答案: A9、Which of these is a type of pasta?A. RiceB. NoodlesC. BreadD. Cake10、听力题：An ionic compound is formed when electrons are _______ between atoms.11、填空题：The _____ (孔雀) spreads its colorful feathers to attract mates.孔雀展开它五彩斑斓的羽毛吸引配偶。

小学下册英语第2单元寒假试卷(含答案)考试时间：90分钟（总分:100）A卷考试人：_________题号一二三四五总分得分一、综合题(共计100题共100分)1. ts are _____ (外来物种) that can be invasive. 填空题：Some pla2. 听力题：When water freezes, it becomes _______.3. 填空题：I love to ______ (与朋友一起) plan events.4. 选择题：Which planet is known as the "Red Planet"?A. EarthB. MarsC. JupiterD. Saturn5. 填空题：I have a _____ (风筝) that I fly during the spring. 我有一个春天放的风筝。

6. 听力题：The atomic mass of an element is the number of protons plus ______.7. 听力题：The study of Earth's geology is essential for resource ______.8. 选择题：Which food is known for being round and topped with cheese?A. SandwichB. PizzaC. SaladD. Burger答案:BA ______ (虫子) crawls on the ground.10. 听力题：The cat sleeps on the _____.11. 填空题：Crickets make a _______ (声音) at night.12. 听力题：My mom loves to do ____ (home improvement).13. 听力题：The ____ has a long tail and loves to swing from branches.14. 选择题：What do you call a story that explains how something came to be?A. LegendB. MythC. TaleD. Fable答案:B15. 填空题：A cat's purr can be soothing and is often thought to be a sign of ________________ (幸福).16. 选择题：What is the capital city of Italy?A. VeniceB. RomeC. FlorenceD. Naples17. 填空题：Cows give us _______ (牛奶).18. 填空题：The ________ (文化交流) enhances our understanding.19. 选择题：What do we call a person who plays music?A. ArtistB. MusicianC. PainterD. WriterMy dad works in a __________. (办公室)21. 听力题：The __________ is a famous area known for its beaches.22. 填空题：The assassination of Archduke Ferdinand sparked ________ (第一次世界大战).23. 填空题：My mom works as a _______ (职业). She is very _______ (形容词) and helps many people.24. 听力题：My sister is a ______. She loves to play sports.25. 填空题：The __________ was bright and made me smile. (阳光)26. 选择题：What shape has three sides?A. SquareB. TriangleC. CircleD. Rectangle答案：B27. 选择题：Which animal is known for its long neck?A. ElephantB. GiraffeC. LionD. Zebra答案: B28. Listen and number.听录音，给下面的图片标出正确的顺序。

小学下册英语第二单元综合卷(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 chemical reaction can be observed through changes in ______.2.An endothermic reaction requires _____ from its surroundings.3.The cake is _____ with candles. (decorated)4.The cake is ________ delicious.5.The _____ (night) is quiet.6.The ________ is my favorite animal to watch.7.The periodic table has groups and ______.8.The _______ of sound can travel through different mediums at different speeds.9.I have a toy _______ that dances and sings all my favorite songs.10.The ancient Mayans were skilled in ________ and astronomy.11.I love to ______ (与他人分享) my interests.12.The __________ can help reveal patterns in geological formations.13.I help my sister with her __________. (作业)14.I see ___ (stars/clouds) in the sky.15.I can ______ (draw) pictures of animals.16. A chemical reaction requires a change in ______.17.Planting flowers can enhance ______ (社区) beauty.18.I can travel with my ________ (玩具名称).19.I need to ___ (pack/unpack) my bag.20. A reaction that produces a solid precipitate is called a ______ reaction.21.What is the name of the city where the Statue of Liberty is located?A. Washington D.C.B. New York CityC. Los AngelesD. Chicago答案: B22. A ________ (草丛) provides shelter for wildlife.23.The baby is _____ (crying/sleeping) in the crib.24.Electric charges can be positive or ______.25.看图片,选词语。