试卷答案B卷

2022 年一级建造师之一建工程法规综合检测试卷 B卷含答案单选题(共 60 题)1、2017 年 3 月 1 日甲施工企业向乙钢材商发出采购单购买一批钢材。

要求乙在 3 月 5 日前承诺。

3 月 1 日，乙收到甲的采购单， 3 月 2 日，甲再次发函至乙取消本次采购。

乙收到两份函件后， 3 月 4 日，乙发函至甲表示同意履行3 月 1 日的采购单。

关于该案的说法，正确的是( )。

2017A.甲 3 月 2 日的行为属于要约撤回B.乙 3 月 4 日的行为属于新要约C.甲的要约已被撤销D.甲乙之间合同成立【答案】 D2、承包人在施工中遇到暴雨袭击，导致工程停工，同时发生各项费用损失，按照不可抗力索赔处理原则，下列()费用，发包人不予赔偿。

A.被冲坏已施工的基础工程B.停工期间设备闲置C.清理现场，恢复施工D.被冲坏的现场临时道路恢复【答案】 B3、合同生效后，其价款或者报酬的确定顺序是：①按《民法典》相关规定执行；②签订补充协议；③按照交易习惯或者合同的有关条款；④按照合同的约定。

该四种确定方式的正确适用顺序是( )。

A.①②③④B.③④②①C.④②①③D.④②③①【答案】 D4、关于城市建设维护税的说法，正确的是( )。

A.凡缴纳消费税、增值税、营业税的单位，都是城市维护建设税的纳税义务人B.城市维护建设税，以纳税人应当缴纳的消费税、增值税、营业税税额为计税依据C.城市维护建设税，与消费税、增值税、营业税分别缴纳D.凡缴纳消费税、增值税、营业税的个人，不是城市维护建设税的纳税义务人【答案】 A5、关于建筑工程中止和恢复施工的说法,正确的是()A.建筑工程可以无任何理由而中止B.建筑工程中止施工的,应当提前 1 个月向发证机关报告C.建筑工程中止施工后,应当做好建筑工程的维护管理工作D.建筑工程恢复施工之日起 1 个月内,应当向发证机关报告【答案】 C6、甲、乙、丙、丁四家施工单位签订共同投标协议组成联合体，以一个投标人的身份投标。

绝密★启用前2023年重庆市中考数学试卷（B卷）学校:___________姓名：___________班级：___________考号：___________注意事项:1.答卷前，考生务必将自己的姓名、准考证号填写在答题卡上。

2.回答选择题时，选出每小题答案后，用铅笔把答题卡对应题目的答案标号涂黑；如需改动，用橡皮擦干净后，再选涂其他答案标号。

回答非选择题时，将答案写在答题卡上，写在试卷上无效。

3.考试结束后，本试卷和答题卡一并交回。

一、选择题（本大题共10小题，共40.0分。

在每小题列出的选项中，选出符合题目的一项）1. 4的相反数是( )A. 14B. −14C. −4D. 42.四个大小相同的正方体搭成的几何体如图所示，从正面看到的视图是( )A.B.C.D.3.如图，直线a，b被直线c所截，若a//b，∠1=63°，则∠2的度数为( )A. 27°B. 53°C. 63°D. 117°4.如图，已知△ABC∽△EDC，AC：EC=2：3，若AB的长度为6，则DE 的长度为( )A. 4B. 9C. 12D. 13.55. 反比例函数y=6的图象一定经过的点是( )xA. (−3,2)B. (2,−3)C. (−2,−4)D. (2,3)6. 用圆圈按如图所示的规律拼图案，其中第①个图案中有2个圆圈，第②个图案中有5个圆圈，第③个图案中有8个圆圈，第④个图案中有11个圆圈，…，按此规律排列下去，则第⑦个图案中圆圈的个数为( )A. 14B. 20C. 23D. 267. 估计√ 5×(√ 6)的值应在( )√ 5A. 4和5之间B. 5和6之间C. 6和7之间D. 7和8之间8. 如图，AB为⊙O的直径，直线CD与⊙O相切于点C，连接AC，若∠ACD=50°，则∠BAC的度数为( )A. 30°B. 40°C. 50°D. 60°9.如图，在正方形ABCD中，O为对角线AC的中点，E为正方形内一点，连接BE，BE=BA，连接CE并延长，与∠ABE的平分线交于点F，连接OF，若AB=2，则OF的长度为( )A. 2B. √ 3C. 1D. √ 210. 在多项式x−y−z−m−n(其中x>y>z>m>n)中，对相邻的两个字母间任意添加绝对值符号，添加绝对值符号后仍只有减法运算，然后进行去绝对值运算，称此为“绝对操作”.例如：x−y−|z−m|−n=x−y−z+m−n，|x−y|−z−|m−n|=x−y−z−m+n，….下列说法：①存在“绝对操作”，使其运算结果与原多项式相等；②不存在“绝对操作”，使其运算结果与原多项式之和为0；③所有的“绝对操作”共有7种不同运算结果．其中正确的个数是( )A. 0B. 1C. 2D. 3二、填空题（本大题共8小题，共32.0分）11. 计算：|−5|+(2−√ 3)0=______ ．12. 有四张完全一样正面分别写有汉字“清”“风”“朗”“月”的卡片，将其背面朝上并洗匀，从中随机抽取一张，记下卡片正面上的汉字后放回，洗匀后再从中随机抽取一张，则抽取的两张卡片上的汉字相同的概率是______ ．13. 若七边形的内角中有一个角为100°，则其余六个内角之和为______ ．14. 如图，在△ABC中，AB=AC，AD是BC边的中线，若AB=5，BC=6，则AD的长度为______ ．15. 为了加快数字化城市建设，某市计划新建一批智能充电桩，第一个月新建了301个充电桩，第三个月新建了500个充电桩，设该市新建智能充电桩个数的月平均增长率为x，根据题意，请列出方程______ ．16.如图，在矩形ABCD中，AB=2，BC=4，E为BC的中点，连接AE.DE.以E为圆心，EB长为半径画弧，分别与AE，DE交于点M，N.则图中阴影部分的面积为______ (结果保留π)．17. 若关于x的不等式组{x+23>x2+14x+a<x−1的解集为x<−2，且关于y的分式方程a+2y−1+y+21−y=2的解为正数，则所有满足条件的整数a的值之和为______ ．18. 对于一个四位自然数M，若它的千位数字比个位数字多6，百位数字比十位数字多2，则称M为“天真数”.如：四位数7311，∵7−1=6，3−1=2，∴7311是“天真数”；四位数8421，∵8−1≠6，∴8421不是“天真数”，则最小的“天真数”为______ ；一个“天真数”M的千位数字为a，百位数字为b，十位数字为c，个位数字为d，记P(M)=3(a+b)+c+d，Q(M)=a−5，若P(M)Q(M)能被10整除，则满足条件的M的最大值为______ ．三、解答题（本大题共8小题，共78.0分。

小学三年级下册英语第3单元期末试卷(答案和解释)英语试题一、综合题(本题有50小题，每小题2分，共100分.每小题不选、错误，均不给分)1.What do we use to cut paper?A. KnifeB. ScissorsC. SpoonD. Plate2.Which one is the correct spelling?A. appleB. aplpeC. apppleD. applle3.Which of these is a body part?A. HandB. TableC. ChairD. Door4.David and his sister are walking in the park. They see a lot of different flowers, like __________, __________, and __________. David picks a __________ and gives it to his sister. They also see a group of ducks swimming in the __________. The park is very beautiful, and they enjoy their time there.5.Which of these is a means of transportation?A. DogB. CarC. TreeD. Apple6.Which of these animals can swim?A. DogB. FishC. CatD. Horse7.Which one is a kind of bird?A. SparrowB. DogC. ElephantD. Tigerst summer, I ______ (travel) to Italy with my family. We ______ (visit) many famous places like the Colosseum and the Leaning Tower of Pisa. We ______ (take) lots of pictures, and I ______ (make) a scrapbook of our trip. It ______ (be) one of the best vacations I’ve ever had.9.Which animal is the king of the jungle?A. TigerB. ElephantC. LionD. Monkey10.What do we use to write on a whiteboard?A. PenB. ChalkC. MarkerD. Crayon11.I have a pencil. It is _______.A. RedB. WalkC. HappyD. Run12.Which of these is a musical instrument?A. DrumB. PlateC. ChairD. Spoon13.Which one of these is a vegetable?A. CarrotB. AppleC. BananaD. Orange14.Which one is a color?A. TableB. BlueC. DogD. Chair15.There _______ some water in the glass.A. isB. areC. amD. be16.We ______ (not/see) the new movie yet, but we ______ (plan) to watch it next weekend. My friend ______ (recommend) it to me because he ______ (think) it ______ (be) amazing. I ______ (feel) excited to watch it.17.I ______ (read) a new book yesterday. It ______ (be) about a young girl who______ (go) on an exciting adventure. I ______ (finish) the book before bedtime and______ (feel) very happy.18.Which one is a type of transport?A. TableB. CarC. SpoonD. Plate19.I have a big family. There are ______ people in my family: my dad, my mom, my ______, and me. We like to do things together, like going to the ______ to play games, or having a ______ at home. My ______ is very good at cooking, and she often makes us______ for dinner.20.Tom and his friends are at the park. They are playing a game of tag. Tom is__________ and his friend Jack is __________. Jack tries to tag Tom, but Tom runs__________. After a while, Jack gets tired and stops running. Tom then starts to__________ Jack. They both laugh and have a great time together.21.My best friend Tim __________ (like) playing soccer. He __________ (play) in a team every weekend. Last Saturday, his team __________ (win) the match. They__________ (celebrate) with some pizza after the game. Tim __________ (feel) very happy because it __________ (be) his first win.22.What is the opposite of "full"?A. EmptyB. HeavyC. TallD. Light23.Sophia is reading a book about dinosaurs. She learns that the __________ was one of the largest dinosaurs that ever lived. She also reads about the __________, which was smaller but very fast. Sophia is interested in learning about __________, which had long necks and ate plants. She is excited to read more about dinosaurs in her next book.24.I have a pencil _______ my bag.A. onB. inC. underD. beside25.Which one is an animal that lives in the water?A. CatB. FishC. BirdD. Tiger26.At school, we __________ (study) different subjects. In the morning, we__________ (have) math, English, and science. After lunch, we __________ (do) some art and music. I __________ (like) math the most because I __________ (enjoy) solving problems.27.Which of these is a day of the week?A. SundayB. YellowC. SummerD. October28.I __________ (1) playing soccer with my friends after school. We __________ (2) to the park every day to play. Yesterday, it __________ (3) raining, so we __________ (4) indoors and __________ (5) games instead. I __________ (6) my homework before playing, but today, I __________ (7) it afterward.29.Which one is a number?A. AppleB. ThreeC. SpoonD. Chair30.Which of these is used to clean the floor?A. MopB. ForkC. SpoonD. Plate31.What do we use to brush our teeth?A. BrushB. ToothbrushC. KnifeD. Fork32.Which of these is a vegetable?A. TomatoB. PotatoC. GrapeD. Apple33.Which of these is a body part?A. HeadB. SpoonC. BookD. Cup34.Which of the following sentences uses the correct preposition of place?A. The book is at the table.B. The book is on the table.C. The book is in the table.D. The book is under the table.35.It ______ (rain) heavily when we ______ (arrive) at the school gate. We ______ (wait) for the rain to stop. After about 20 minutes, the rain ______ (stop) and we ______ (go) inside the school.36.What do you use to write on paper?A. BrushB. PenC. PhoneD. Knife37.What do you use to drink liquids?A. SpoonB. GlassC. PlateD. Knife38.Tim is going to the grocery store with his mom. They need to buy some__________, __________, and __________ for dinner. Tim also wants to pick up some __________ for his school project. After getting everything, they go to the __________ to pay. Tim is excited to start working on his project when they get home.39.What do we use to write on paper?A. EraserB. PenC. ScissorsD. Knife40.Which one is a shape?A. CircleB. DogC. TableD. Car41.Which of these is a toy?A. BookB. CarC. DollD. Plate42.Which of these is a color?A. AppleB. GreenC. TableD. Spoon43.Which animal says "woof"?A. CatB. DogC. BirdD. Fish44.Which of these is a season?A. MondayB. SpringC. JanuaryD. Sunday45.I ____ a pencil.A. hasB. haveC. amD. is46.Which animal is known for its shell?A. CatB. TurtleC. LionD. Elephant47.What do we use to brush our teeth?A. CombB. ToothbrushC. TowelD. Spoon48.What do you use to write on paper?A. ForkB. PencilC. SpoonD. Plate49.Which animal is known as the "king of the jungle"?A. lionB. tigerC. elephantD. monkey50.I __________ (1) a letter to my cousin last night. In the letter, I __________ (2) about my new school. I __________ (3) her how much fun it __________ (4) to study here. She __________ (5) me to visit her next summer.(答案及解释)。

小学下册英语第五单元真题试卷(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. A ______ is a type of animal that can fly at night.2.The tree has ______ (green) leaves.3.The sun is _____ after the rain. (shining)4. A rock can be classified based on its ______ and origin.5.The girl sings very ________.6._____ (florists) create beautiful arrangements.7.My grandfather was a ____.8.satellite image) provides aerial views of Earth. The ____9.I have a special place for my toy ____. (玩具名称)10.The _______ of a pendulum can be measured with a stopwatch.11.The grass is _______ (green).12. A __________ is a mountain formed by volcanic activity.13.The city of Ulaanbaatar is the capital of _______.14.Many animals communicate using __________.15.My brother likes to learn about ____ (space).16.The chemical symbol for magnesium is ______.17.The capital of Russia is ________ (莫斯科).18.The chemical symbol for nitrogen is _____.19.The boy likes to play ________.20.The fish tank is _______ (clean).21.The chemical symbol for osmium is ______.22.Dolphins are very _______ (聪明的).23.The __________ is a major river in the southeast United States. (佛罗里达河)24.The _______ (小蓝鸟) sings sweetly in spring.25.An _______ bond forms when electrons are transferred between atoms.26.My favorite dish is ______ (沙拉).27.The ______ (小鱼) swims with its friends.28.The boiling point of a substance can change with ______.29.I love _______ (骑自行车) in the park.30.My mom makes _____ for breakfast. (pancakes)31.The Great Pyramid of Giza was built for Pharaoh ________.32.The leaves turn _______ in autumn, creating a beautiful scene.33.My favorite animal is a ________.34.The __________ of a bird helps it to keep warm.35.Which of these animals can live both in water and on land?A. FishB. FrogC. BirdD. Cat答案:B36.The study of how rocks change over time is known as ______.37.My favorite book is about ______.38.My dad is very ________.39.The weather is very ______ today.40.He is a fast ___. (runner)41.The process of thermal decomposition breaks down compounds using ______.42.I enjoy listening to music. My favorite genre is __________ because it makes me feel __________. I like to sing along to my favorite songs when I’m at home.43.I see a _____ (ship/boat) in the harbor.44.I like _____ (sharing) my gardening tips with others.45.We are going to ______ (celebrate) my birthday.46.The chemical formula for sodium bicarbonate is ______.47.The chemical symbol for potassium is __________.48.I want to learn to ________ (制作陶器).49.My cousin is very __________ (善于沟通).50.The __________ is a large body of fresh water.51.The ancient Egyptians practiced complex ________ (宗教仪式).52.The ______ of a cactus helps it survive in dry conditions. (仙人掌的刺帮助它在干燥的环境中生存。

福建致易电子科技有限公司FUJIAN SKED ELECTRONICS TECHNOLOGY CO., LT23年ESD试卷-B卷答案部门工号姓名得分一：单选题：3分/题，共30分。

1.为了避免ESD破坏，一个接地工作台是 ( D )A.可以完全达到防护静电的破坏；B.很少用到；C.对安全有顾虑；D.防静电环境中的一环。

2. HBM模型是（ A ）A. 人体放电模型；B. 机器模型；C. 带电器件模型。

3.如果不控制ESD，后果将是：( D )A.较高的成本；B.较低的产品质量；C.不满意的顾客；D.以上所有。

4.在环境条件控制的工作区内，低湿度与静电的关系( A )A.非常有关系；B.完全无关；C.只有在冬天有关系；D.只在一些地点有关系。

5.佩戴防静电手环目的是为减少（ A ）对原材料.半成品及成品的损害，减少在线产品的维修量，提高产品质量A.静电；B.磕碰线路板；C.员工；D.随意走动。

6.正确戴静电环应该是 ( A )A.直接接触皮肤；B.戴在长袖衫袖子外；C.松绑于手腕；D.接触手腕部位皮肤清洗后戴上。

7.静电敏感器件不同类型的防护包装不包括（ D ）A.静电屏蔽材料；B.抗静电材料；C.静电消散材料；D.绝缘材料。

8.第四版ANSI/ESD S20.20-2021，于2021年（ C ）获得通过A.2月11日；B.8月4日；C.10月28日；D.7月11日。

9.防静电台垫，背面（导电）阻抗（ B ）A. 1*106—1*109Ω；B. 1*103—1*105Ω；C. 1*108—1*1010Ω；D. 1*108—1*1011Ω。

10.存储，搬运，使用贴片阻容类元器件过程中，要求使用（ B ）的相应包装物进行防护。

A.公司专用；B.厂家自带；C.塑料制成；D.金属制成。

二：多选题：4分/题，共20分。

1.静电的主要危害方式。

（ ABCD ）A.吸附尘埃；B.静电放电；C.静电感应；D.电磁干扰。

小学三年级上册英语第二单元期中试卷(答案和解释)英语试题一、综合题(本题有50小题，每小题2分，共100分.每小题不选、错误，均不给分)1.What is the color of a banana?A. RedB. YellowC. BlueD. Green2.Which of these is a toy?A. SpoonB. KnifeC. BallD. Chair3.What do we use to eat rice?A. KnifeB. ForkC. SpoonD. Plate4.What is the color of an apple?A. GreenB. RedC. OrangeD. Blue5.Which one is used for playing music?A. GuitarB. SpoonC. ChairD. Fork6.What do we use to open a door?A. SpoonB. KeyC. KnifeD. Plate7.What do we use to wash our hands?A. SoapB. KnifeC. ForkD. Plate8.Which one is used for eating?A. KnifeB. PlateC. SpoonD. Fork9.I love reading books. My favorite books are about ______. I enjoy reading stories about ______ animals and magical places. Sometimes, I also like to read books about______ heroes who go on adventures. After reading, I usually share the stories with my ______.10.What do you use to write on a notebook?A. PenB. RulerC. KnifeD. Cup11.Which of these is a day of the week?A. JanuaryB. TuesdayC. SummerD. December12.What is the first month of the year?A. DecemberB. JanuaryC. MarchD. November13.Which of these is a country?A. JapanB. SpoonC. PlateD. Chair14.Which of these is an animal?A. TableB. BirdC. SpoonD. Plate15.My father is a ___ .A. engineerB. engineer’sC. engineersD. engineering16.I like to _______ TV in the evening.A. watchB. lookC. seeD. read17.Which of these is a pet?A. DogB. PlateC. KnifeD. Spoon18.Your friend is sad because they lost their favorite toy. What would be a good way to help them feel better?A. Ignore them and continue playingB. Tell them that it’s just a toy and they shouldn’t be upsetC. Offer to help them look for the toy or find a solutionD. Laugh at them because they are upset19.Which of these is a musical instrument?A. PianoB. SpoonC. ChairD. Table20.What is the opposite of "hot"?A. ColdB. WarmC. SoftD. Heavy21.Which of these is used for sleeping?A. BedB. ChairC. PlateD. Spoon22.Which of these animals is the tallest?A. ElephantB. GiraffeC. TigerD. Lion23.Which animal is known for its ability to swim and live in the water?A. DogB. FishC. TigerD. Bird24.Which of these is a place where you go to learn?A. SchoolB. HospitalC. RestaurantD. Library25.My family likes to travel. Last summer, we went to the beach. The weather was __ and the sea was very blue. We swam in the ocean, built sandcastles, and collected seashells. In the evening, we watched the sunset and had a picnic on the beach. It was a wonderful trip.26.What is the opposite of "dark"?A. BrightB. HeavyC. ColdD. Fast27.I ______ (collect) stickers from different countries. Every time I ______ (travel) toa new place, I ______ (buy) a sticker to add to my collection. Last year, I ______ (go) to Japan, and I ______ (buy) several beautiful stickers. Now, I ______ (have) a big collection of stickers from around the world.28.Which one is a shape?A. CircleB. DogC. ChairD. Table29.Which one is a form of transportation?A. AppleB. AirplaneC. TreeD. House30.Which of these is a body part?A. FingerB. SpoonC. PlateD. Chair31.Which of these is a shape?A. SquareB. AppleC. CarD. Spoonst night, my family ______ (watch) a movie together. The movie ______ (be) about a young girl who ______ (travel) to space. We ______ (think) it ______ (be) veryexciting, and we all ______ (enjoy) it a lot. After the movie, we ______ (talk) about our favorite parts.33.Yesterday, I _______ (take) my dog to the park. We _______ (walk) around and _______ (play) fetch. My dog _______ (run) so fast that I _______ (laugh) a lot. After playing, we _______ (sit) on the grass and _______ (rest). It _______ (be) a fun time.34.What is the plural of “child”?A. ChildsB. ChildesC. ChildrenD. Childs’35.Which one is a shape?A. ChairB. CircleC. TableD. Car36.Which one is an animal?A. CatB. BookC. PenD. Cup37.Which of these is used to play music?A. GuitarB. PlateC. KnifeD. Spoon38.Which one is correct?A. She am happy.B. She are happy.C. She is happy.D. She happy.39.What do we use to drink water?A. KnifeB. SpoonC. CupD. Plate40.Which of these is a number?A. ChairB. FiveC. DogD. Car41.Which of these is a famous tower?A. Eiffel TowerB. SpoonC. PlateD. Chair42.How many fingers do you have?A. TenB. TwentyC. FiftyD. Thirty43.Which one is a fruit?A. CarrotB. BananaC. OnionD. Potato44.Which one is a body part?A. LegB. ChairC. PlateD. Table45.Which of the following is a fruit?A. TomatoB. CucumberC. CarrotD. Lettuce46.Which one is a body part?A. HandB. TableC. ChairD. Spoon47.What is the opposite of "hot"?A. WarmB. ColdC. HeavyD. Tall48.Which one is used for drinking?A. CupB. ForkC. KnifeD. Plate49.What is the opposite of "hot"?A. ColdB. WarmC. BigD. Tall50.What is the opposite of "hot"?A. ColdB. FastC. TallD. Happy(答案及解释)。

2020年中考试卷和答案重庆b卷**2020年中考试卷和答案重庆B卷**一、语文知识运用（共30分）1. 下列词语中加点字的读音完全正确的一项是（）。

（3分）A. 矗立（chù）哽咽（yàn）迸溅（bèng）恪尽职守（kè）B. 蹒跚（pán）喑哑（yīn）箴言（zhēn）踽踽独行（jǔ）C. 缄默（jiān）踌躇（chóu）拮据（jū）叱咤风云（zhà）D. 蹉跎（cuō）桎梏（gù）恣意（zì）栉风沐雨（zhì）答案：C2. 下列句子中没有语病的一项是（）。

（3分）A. 通过这次活动，使我们对环保有了更深的认识。

B. 重庆的夜景，以其灯火辉煌、色彩斑斓而闻名。

C. 为了防止不再发生类似事件，学校采取了严格的安全措施。

D. 他虽然年轻，但是工作经验丰富，深受同事们的敬重。

答案：B3. 填入下列横线处的词语，最恰当的一项是（）。

（3分）春天来了，小草从土里探出头来，好奇地打量着这个崭新的世界。

它们在风中摇曳，在阳光下______，尽情享受着大自然的恩赐。

A. 沐浴B. 沐浴着C. 沐浴了D. 沐浴过答案：B4. 下列句子中，加点成语使用正确的一项是（）。

（3分）A. 他虽然成绩优异，但总是不骄不躁，真是个谦谦君子。

B. 面对老师的批评，他竟然不以为然，真是让人哭笑不得。

C. 他虽然年纪轻轻，但已经著作等身，真是令人刮目相看。

D. 他总是喜欢独来独往，真是个孤芳自赏的人。

答案：A5. 根据语境，下列句子排序最恰当的一项是（）。

（3分）①然而，随着时间的推移，情况发生了变化。

②在很长一段时间里，人们普遍认为地球是宇宙的中心。

③哥白尼提出了日心说，挑战了传统的地心说。

④这一理论的提出，标志着人类对宇宙的认识进入了一个新的阶段。

A. ②①③④B. ②③①④C. ②④①③D. ③②①④答案：B6. 阅读下面的语段，完成（1）-（3）题。

小学上册英语第6单元真题试卷(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 ____ enjoys swimming and can often be seen in lakes.2.Which month comes before April?A. MarchB. FebruaryC. MayD. June答案:A3.I can decorate my ________ (玩具名称) however I want.4.She enjoys ________ (mentoring) young people.5.What is the name of the famous American national park known for its giant sequoias?A. Yosemite National ParkB. Yellowstone National ParkC. Sequoia National ParkD. Grand Canyon National Park答案: C. Sequoia National Park6.The __________ (历史的教育意义) shapes future leaders.7.I love ________ with my family.8.The _____ (rain) nourishes the soil.9.She sings _____ (beautifully).10.She is reading a ___. (magazine)11.The tree is _______ (covered) in snow.12.The __________ (自然灾害) require preparedness.13. A hamster can run for hours on its ______ (轮子).14. A _____ (水源) is necessary for plant survival.15.I have ___ (two/three) pets at home.16.My sister is my little _______ who brings joy.17.The flowers are ________ (美丽的).18.The bison roams the ____.19.The ocean is a source of ______ for many organisms.20.An exothermic reaction ______ energy to the surroundings.21.The ants work together to build a ______.22.The process of combining two or more elements to form a compound is called _______.23.She has a ___ of shoes. (pair)24.The __________ (贸易路线) were crucial for economic growth.25.My mom has a _____ (new/old) car.26. (Pledge) of Allegiance was written in the 19th century. The ____27.The process of changing a liquid to a gas is called __________.28.An element's atomic mass is the total number of ______.29.__________ energy is required to break chemical bonds.30.Certain plants can ______ (提供) food security.31. A black hole is a place in space where ______ cannot escape.32.The ______ (植物的物种多样性) is crucial for resilience.33.The discovery of penicillin was made by _____.34. A chemical reaction can be represented by a _____ equation.35.trial Revolution started in __________ (英国). The Iron36.The ________ has a long tail and likes to climb.37.My friend is always __________ (乐于助人的) when I need help.38.The rabbit has a cute ______ (鼻子).39.The _______ (小浣熊) washes its food before eating.40.I love ________ to music.41.The _______ (小金色) is a common pet for many families.42.What is your favorite __________?43.The __________ (历史的启发性思维) promote exploration.44.The chemical formula for ammonium sulfate is __________.45.I can ______ (画) a picture of my family.46.I watched a _______ (小蝴蝶) land on a flower.47.The seal swims gracefully in the ______ (水).48. A solid has a definite shape and __________.49.I have a toy ________ that can fly.50.I want to ___ a scientist. (become)51.The ______ (生态复苏) involves planting native plants.52.Who is famous for saying "I have a dream"?A. Albert EinsteinB. Martin Luther King Jr.C. Abraham LincolnD. Nelson Mandela答案: B53. A ____ enjoys swimming and is often seen in lakes.54.What is 6 x 7?A. 42B. 36C. 48D. 54答案:A55.My dad takes me to . (我爸爸带我去。

重庆市中考化学试卷（B卷）参考答案与试题解析一、选择题（本大题包括16个小题，每小题2分，共32分）每小题只有一个选项符合题意。

1．（2分）“构建生命共同体”体现人与自然和谐共生。

下列说法与该理念不相符的是（）A．全民义务植树活动B．大肆开采矿物资源C．生活废水处理排放D．长江流域十年禁渔【解析】解：A、义务植树能保护环境，故不合题意；B、大肆开采矿物资源会造成资源的浪费，且破坏环境，故符合题意；C、生活废水处理排放可以防止水体污染，故不合题意；D、长江流域十年禁渔有利于保护生态平衡，故不合题意。

故选：B。

2．（2分）成语蕴含丰富的中华文化。

下列成语的本义一定体现化学变化的是（）A．盲人摸象B．南辕北辙C．火中取栗D．绳锯木断【解析】解：A.盲人摸象，没有新物质生成，属于物理变化，故A错误；B.南辕北辙，没有新物质生成，属于物理变化，故B错误；C.火中取栗，发生了燃烧，有新物质生成，属于化学变化，故C正确；D.绳锯木断，没有新物质生成，属于物理变化，故D错误。

故选：C。

3．（2分）安全是化学实验成功的保障。

下列操作安全的是（）A．B．C．D．【解析】解：A、稀释浓硫酸时，要把浓硫酸缓缓地沿器壁注入水中，同时用玻璃棒不断搅拌，以使热量及时的扩散；一定不能把水注入浓硫酸中，以防止酸液飞溅；图中所示操作错误。

B、闻气体的气味时，应用手在瓶口轻轻的扇动，使极少量的气体飘进鼻子中，不能将鼻子凑到集气瓶口去闻气体的气味，图中所示操作正确。

C、给试管中的液体加热时，用酒精灯的外焰加热试管里的液体，且液体体积不能超过试管容积的三分之一，图中液体超过试管容积的三分之一、大拇指不能放在短柄上，图中所示操作错误。

D、使用酒精灯时要注意“两查、两禁、一不可”，禁止用酒精灯去引燃另一只酒精灯，图中所示操作错误。

故选：B。

4．（2分）食品包装袋内常放有内装铁粉和生石灰的小包。

下列空气成分一定不能与它们反应的是（）A．N2B．O2C．H2O D．CO2【解析】解：A、铁粉和生石灰均不与氮气反应，故A符合题意；B、铁在与氧气、水同时共存时会发生锈蚀，因此氧气能与铁粉反应，故B不合题意；C、铁在与氧气、水同时共存时会发生锈蚀；生石灰能与水反应生成熟石灰，故C不合题意；D、生石灰与水反应生成熟石灰，熟石灰与二氧化碳反应生成碳酸钙和水，故D不合题意。

试卷B及答案武汉工业学院2007–2008学年第1学期期末考试试卷（B卷）一、填空题（计30分，每小题2分）1、食品分析的一般程序为（）。

2、粮食的伪劣表现在哪些方面（）。

3、采样一般分三个步骤进行，分别得到的样品为（）。

4、分析柑橘类果实及其制品时，用（）酸表示，K=0.064，K是换算为主要酸的系数，即指（）。

5、在进行比色分析中，为了减少误差，样品的量应该控制适宜的范围，使吸光度在（）范围内较为合适。

6、评分检验法是指（）。

7、感官分析按方法性质可分为（）三类？8、食品中的总酸度是指（）。

9、对于颜色深的食品，测定其酸度的方法有（）。

10、对于含磷脂较多的鱼、贝、肉、蛋等，测定其脂肪含量可采用的方法是（）。

11、测定痕量水分的食品中的水分含量的方法是（）。

12、在测定磷酸盐含量比较高的食品的灰分时，为了使灰化完全，可采取的措施有（）。

13、测定液状乳、乳制品的脂肪含量的测定方法名称有（）。

14、已知有完整包装的样品128件，采样的件数应为（）件。

15、测定黄曲霉毒素B1可以使用的方法有（）。

二、是非题（计10分，每小题1分，对了打√，错了打×）1、已知测定面粉样品中蛋白质含量的数据如下：12.56%、12.62%、11.32%、12.64%、12.65%。

取置信度90%，Q0.90=0.64，则11.32%不是离群值，应该保留。

（）2、在测定冰淇淋膨胀率时，加入乙醚的体积为2.0ml，滴加蒸馏水的体积为22.0ml，则冰淇淋膨胀率为92.3%。

（）3、测定食品中的钾、钠含量时，不能用原子发射光谱法测定。

（）4、有机氯农药残留量的测定可用高效液相色谱法。

（）5、感觉相乘现象是当两种或两种以上刺激同时作用于感官时，而降低了其中一种刺激的强度或使该刺激发生改变的现象。

（）6、用原子吸收分光光度法可以测定有机磷农药残留量。

（）7、用高效液相色谱法测定食品中的VA、VD、VE时，根据色谱图以保留时间定性，以峰高、峰面积定量。