WORD第一节复习题2
人教版新目标八年级(上)期末综合复习—阅读专练(精编word版 带答案)(2)
2021-2022年人教版八年级（上）期末综合复习—阅读专练Name_________ Grade_________ 第一节短文理解。
根据短文内容，从每题所给的A、B、C、D四个选项中选出最佳答案。
AParents always want the best for their kids. But everyone has their own way of parenting(养育). Here are some popular parenting styles. Which one do you like best?( )1. If you have helicopter parents, you may _____.A. get less freedomB. face more difficultiesC. worry about your parentsD. "fly" over your parents like helicopters ( )2. As lawnmower parents, they will ______.A. cut grass before their kidsB. get rid of all difficulties for their kidsC. make sure their kids are happy and healthyD. ask their kids to work out problems on their own( )3. What's the best title for the passage?A. Kids and parentsB. How parents get on with kidsC. Everyone has their own parentsD. Different ways of parentingBA number of years ago, a man went to visit a circus(马戏团)in New York. He was able to walk around looking at the lions, monkeys, bears and other circus animals. As he was passing the elephants, he suddenly stopped. He found that these huge elephants were being held by only a small rope tied to their front leg. No chains, no cages. It was clear that the elephants could, at any time, break away from their ropes but for some reason, they did not.He saw a trainer nearby and asked why these animals just stood there and didn't try to get away. "Well,” the trainer said, "when they are ve ry young and much smaller, we use the same size rope to tie them and, at that age, it's enough to hold them. As they grow up, they still believe they can not break away. They believe the rope can hold them, so they never try to break free.”“How could it b e?" said the man. These animals could at any time break free from ropes. But because they were always stuck right where they were, they believed they couldn't.Just like the poor elephants, how many of us go through life believing that we can not do something, just because we failed at it once before?Failing is part of learning.( )4. What does the underlined phrase "break away" mean?A. 击败B. 打破C. 挣脱D. 折断( )5. How were the elephants held?A. By a strong rope.B. In cagesC. With chains.D. By a small rope. ( )6. Which of the following is NOT true?A. The elephants were held in this way when they were young.B. There were many kinds of animals in the circus.C. The animals were trained to perform.D. The elephants often escaped.( )7. What can we learn from the passage?A. Well begun is half done.B. The early bird catches the worm.C. We should never give up.D. One tree can't make a forest.CAre you good with money? Do you get pocket money from your parents or do you work to make money? Read on to find out about British teenagers and their money!Pocket money：Most teenagers in Britain receive pocket money from their parents.They might have to do some housework to get pocket money, including cleaning, cooking, washing dishes and so on.Part-time work：A part-time job is a choice for teenagers who don’t have pocket money or who want to get extra money. About 15% teenagers have a job. Only children over the age of 13 can work. Popular part-time jobs for teens include babysitting, delivering newspapers, restaurant work and shop work. Children in Britain can work two hours a day at the most on a school day but not during school hours. During weekends and school holidays, they can work longer hours. Bank accounts(账户)：Some children and teenagers have a bank account. There is no age limit at which you can open a bank account, but a bank manager can decide whether to open an account for a child or a young person. Parents can put pocket money directly into their child’s bank account. Most banks have a prepaid bank card designed for young people.Mobile apps：Many companies have made mobile apps for children, including GoHenry, Osper and Gimi. Parents can add money to their children’s accounts and check to see how the money is spent. Children can choose to save their money or spend it using a card. The apps suggest that kids from 8 to 13 can use the cards.So, many teenagers are getting experience working part-time, dealing with banks and deciding whether to save or spend their money. These are all steps towards becoming a financially(经济的) independent person and making and looking after your own money. ( )8. How can British teenagers get their pocket money?A. By doing homework.B. By doing housework.C. By opening accounts.D. By using mobile apps.( )9. To get extra money, British teenagers over 13 can________.A. work in shops two hours a day during weekendsB. help to take care of babies during school hoursC. deliver newspapers for three hours on school daysD. work in restaurants every day as long as they wish( )10. What does the author think of the bank accounts and mobile apps for children?A. They may help parents save their children’s money.B. They may help kids learn to look after their money.C. They might prevent children getting extra money.D. They might get kids used to spending extra money.( )11.What is the passage mainly about?A. How to get along well with the bank managers.B. How to deal with bank accounts and mobile apps.C. How British teenagers work part-time to make money.D. How British teenagers make and manage their money.DA well-known speaker started his speech by holding up a $20 bill. In the room of 200 people, he asked, “Who would like this $ 20 bill?”Hands started going up. He said, “I am go ing to give this $20 to one of you. But first let me do this.” He crumpled(揉搓) the bill. He then asked, “Who still wants it?” Still, the hands of stayed in the air.“Well,” he replied, “What if I do this?” He dropped it on the ground and started to grind(碾压) it into the floor with his shoe. He picked it up, now crumpled and dirty. “Who still wants it?” The hands did not move.“My friends, you have all learned a very valuable lesson. No matter what I do to the money, you will still want it because it is stil l worth $20.”“Sometimes we feel like we are worthless because we did something wrong or the situation is not good. But no matter what has happened, you will never lose your value and you are still priceless to those who love you. They care about you becau se you are special to them.”“The worth of our lives comes not in what we do or who we know, but by who we are.”( )12. How did the speaker start his speech?A. By hiding a $20 bill.B. By passing a $20 bill.C. By borrowing a $20 bill.D. By holding up a $20 bill.( )13. The speaker put the bill high up in the air because he wanted to _________.A. change the value of the billB. get more listeners to look at the billC. make the listeners feel sorry for the billD. show the listeners that the bill was worthless( )14. It’s clear that _________.A. no one wanted the billB. the speech was not interestingC. the speaker didn’t like moneyD. the speaker was good at making a speech ( )15. What did the speaker want to tell people with his speech?A. Keep cool when there is a problem.B. It doesn’t matter if you lose your value.C. The value of our lives lies in who we are.D. Money is not the most important thing in life.ERunning is becoming popular these days. Many of us run for health. Doctors say many health problems come from these bad habits：eating and drinking too much, smoking and not taking enough exercise. Doctors tell us, “Eat and drink less, don’t smoke, and exercise more.”Running is a good form of exercise because it helps build a strong heart. It also helps most people lose weight. One 68-year-old woman runs three times a week. “I love to eat,” she says. She runs to lose weight.Running is good for health in other ways, too. Many runners say running keeps colds and other small health problems away. “Running is my doctor, ” says one man.Running can also help people to relax. So today men and women of all ages enjoy running. ( )16.Many people enjoy running because they want to________ .A.become popularB.keep healthyC.run fastD.eat much ( )17.The third paragraph shows_________.A.running helps people to relaxB.people who like running have many health problemsC.running helps build a strong heartD.people who like running have fewer health problems( )18.The writer mainly tells us________.A.how to runB.how to lose weightC.running is a good way to keep healthyD.running is better than doctorsFI did something wrong today.While at the beach this afternoon, I met a boy called Bob. We talked a lot. He said that it was fun playing on the cliffs. I told him that I was not allowed to go near that place. Mum and Dad had always told me it was dangerous to play there. He called me a coward. I wanted to prove to him that I was just as brave, so I agreed to go with him.We wanted to make our way down to explore the area, so Bob started to climb down and I followed him. Unluckily, some rocks came down after us. One of them nearly hit my head. We could not get back up. We shouted and shouted for help, but for a long time no help came. I was really scared. I wanted to cry. Then, we heard some sounds. Someone had heard us. A woman tied a rope around herself while a man at the cliff top held the rope. She made her way down to save us.My parents were relieved that I was unhurt, but they were angry that I had done such a risky thing. I apologized and promised that I would not do anything like that again.( )19. Where did the writer meet Bob?A. At school.B. In the park.C. At the beach.D. On the cliffs. ( )20. What had the writer's parents always warned him about?A. The wind was very strong.B. The beach was too far away.C. The cliffs were not safe places.D. Bob was difficult to get on with.( )21. Put the sentences in the right order according to the passage.a. Some rocks came downb. The writer followed Bobc. The writer wanted to cry.d. A man and a woman saved theme. The writer and Bob heard some soundsA. a-b-c-d-eB. b-a-c-e-dC. a-c-b-e-dD. b-e-a-c-d ( )22.How did the writer feel about what he had done?A. Surprised.B. ExcitedC. GladD. SorryGSore necks are very common these days. How to avoid a sore neck? Here are the things you should know.●Take precautions after an unusual activity. Many people report having a pain in their necks after doing something that they don't often do, such as a new exercise or packing and moving.●If you know you've done something that puts you at risk, massage your neck, do some relaxation exercises and take a warm bath before bed.● Make sure your workstation is correct. If you work long hours at a desk, you may wa nt to make sure that your work environment Is set up to be the most relaxing. Make sure that your body is being treated right. Keep your feet on the floor. This will often depend on how high your chair is, so adjust it in time to achieve good results.● Ch ange your posture often. Sitting in one position for long periods of time is not healthy. Sit with your back straight for most of the time. Take a 5-minute break if you can and walk around every hour.● Exercise. Find something-swimming, running or climbing that makes you excited and feel alive. Make it into a usual way. Your body will feel better and your mind will feel more relaxed.( )23. After doing something unusual, you can’t ______ according to the passage.A. massage your neckB. do some relaxation exercisesC. take a warm bath before bedD. look at your phone for too long( )24. The underlined word " posture" probably means “______”.A.姿势B.方向C.方式D.状态( )25. ______ can avoid a sore neck according to the passage.A. Making your work environment be quiet.B. Sitting with your back straight for a moment.C. Packing and moving for a long time.D. Exercising often like swimming or running.( )26. This passage mainly tells us ______.A. how to do exercise wellB. exercising often is good for peopleC. how to avoid a sore neckD. being healthy is the most importantHSometimes it may seem difficult to improve our health. If so, the following health habits may help you.● Eat breakfast every morning.Studies show that if you eat a meal in the morning you may not become too fat or eat too much during lunch. Eating breakfast can help people feel better through the day.● Get enough sleep.Poor sleep can influence our memory and learning. It can also cause traffic accidents! Studies show that people who don’t get enough sleep seem to get into more accidents. So get enough sleep and stay safe.● Take a walk every day.Walking is an easy way to exercise. You'd better meet friends for a walk not for a meal. As you walk you will see the beautiful world around you Once you try, you will find that adding a walk into your daily life is very easy.● Join social groupsSocial groups might include sports teams, art or music groups. People in the groups can offer advice and help each other in difficult times. Also, being in a group keeps your mind active. An active mind is a healthy mind.● Have a hobby.A hobby could be running, reading or making something with your hands Hobbies help people to relax. Hobbies bring people happiness as well.( )27.What should you do if you want to have a good memory and learn better?A. Eat breakfast every morning.B. Have a good sleep.C. Take a walk every day.D. Join a social group.( )28.If you become a member of a social group, you can _______ .A. walk with friends every dayB. get into fewer accidentsC. get advice and help othersD. have more hobbies( )29.Which of the following is TRUE?A. If you have breakfast every morning, you'll be fat.B. All the traffic accidents are caused by poor sleep.C. To join a social group helps you have a healthy mind.D. Having a hobby is the best way to relax.( )30.What does the passage mainly talk about?A. Ways to improve health.B. Reasons for keeping healthy.C. Ways to develop good habits.D. Breakfast and exercise.INobody likes to do chores, especially kids. How can you make your kids get into a good habit of doing their chores? Try making chores fun for them.Play some music: Music makes everything seem like a party, doesn’t it? Play your kids’ favorite music and let them dance around while they are doing their chores.Make it a treasure hunt: It’s a good way when you would like them to clean the house. Let them know that you hide a $5 bill someplace. If they find it, they can keep it.Change often: If your kids keep doing the same chores for months, they may feel bored. Teaching them a new task is fun for both you and the kids. They will feel more grown up when they get a new task.Do it together: It’s never fun to be the only one working and watching everyone else relaxing.If everyone takes part in doing chores, you will finish them faster and have more fun. ( )31. The article is for .A. schoolsB. teachersC. parentsD. kids( )32. The writer thinks it’s better to while asking kids to clean the house.A. play their favorite musicB. hide something for them to findC. give them a new taskD. do it together with them( )33. Which is the best title of the article?A. Doing chores is good for kidsB. Help kids set a good habitC. Make chores fun for kidsD. Everyone should do choresJI walked into a restaurant and ordered some food. After about 20 minutes a large group of people came in and took their own orders.I felt disappointed(失望的) because the group got served before me. I watched as they began to eat and laugh loudly. I heard one of them bragging (吹嘘) about how he knew someone who worked at the restaurant. Unable to stand it anymore, I decided to leave. I asked the waiter to cancel my order angrily.He told me nicely, "Yours is a special order. The head chief is preparing it himself. It'll take a little more time. Please have a drink while you wait.”I calmed down and waited patiently(耐心地). a few minutes later, my meal was served by six waiters.To my surprise, the owner of the restaurant was a long-lost friend of mine. He saw me walking in and decided to surprise me. He turned my simple meal into a five-star meal for free. The people at the other table were shocked and couldn't stop looking at me. They asked angrily why they didn’t get that kind of service.Such is life! Some people go ahead of you, laughing at you and talking about how they are smarter, better and luckier than you, while you are working hard day and night, wondering why it's taking so long for you to get reward(奖励) like them.You just have to wait longer because your reward is more special.( )34. Why did the writer feel disappointed at first？A. Because the group got served before him.B. Because the group had special service.C. Because the waiter canceled his order.D. Because the meal tasted really terrible. ( )35. The underlined word "He" in Paragraph 5 refers to “______”.A. The head chefB. The waiter of the restaurantC. One guest of the groupD. The owner of the restaurant( )36. How did the writer feel through the whole story？A. shocked; unhappyB. bored; gladC. angry; surprisedD. lucky; excited ( )37. Which of the following might be the best title for the passage？A. Meet my long-lost friend again.B. Wait patiently for a rewarding life.C. Have an unhappy experience.D. Laugh at other unlucky guests.KMany kids do housework such as doing the dishes, making the bed, and folding the clothes.In exchange, they get some money or other computer time.Paying kids for housework is one of the most popular topics，especially at a time when everyone is more careful about money.Some parents think since adults are paid to do their jobs, we should pay kids for everyday housework.But some people don't think kids should get rewards(报酬)for doing housework.Susie Walton, an expert，believes that by rewarding kids, parents are sending a message that work isn't worth doing unless you get something in return.“Running any kind of housework is a team effort, ” Walton said.“A home is a living space for everyone in the family.It's important for kids to see that we all have responsibilities in the house, and families decide how they want their home to look, and how they are going to keep it looking like what they want.”Other people believe that getting a reward encourages kids to do housework, and it also teaches them real world lessons about how we need to work to get money.There are also apps that give kids points and digital gifts that can be redeemed either online or in the real world.“Our goal is to give kids lawful power so they can get rewards,” says Chris Bergman.“And kids need rewards to help encourage themselves.”( )38.Which of the following housework is NOT mentioned in Paragraph 1?A.Washing the dishes.B.Cooking meals.C.Folding the clothes.D.Making the bed.( )39.What's Walton's idea in the passage?A.Running exercise is a kind of team work.B.People work to get some rewards.C.Kids have responsibilities in the house.D.Doing the housework is only the parents' job.( )40.According to Chris Bergman, kids should be encouraged to ______．A.do housework without rewardsB.do more houseworkC.stay away from houseworkD.do housework by getting rewards( )41.Which is the best title for the passage?A.Kids Should Study as Well as Doing HouseworkB.Let Children Do Some HouseworkC.Should Kids Be Rewarded for Doing HouseworkD.Doing Housework Is Good for Children's StudyLMany kids help their parents to do chores such as washing the dishes cleaning the floors and taking out the rubbish in the house. And some kids get money or other rewards from their parents, such as playing computer games for 20 minutes.But some people do not think that kids should get rewards for doing chores. One of them is Susie Walton, a parenting educator. She believes that if kids get rewards, they will think that work isn't worth(值得) doing unless they can get something. For example, kids won’t sweep the floor if they see it is dirty. But they will clean the floor if their parents reward them for it. Susie said, "A home is a living place for everyone in the family. It's important for kids to see that it's all families job to keep their homes clean.”Other people have different opinions. They believe that money or other rewards can encourage kids to do more chores. It also teaches them real world lessons that we need to work to make money. Now, there are also apps that encourage kids to do chores. The apps give kids points and gifts that can be used either online or in the real world. With the Chore Monster app, kids get points after doing chores. Kids can exchange their points for real rewards, such as time to play video games or a trip to the mall.What do you think? Should kids be rewarded for doing chores? Or should kids help outwith their homes without getting anything?( )42. How does the writer start the passage？A. By giving some facts.B. By giving some opinions.C. By using a teacher’s words.D. By showing his own experiences.( )43. Which of the following is Susie Walton's opinion？A. Don’t ask kids to do housework.B. Don't reward kids for doing anything.C. Don’t give kids rewards for doing chores.D. Don' t let kids play computer games. ( )44. What's Paragraph 3 mainly about？A. How to make money by doing chores.B. The apps that encourage kids to do chores.C. How to exchange the points for real rewards.D. The good side of rewarding kids for doing chores.( )45. Where does the passage probably come from？A. A dictionary.B. A storybook.C. A magazineD. A guidebook2021-2022年人教版八年级（上）期末综合复习—阅读专练参考答案第一节短文理解。
高中化学《选择性必修1化学反应原理》课后习题word第一节 第1课时 化学反应速率
第二章化学反应速率与化学平衡第一节化学反应速率第1课时化学反应速率A级必备知识基础练1.下列对化学反应速率的说法不正确的是()A.反应速率用于衡量化学反应进行的快慢B.通常不用固体或纯液体表示化学反应速率C.同一化学反应中,各物质表示的反应速率之比等于各物质的化学计量数之比D.速率的大小与参加反应的物质的量有关2.下列四个数据都表示合成氨的反应速率,其中能代表是同一反应的是()①v(N2)=0.3 mol·L-1·min-1②v(NH3)=0.9 mol·L-1·min-1③v(H2)=0.6 mol·L-1·min-1④v(H2)=0.022 5 mol·L-1·s-1A.①②B.①③C.③④D.②④3.把0.6 mol X气体和0.4 mol Y气体混合于2 L的容器中,发生反应3X(g)+Y(g)n Z(g)+2W(g),5 min末生成0.2 mol W。
若测知以Z浓度变化来表示的反应速率为0.01 mol·L-1·min-1,上述反应中Z 气体的化学计量数n的值是()A.1B.2C.3D.44.在一个10 L的密闭容器中,发生反应:H2(g)+I2(g)2HI(g),起始加入H2的物质的量为2 mol,I2的物质的量为5 mol,5 s后,HI的物质的量为0.5 mol,则这5 s内H2的反应速率为()A.0.04 mol·L-1·s-1B.0.005 mol·L-1·s-1C.0.01 mol·L-1·s-1D.0.1 mol·L-1·s-15.已知某条件下,合成氨反应中不同时刻各物质的浓度如下:N2(g)+3H2(g)2NH3(g)初始浓度1.0 3.0 0.2(mol·L-1)2s末浓度0.6 1.8 1.0(mol·L-1)4s末浓度0.4 1.2 1.4(mol·L-1)当用氨气浓度的增加来表示该反应的速率时,下列说法错误的是()A.2 s末时用氨气的浓度变化表示的反应速率为0.4 mol·L-1·s-1B.前2 s内用氨气的浓度变化表示的反应速率为0.4 mol·L-1·s-1C.前4 s内用氨气的浓度变化表示的反应速率为0.3 mol·L-1·s-1D.2~4 s内用氨气的浓度变化表示的反应速率为0.2 mol·L-1·s-16.某温度下,浓度均为2 mol·L-1的两种气体X2和Y2在恒容密闭容器中发生反应生成气体Z,经过t min后,测得各物质的浓度分别为c(X2)=0.8 mol·L-1,c(Y2)=1.6 mol·L-1,c(Z)=0.8 mol·L-1,则该反应的化学方程式可表示为()A.3X2(g)+Y2(g)2X3Y(g)B.2X2(g)+Y2(g)2X2Y(g)C.X2(g)+4Y2(g)2XY4(g)D.2X2(g)+3Y2(g)2X2Y3(g)7.在反应A2B中,A、B的浓度变化如图所示,则2 min内的平均反应速率为()A.v(A)=9 mol·L-1·min-1B.v(A)=4.5 mol·L-1·s-1C.v(B)=18 mol·L-1·min-1D.v(B)=9 mol·L-1·min-18.在2 L密闭容器中进行反应:m X(g)+n Y(g)p Z(g)+q Q(g),式中m、n、p、q为该反应的各物质化学计量数。
第一节DNA是遗传物质第二课时 Microsoft Word 文档 (2)
班级：姓名：层次：3.1 DNA是主要的遗传物质导学案（第二课时）编写：史小棉审核：高一生物组寄语：往前走，决不能把命运的纤绳，拴在青春的幻想上。
学习目标：理解DNA是主要的遗传物质学习过程：思考：是不是所有生物都含有DNA？四、生物体的遗传物质⒈RNA是遗传物质的证据⑴提取烟草花叶病毒的__ __不能使烟草感染病毒；⑵提取烟草花叶病毒的__ __能使烟草感染病毒。
⒉DNA是主要的遗传物质⑴绝大多数生物的遗传物质是________；⑵极少数生物的遗传物质是________。
通过烟草花叶病毒感染烟草实例，说明RNA也是遗传物质。
结论：因为绝大多数生物的遗传物质是，所以说DNA是的遗传物质。
四、习题巩固1（A）、在原核生物中DNA位于：A细胞核B核糖体C细胞质D蛋白质2（A）．下列关于噬菌体侵染细菌实验的叙述中，哪一项是正确的（）A、它是证明DNA是遗传物质的直接证据B、它是由艾弗里完成的C、它是为了验证蛋白质是不是遗传物质而设计的D、它是为了研究噬菌体增殖而设计的实验方案。
3（A）．关于病毒遗传物质的叙述中，下列哪项是正确的（）A、都是DNAB、都是RNAC、同时存在DNA和RNAD、有的是DNA，有的是RNA4（B）．用噬菌体去感染体内含有32P的细菌，在细菌解体后含32P的是（）A．子代噬菌体DNA B．子代噬菌体蛋白质外壳C．子代噬菌体所有部分D．子代噬菌体不含32P5（B）．用甲种病毒的RNA与乙种病毒的蛋白质外壳组装成一种病毒丙，以病毒丙侵染宿主细胞，宿主细胞中产生大量子代病毒，子代病毒具有的特征是（）A．甲种病毒的特征B．乙种病毒的特征C．丙种病毒的特征D．都不是6（A）．格里菲思的肺炎双球菌转化实验证明了（）A．DNA是遗传物质B．RNA是遗传物质C．蛋白质不是遗传物质D．加热杀死的S型菌中含有“转化因子”7(A )．艾弗里及其同事研究肺炎双球菌的方法是（）A．杂交实验法B．同位素标记法C．病毒侵染法D．单独直接观察不同成分的作用8(B)．为研究噬菌体侵染细菌的详细过程，你如何选择同位素标记的方案（）A．用14C或3H培养噬菌体，再去侵染细菌B．用180或15N培养噬菌体，再去侵染细菌C．将一组噬菌体用32P和35s标记D．一组用32P标记DNA，另一组用35S标记蛋白质外壳9(A)．噬菌体侵染细菌的实验证明（）A．RNA是遗传物质B．DNA是遗传物质C．蛋白质是遗传物质D．多糖是遗传物质10(B)．噬菌体的各种性状能传递给后代是通过（）A．噬菌体的DNA B．细菌的DNAC．噬菌体的蛋白质D．细菌的核糖体11(B)．四种脱氧核苷酸的不同取决于（）A．五碳糖的种类 B．碱基的种类 C．磷酸分子的多少 D．碱基的排列顺序12(B)、肺炎双球菌转化实验中，将无毒的R型活细菌和被加热死的有毒S型细菌混合后，注射到小鼠体内，在小鼠体内可以找到的细菌类型是（）A．有毒S型 B．有毒S型和无毒R型 C．有毒R型和无毒S型 D．无毒R型噬菌体侵染细菌的实验过程的叙述错误的是（）13(C)、关于T2A．用放射性同位素32P 标记噬菌体的DNAB．用放射性同位素35S标记噬菌体的蛋白质C．用35S 标记的蛋白质去侵染细菌，细菌内有了放射性D．用32P 标记的DNA去侵染细菌，细菌内有了放射性14(C)、在证明DNA是遗传物质的几个著名经典实验中，在实验设计思路中最关键的是（）A．要用同位素标记DNA和蛋白质 B．要分离DNA和蛋白质C．要区分DNA和蛋白质，单独观察它们的作用 D．要得到噬菌体和肺炎双球菌15(B)、DNA是主要的遗传物质是指（）A．遗传物质的主要载体是染色体 B．大多数生物的遗传物质是DNAC．细胞中的DNA大多在染色体上 D．染色体在遗传上有重要作用16(C)．1944年，美国科学家艾弗里和他的同事，从S型活细菌中提取了DNA、蛋白质和多糖等物质，然后将他们分别加入培养R型细菌的培养基中，结果发现加入DNA的培养基中，R型细菌转化成了S型细菌，而加入蛋白质、多糖等物质的培养基中，R型细菌不能发生这种转化。
(word完整版)八年级物理上册第一章第一节-强化训练练习题
一、时间的估测1．下面各事件的过程经历的时间最接近1秒钟的是（）A．人的眼睛迅速一眨 B．人心脉跳动一次 C．人正常呼吸一次 D．人打一次哈欠2．一块橡皮从桌上落到地面所用的时间均为（）A．0.5s B．2s C．3s D．5s3．下列时间段与1min最接近的是（）A．百米赛跑所用的时间 B．成年人吃一顿饭的时间 C．步行80 m所用的时间 D．正常人呼吸一次的时间4．周期性的运动都可作为测量时间的标准．下列哪项运动是不可以作为测量时间的（）A．人的脉搏 B．日出日落 C．地球绕太阳公转 D．人的生长5．一寸光阴一寸金，寸金难买寸光阴．对1min时间的长短，小翔同学描述正确的是（）A．中学生用较快的速度读书，1min时间只能读50个字 B．健康人的脉搏，1min时间跳动70次左右 C．人们呼、吸气5次所用的时间通常是1min D．中学生骑自行车上学，1min时间正常能骑行600m6．坐在温馨的物理考场，上体育课时你跑100m所需时间约为16 ．（填上合适的物理量单位）．7．小黄测得自己每分种的脉动次数为70次，他用脉搏作为计时工具，测得从跑道的一端走到另一端的脉动次数是140 次，则他用的时间约为秒．二、时间的测量1．在国际单位制中，时间的主单位是（）A．日 B．小时 C．分 D．秒2．走时准确的指针式手表的秒针，一昼夜内秒针转过的圈数是（）A．24 B．1440 C．86400 D．432003．下列专门用来测定时间间隔的工具是（）A．钟 B．表 C．停表 D．闹钟4．一个石英钟的分针转1圈，则它的秒针转（）A．5圈 B．60圈 C．100圈 D．3600圈5．地球自转一周所用的时间，我们称为（）A．一夜 B．一月 C．一天 D．一星期6．如图所示的秒表记录的时间是（）A．2min10s B．34s C．1min34s D．4min1s7．根据图，不用测算而可以直接得到的物理量是（）A．长度 B．速度 C．质量 D．时间间隔8．如图所示的工具中，不能用来测量时间的是（）A． B． C． D．10．生活中的机械摆钟，都是根据其摆完成一次摆动的相等的原理制成的．11．小刚从广州到深圳，乘座上午10时30分的汽车从广州准时出发，到深圳是上午12时42分，那么他所用的时间是 h= min．12．停表的示数如图所示，分别读出停表所示的时间为 min s．三、长度的估测1．我国1元硬币的直径最接近于（）A．2nm B．2mm C．2cm D．2dm2．小妍家新买了型号为20cm的台州产“苏泊尔”压力锅（俗称高压锅）．妈妈说，家用压力锅有18cm、20cm和22cm等型号．“型号20cm”指（）A．锅身的直径是20cm B．锅身的周长是20cm C．锅身的截面积是20cm D．锅的容积是20cm 3．下列记录结果中，用厘米做单位的是（）A．一支铅笔的长度约为18 B．教室的宽度约为60 C．小明的身高约为1.68 D．一张物理试卷的厚度约为704．一支未使用过的2B铅笔的长度最接近于（）A．10cm B．20cm C．30cm D．40cm5．身高160cm的小明，利用自己的身体特征进行了以下估测，接近真实值的是（）A．教室宽5臂展，约8m（臂展：两臂左右平伸时，两手中指尖之间的距离）B．教室长10步幅，约30m（步幅：走路时，两脚尖之间的距离）C．课桌长4拃，约2.8m（拃：张开手，拇指尖到中指尖之间的距离） D．物理课本厚1指宽，约10cm 6．你身体上最接近l5mm长度的是（）A．肩膀的宽度 B．拇指的长度 C．大拇指指甲的宽度 D．头发丝的直径7．新生婴儿的身高最接近（）A．5nm B．5cm C．5dm D．5m8． 2001年第47届世乒赛，国际乒联做出重大改革；为了增加乒乓球的可观赏性．将乒乓球改为“大球”这里所说的“大球”是把乒乓球的直径增加了（）A．2cm B．2mm C．2um D．2dm9．下列物品的尺度，最接近15cm的是（）A．橡皮的宽度 B．课桌的高度 C．文具盒的厚度 D．圆珠笔的长度10． 2005年5月22日，中国重测珠峰高度的登山队队员成功登上了珠峰的顶峰．据权威科学家预测，此次测量结果将高于以前所知的珠峰高度8848.13 （填写合适的长度单位）．11．我国最长的河流长江长约6400 ．（补上单位）12．一位同学用刻度尺测得初中物理第二册课本的长度是25.79 （补上单位）．四、长度的测量1．测得一块木板的长度为1.985m，可知测量用的刻度尺的最小分度是（）A．1dm B．1cm C．1mm D．1m2．一个同学用毫米刻度尺测一本物理书的长度，以下记录的测量结果正确的是（）A．2.58dm B．25.82cm C．0.258m D．258mm3．长度测量是物理学中最基本的测量之一，图中的四种工具不能用于测量长度的是（）A．刻度尺 B．螺旋测微器 C．游标卡尺 D．石英钟4．小明和小聪使用同一刻度尺，分别对同一物体的长度进行测量，两位同学的操作均规范，小明得到的结果是1.86dm，小聪的测量结果不可能是（）A．0．l86m B．0.187m C．18.61cm D．18.5cm5．某同学用分度值是mm的刻度尺对某一物体长度测量了四次，其中测量记录错误的是（）A．13.62cm B．13.61cm C．13.63cm D．13.90cm6．李明用同一刻度尺对一物体测量了四次，结果记录如下：l．58cm、1.57cm、1.59cm、1.60cm，物体的真实长度更接近下列哪个数据（）A．1.58cm B．1.59cm C．1.585cm D．1.60cm7．小宇为测手掌的长度，应选用的刻度尺是（）A．量程1m，分度值1cm B．量程1m，分度值1dm C．量程30cm，分度值1cm D．量程30cm，分度值1mm 8．一个同学测量一圆形金属板的直径，三次测得的数值分别为1.41cm、1.43cm、141cm，则金属板的直径是（）A．1.41cm B．1.43cm C．1.42cm D．1.426cm9．小明用同一刻度尺测量一枝铅笔的长度，三次测得的数值分别是12.43cm、12.45cm、12.44cm，以下哪一值更接近真实值（）A．12.4cm B．12cm C．12.44cm D．12.45cm10．在下列横线上合适的单位或数字：①2012年6月4日，在国际田联钻石联赛尤金钻的男子110米跨栏比赛中，刘翔跑出世界纪12.87 ；②小张同学的身高是1.65 ；③如图中铅笔的长度是 cm．11．用下图所示的刻度尺测量铅笔的长度，该刻度尺的分度值为，所测铅笔的长度为．12．测量长度的基本工具是；一个甲型H1N1约为9×10-8m= nm．13．某同学用以下步骤和方法来测算物理课本内页每张纸的厚度．①将从封面开始的10页纸叠紧；②用刻度尺量出这叠纸的厚度记为L；③算出每张纸的厚度为d=L/10．该同学在以上做法中有三个错误，这三个错误分别是：①____ __；②___ ___；③____ __．五、刻度尺的使用1．如图所示的是测量圆筒直径的几种方法，其中正确的是（）A． B． C． D．2．四位同学分别用同一把最小刻度为毫米的刻度尺测量同一支铅笔的长度，记录错误的是（）A．171.2mm B．1.712dm C．0.01712km D．0.1712m4．下列图中，关于刻度尺使用方法正确的是（）A． B． C． D．5．测量你的身高时，最好选用（）A．分度值是毫米的直尺 B．分度值是厘米的3m软尺 C．分度值是为毫米的2m直尺 D．分度值是为毫米的2m卷尺6．如图所示，用刻度尺测量一木块的长度，测量的结果是（）A．1.25cm B．3.25cm C．0.225mm D．2.25cm7．如图是小明同学测量一物体长度的示意图，在下列读数中正确的是（）A．2.80cm B．3.00cm C．5.80cm D．6.20cm7．实验小组的四位同学，分别用一把分度值是1mm的刻度尺，先后测量物理课本的长度，下列测量结果中，记录正确的是（）A．25.81 B．25.82dm C ．25.82cm D．25.816cm8．现要测量某圆柱体的直径，如图所示几种测量方法中正确的是（）A． B． C． D．9．如图所示，某同学测量一片完整树叶的长度，读数为___ cm．10．如图所示，刻度尺的分度值是___ mm，铅笔的长度为___ cm11．如图所示，刻度尺的分度值是___ ，所测物体的长度是___ cm．。
第一节 吸收概述(复习)Microsoft Word 文档(1)
第一节吸收概述（复习）【学习目标】1、理解吸收和解吸的基本概念，工业应用及分类2、了解亨利定律及有关计算3、了解传质的基本方式，理解双膜理论【学习过程】一、吸收概述1、吸收是利用混合物气体中各组分在同一液体中而实现分离的过程。
2、解吸与吸收操作相反，是指的操作。
3、吸收过程中涉及到的物质包含、、、和。
4、吸收过程中分类标准不同，分类也不同，常见的有以下四种分类方法：依据是否发生显著地化学反应可分为、；依据吸收前后温度是否发生变化可分为、；依据气相或液相中吸收质的含量可分为、；依据吸收的组分多少可分为、。
5、吸收在工业生产中的应用主要有：，，，。
二、吸收的相组成表示方法1、吸收的相组成表示方法通常有和。
2、质量比是指，表达式为气相；液相。
3、摩尔比是指，表达式为气相；液相。
4、质量比和摩尔比可以相互换算：已知质量比，则摩尔比的表达式为；已知摩尔比，则质量比的表达式为。
5、气体在溶液中溶解度通常是指，溶解度的表示方法通常质量表示法和体积表示法，质量表示法为，体积表示法为三、气液相平衡关系1、亨利定律是指。
2、亨利定律的表达式有和两种方法。
其中E值随着溶解度的增大而。
随着温度的上升而；H值随着溶解度的增大而，随着温度的上升而。
E和H的关系为。
3、吸收平衡线是指，表达式为，其中m是指，表达式为，m值随着溶解度的增大而，随着温度的升高而，随着总压的升高而。
4、一般溶液，吸收平衡线是，而对于稀溶液吸收平衡线是，其斜率是。
5、相平衡关系在吸收过程中的应用主要有、和。
四、吸收机理1、传质的基本方式含有和。
2、分子扩算是指，扩散速率主要取决于、和。
3、对流扩算是指，扩散速率主要取决于。
4、吸收操作中常用表示物质在介质中的扩散能力，其值随着、、、变化而变化。
5、双膜理论的要点是、、。
【基础练习】1、双膜理论认为传质阻力主要集中在（）A、气膜中B、气液相界面上C、液膜中D、气液两个膜层中2、当X﹡＞X时（）A、发生吸收过程B、发生解吸过程C、吸收推动力为零D、解析推动力为零3、对气体吸收有利的操作条件是（）A、低温、高压B、高温、高压C、低温、低压D、高温、低压4、氨水的摩尔分数为20％，而它的摩尔比为（）A、15B、20C、25D、305、利用气体混合物各组分在液体中的溶解度的差异而使气体中不同组分分离的操作为（）A、蒸馏B、萃取C、吸收D、解吸6、下述说法错误的是（）A、溶解度系数H值越大，为易容气体B、亨利系数E值越大，为易容气体C、亨利系数E值越大，为难溶气体D、平衡常数m值越大，为难溶气体7、吸收操作的目的是分离（）A、气体混合物B、液体均相混合物C、汽液混合物D、部分互溶的均相混合物8、温度（），将有利于解吸的进行A、降低B、升高C、变化D、不变9、Y为吸收质在气相主体中的浓度，Y﹡为吸收质在气相主体中与液相主体浓度X成平衡的气相浓度。
word上机考试题及答案
word上机考试题及答案在文档的上半部分输入以下内容：-----------------------------第一节：Word上机考试题及答案1. 题目一：基础操作a. 请列举并解释 Word 中的五个常用功能区。
b. 如何在 Word 中插入页眉和页脚？答案：a. Word 中的五个常用功能区分别是首页、插入、布局、引用和视图。
首页包含了一些常用的排版工具，比如字体、段落格式、缩进等。
插入功能区用于插入图片、表格、链接等元素。
布局功能区涵盖了页面设置、页面边距和页面定位等页面布局相关的选项。
引用功能区用于管理文献引用和标注。
视图功能区用于切换不同的视图模式，比如打印预览和分页视图等。
b. 若要在 Word 中插入页眉和页脚，可以通过以下步骤操作：1）点击页面布局功能区中的页眉和页脚按钮；2）选择所需的页眉或页脚模板，或者选择“编辑页眉”或“编辑页脚”以自定义页眉和页脚；3）在页眉或页脚中插入文本、页码、日期等内容；4）点击关闭页眉和页脚按钮，完成插入操作。
2. 题目二：文本编辑与格式化a. 如何在 Word 中实现文本的复制、剪切和粘贴？b. 如何在 Word 中设置文本的字体、字号和颜色？答案：a. 在 Word 中实现文本的复制、剪切和粘贴，可以按照以下步骤进行：1）选中要复制或剪切的文本；2）点击主页功能区的复制按钮（两个复制的方框）或剪切按钮（剪刀形状的图标）；3）将光标移动到要粘贴的位置；4）点击主页功能区的粘贴按钮（粘贴板形状的图标）。
b. 若要设置文本的字体、字号和颜色，可以按照以下步骤进行：1）选中要设置的文本；2）在主页功能区的字体功能组中选择所需的字体；3）在字号功能组中选择所需的字号；4）在字体颜色功能组中选择所需的颜色，或点击“更多颜色”进行自定义颜色的选择。
3. 题目三：段落设置与样式a. 在 Word 中如何调整段落的对齐方式？b. 如何在 Word 中使用内置的样式？答案：a. 在 Word 中调整段落的对齐方式，可以按照以下步骤进行：1）选中要调整对齐方式的段落；2）在主页功能区的段落功能组中的对齐方式按钮中选择左对齐、居中对齐、右对齐或两端对齐。
高中地理《选择性必修1自然地理基础》课后习题word第一节 塑造地表形态的力量
第二章地表形态的塑造第一节塑造地表形态的力量课后训练·巩固提升会应用必备知识基础练(2022·山东临沂期末)巨蟒峰,又名巨蟒出山,位于国家重点风景名胜区——江西省上饶市三清山中心景区。
巨蟒峰是巨型花岗岩石柱,它身上有数道横断裂痕,看上去颇有些大蟒破山而出的意味。
2017年4月15日,三名旅游爱好者用电钻钻孔、打岩钉等方式攀爬三清山巨蟒峰,在巨蟒峰岩柱体上打入岩钉26枚,这一不妥行为对巨蟒峰造成了不可修复的后果。
据此完成1~2题。
1.关于巨蟒峰岩石组成的说法,正确的是(B)A.是由岩浆喷出地壳冷凝形成的B.岩石坚硬,致密,不容易被外力侵蚀C.有层理构造,含有化石D.是在高温、高压条件下发生变质作用形成的2.关于巨蟒峰形成过程的说法,正确的是(A)A.岩浆侵入—地壳抬升—外力风化、侵蚀B.岩浆喷出—地壳抬升—外力风化、侵蚀C.岩浆侵入—地壳下降—外力风化、侵蚀D.岩浆喷出—外力风化、侵蚀—地壳抬升1题,巨蟒峰是巨型花岗岩石柱,花岗岩是岩浆侵入地壳冷凝形成的,A错误;花岗岩的特点是坚硬、致密,不容易被外力侵蚀,B正确;有层理构造,含有化石是沉积岩的特征,C错误;在高温、高压条件下发生变质作用形成的是变质岩,D错误。
第2题,巨蟒峰是巨型花岗岩石柱,花岗岩是岩浆侵入地壳冷凝形成的,然后地壳抬升形成山地,最后受外力风化和侵蚀形成,A正确。
(2021·河南洛阳期中)2021年4月江西赣州宁都盆地发现页岩气藏,储量巨大。
下图为页岩气成藏图和岩石圈物质循环示意图。
读图,完成3~4题。
3.宁都盆地页岩气形成于(C)A.亚欧板块和太平洋板块消亡边界B.亚欧板块和太平洋板块生长边界C.陆地板块内部的褶皱构造带D.陆地板块内部的断层构造带4.由图推断形成页岩气的岩石及过程,对应正确的是(B)A.甲冷却凝固——BB.乙固结成岩——DC.丙重熔再生——AD.丁沉积作用——E3题,宁都盆地位于江西赣州,地处亚欧板块内部,非板块交界地带,A、B错误;该地页岩气资源丰富,而油气资源多储存于背斜构造中,因此推断该地区经历过地壳挤压,形成隆起和凹陷相间的褶皱构造,C正确;断层构造不利于贮藏页岩气,D错误。
计算机一级考word试题及答案
计算机一级考word试题及答案导言：计算机一级考Word试题及答案是针对计算机一级证书考试中涉及到Word软件的题目和答案的整理和归纳。
本文将按照试题类型和知识点的不同，分为多个小节进行详细的论述和解答。
第一节：基础知识题1. Word是一款常用的办公软件，它属于哪一种类型的应用软件？答案：Word属于文字处理软件。
2. 在Word中，如何实现撤销上一步的操作？答案：可以使用快捷键Ctrl+Z来撤销上一步操作。
3. 在Word中，如何实现复制所选文本到剪贴板？答案：可使用快捷键Ctrl+C来复制所选文本。
第二节：文本编辑题4. 如何在Word中设置文本的字号和字体？答案：可以通过在字号和字体选择框中选择相应的字号和字体来设置。
5. 如何实现在Word中插入图片？图片文件，即可将图片插入到文档中。
第三节：段落格式题6. 如何实现调整段落的行间距？答案：可以通过在“段落”对话框中的“间距”选项卡中，设置相应的行间距数值来调整。
7. 如何在Word中实现段落首行缩进？答案：可以通过在“段落”对话框中的“缩进和间距”选项卡中，设置相应的首行缩进数值来实现。
第四节：页面设置题8. 如何在Word中设置页面的纸张大小？答案：可以通过在“页面布局”选项卡中的“纸张大小”选项中选择相应的纸张大小。
9. 如何在Word中设置页面的页边距？答案：可以通过在“页面布局”选项卡中的“页边距”选项中选择相应的页边距数值进行设置。
第五节：表格操作题10. 如何在Word中插入表格？的行数和列数，即可插入表格。
11. 如何在Word中合并表格的单元格？答案：可以通过先选中要合并的单元格，然后点击“布局”选项卡中的“合并单元格”按钮，将所选单元格合并。
结语：通过以上对计算机一级考Word试题及答案的论述和解答，我们可以更好地掌握Word软件的常见操作以及相关的知识点。
希望本文对广大考生提供帮助，加深对计算机一级证书中Word部分的理解和应用能力。
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要求：1、标题设为黑体二号居中，字的颜色为蓝色。
2、正文首行缩进两个字符，楷体四号
3、最后一句“孩子，请记住！飞翔，哪怕翅膀断了”加粗并加着重号。
飞翔，哪怕翅膀断了
孩子，你即将离开我，面向这个世界。
作为母亲的我想对你说一句话那就是：飞翔，哪怕翅膀断了。
人生之路，必有坎坷。
一路走来，你不可能一帆风顺，也不可能总是赢家。
但是，你一定要坚持你自己的梦，无论遭到什麽。
因为痛苦都是必须的，他回是你成为真正的你。
还记得桑兰吗？哪个瘫痪不哭，用微笑征服世界的女孩儿。
面对人生中最大不幸,他坦然的看待着一切。
孩子，我希望你能始终记住你曾经说过的一句话：我也要成为一个坚强的人。
孩子，我也相信你一定能做到。
你的人生只路还很长，一路上，也许你会被绊倒，也许你会被欺骗，也许你会被藐视。
但是，请你自信乐观，你也同样感激这一切。
感激伤害你的人，因为他磨练了你的意志。
感激绊倒你的人，因为他锻炼了你的双腿；感激欺骗你的人，因为他增加了你的智慧；感激一切值得你感激的人或事。
孩子，你应该随时记住，痛苦是必须的，你应该以一颗乐观之心面对这一切。
孩子，坚持自己的梦想，永不放弃。
也许你会遭遇一些不幸，他们使你难过，使你懊丧，使你要放弃理想。
但是，请你记住，心若在，梦就在。
还记得那句广告词吗？心有多大，舞台就有多大。
我希望你能寻找属于自己的舞台。
孩子，去拼搏才会成功。
长路漫漫，痛苦是不可避的。
想象一下，假如铅笔不经历刀削般的痛苦，怎能写出美丽的文字？
孩子，请记住！飞翔，哪怕翅膀断了。