题目内容

艾萨克·阿西莫夫（Isaac Asimov）是美国科学家兼作家，1920年1月2日出生于俄罗斯， 1992年4月6日于纽约去世。1948年他获得了化学博士学位。第二年在波士顿大学的医学院任生化教师。1958年他放弃了教学工作成为专职作家。一生中，他写过大约480本书，包括怪诞小说、科学和历史方面的书，甚至还写过有关《圣经》和莎士比亚的书。但使他最负盛名的作品是他的科幻小说, 如《基地》三部曲，《我，机器人》等。

练习册系列答案
相关题目

Can eating a chocolate bar every day really prevent age-related memory loss? No. But a new research shows that large amounts of flavones, substances found in cocoa, tea and some kinds of vegetables, may improve age-related memory failure.

Dr. Scott Small is a professor of neurology at Columbia University in new York City He is the lead writer of a research paper describing the effects of cocoa flavones on brain activity His study involved 37 volunteers aged between 50 and 69. Researchers gave them a high-level flavones drink made from cocoa beans or a low-level flavones drink. For a period of three months, some subjects got 900 milligrams of flavones a day. The others got 10 milligrams of flavones each day. Brain imaging and memory tests were given to each study subject before and after the study Dr. Small says that the subjects who had the high-level flavones drink showed much improvement on memorytests.

The researchers warn that more work is needed to be done because this study was performed only on a small group. Dr. Joann Manson is the lead researcher of a four .year study involving 18,000 adults. This study will use flavones capsules(胶囊) The study subjects will be divided into two groups and will take two pills per day. The capsules used will all Look the same. But one group's capsules will contain flavones, while the other group will take capsules made of an inactive substance, or placebo

Dr. Manson says it's not necessary for people to start eating more chocolate, because 3 person would have to eat a huge amount of chocolate to get the same level of flavones given to the Lest subjects. He adds many manufacturers have planned to remove the flavones from their chocolate products. Similarity, Dr. says a cocoa-based flavones extract（提取）may be developed in the future But he says that more studies are needed to see how much flavones is good for our health

1.What was done to the subjects alter Dr. Small's study?

A. They were asked to take a high-level flavones drink

B. They were given capsules containing flavones

C. They were given brain imaging and memory tests

D. They were asked to take two pills of flavones capsules per day

2.What's the similarity of the 2 experiments?

A. Both use high-level flavones capsules

B. The number of the subjects is the same

C. Drinks and placebos are used in both experiments

D. The subjects are divided into two groups in both experiments

3.Why will Dr. Manson carry out the four-year study?

A. To prove the first experiment is wrong

B. To carry out the experiment further

C. To test how much flavones can improve our memory.

D. To show eating chocolate is better to improve memory.

4.What can we learn from the last paragraph?

A. It's not necessary for us to eat chocolate

B. The more we eat flavones, the better our health will be

C. In the future we can get flavones without eating chocolate

D. It's easy for people to get the same level of flavones given to the test subjects

Waste can be seen everywhere in the school. Some students ask for more food than they can eat and others often forget to turn off the lights when they leave the classroom. They say they can afford these things. But I don’t agree with them.

Waste can bring a lot of problems. Although China is rich in some resources(资源), we are short of others, for example, fresh water. It is reported that we will have no coal or oil to use in 100 years. So if we go on wasting our resources, what can we use in the future and where can we move? Think about it. I think we should say no to the students who waste things every day. Everybody should stop wasting as soon as possible.

In our everyday life, we can do many things to prevent waste from happening, for example, turn off the water taps when we finish washing, turn off the lights when we leave the classroom, try not to order more food than we need, and so on. Little by little, everything will be changed. Waste can be stopped one day, if we do our best.

1.Which is not mentioned in this passage?

A. Fresh water. B. Forest. C. Oil. D. Coal.

2.What may happen in 100 years?

A. We may still have enough oil.

B. We may still have enough coal.

C. We may have a little oil.

D. We may have no coal or oil to use.

3.Which of the following is right?

A. Waste brings problems.

B. Waste can bring no problem.

C. China is rich in fresh water.

D. Students never waste things.

4.Which is the best title of this passage?

A. Stop Wasting

B. School life

C. Waste in the School

D. Rich Resources in China

Cheating is when a person misleads, deceives or acts dishonestly on purpose. 1. If a basketball team is for kids under 8,it's cheating for a 9-year-old play on the team. At school, in addition to cheating on a test, a kid might cheat by stealing someone else's idea for a science project. 2. This kind of cheating is called plagiarizing (抄袭).

3. Jeff is doing it by sneaking answers to a test. And it's also cheating to break the rules of a game or contest or to pretend something is yours when it isn't. When people cheat, it's not fair to other people.

It's tempting(诱惑人的) to cheat because it makes difficult things seem easy, like getting all the right answer on the rest. 4. And it won't help on the next test-unless the person cheats again.

5. They want to get good grades but hate hard work. Other kids might feel like they can't pass the test without cheating. Even though there seems to be a "good reason" for cheating, cheating isn't a good idea.

A. Some kids cheat because they're lazy.

B. Cheating can happen in a lot of different ways.

C. But it doesn't solve the problem of not knowing the material.

D. Some kids cheat once and feel so bad that they never do it again.

E. For kids, cheating may happen at school, at home, or while playing a sport.

F. There are plenty of reasons why a kid shouldn't cheat, but some kids have already cheated.

G. Kids may also cheat by copying a book report off the Internet and handing it in as it's his or her original work.

根据短文内容，从短文后的选项中选出填入空白处的最佳选项，有两项是多余的。

If you’d like to become a dancer, spend some time choosing a dance style. Each type of dance is made up of techniques which need to be practiced and mastered. 1.

Once you have decided to become a dancer, it is important to carefully choose a dance class. 2.

It is easy to form bad habits in the beginning, and extremely hard to correct them. So choosing a good teacher will help you a lot from the beginning.

3. Special dance shoes will be required for most dance styles, including ballet slippers for ballet and tap shoes for tap. Your dance teacher will probably have a preference for clothing, such as a black leotard(紧身衣) with pink tights for a ballet dancer, or black dance pants(短裤) for a jazz dancer.

If you are enrolled in your very first dance class, tour the dance studio before your first day. 4.

The floors of dance studios should be soft, as dancing on hard floors may cause injuries. The class structures will vary for the different dance styles.

Get connected with another dancer, check out the dance forum to exchange steps and moves, ask for advice, and make new friends!

Also, sign up for our free weekly e-mail newsletter to learn more about the dancing world and to stay informed of what’s new about dance. 5.

A．Most dance studios are large and airy with at least one full wall of mirrors.

B．Then comes the problem-what shoes to wear when dancing.

C．And your choice of a dance teacher is very important too.

D．Have fun on the journey to becoming a dancer!

E．Your goal as a dancer will help you decide which style of dance is right for you.

F．What to wear will be determined by the type of dancer you choose to become.

G．Learn the names of basic ballet steps and much more.

Many years ago the idea of disabled people doing sport was never heard of. But when the yearly games for the disabled were started at Stoke Mandeville, England in 1948 by Sir Ludwig Guttmann, the situation began to change.

Sir Ludwig Guttmann, who had been driven to England in 1939 from Nazi Germany, had been asked by the British government to set up an injuries centre at Stoke Mandeville Hospital near London. His ideas about treating injuries included sport for the disabled.

In the first games just two teams of injured soldiers took part. The next year 1949, five teams took part. From those beginnings, things have developed fast. Teams now come from abroad to Stoke Mandeville every year. In 1960 the first Olympics for the disabled were held in Rome, in the same place as the normal Olympic Games. Now, every four years the Olympic Games for the disabled are held, if possible, in the same place as the normal Olympic Games, although they are organized separately. In other years Games for the disabled are still held at Stoke Mandeville. In the 1984 wheelchair Olympic Games, 1064 wheelchair athletes from about 40 countries took part. Unfortunately, they were held at Stoke Mandeville and not in Los Angeles, along with the other Olympics.

The Games have been a great success in helping the progress of international friendship and understanding, and in proving that being disabled does not mean you can’t enjoy sport. One small source of disappointment for those who organize and take part in the games, however, has been the unwillingness of the International Olympic Committee to include disabled events at the Olympic Games for the able bodied. Perhaps a few more years is still needed to persuade those fortunate enough not to be disabled that their disabled fellow athletes should be included.

1. The first games for the disabled were held after Sir Ludwig Guttmann arrived in England.

A.40 years

B.21 years

C.10 years

D.9 years

2.This text tells us that Sir Ludwig Guttmann .

A. was an early organizer of the games for the able-bodied

B. was welcomed by the British government

C. was an injured soldier

D. was from England

3.From the passage, we may know that the writer is .

A. one of the organizers of the games for the disabled

B. a disabled person who once took part in the games

C. against holding the games for the disabled

D. in favour of holding the games for the disabled

She felt about wearing the improper garment at the party.

A.embarrassing B.embarrass

C.to embarrass D.embarrassed

The newly built washingroom in the railway station is to the disabled passengers.

A.perfect B.accessible

C.remarkable D.potential

Bill thought rain was out of question, so he didn’t bring umbrella．

A．the; an B．/; an

C．a; the D．the; /

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网