University is most worthwhile time of discovery and learning, and it is also very enjoyable and valuable experience for every one of us. A.a,a B.a,/ C./,a D.a,he 题目和参考答案——青夏教育精英家教网—

题目内容

University is ______ most worthwhile time of discovery and learning, and it is also ______very enjoyable and valuable experience for every one of us.

A.a；a B.a；/ C./；a D.a；he

解析:

第一空用不定冠词 a. 与most连用, most相当于 very, 只有在特定范围中表示 “最……” 才可以用最高级。experience 用作“经历”之意时，为可数名词，要与不定冠词连用。

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Smoking, which may be a pleasure for some people, is a series of discomfort for their fellows. Medical scientists have expressed their concern about effect of smoking on the health not only of those who smoke but also those who do not smoke. In fact, non-smokers who take in the air polluted by tobacco smoke suffer more than the smokers themselves. A great number of students are trying to persuade the university to forbid smoking in classrooms. Believe they are completely right in their aim. However, I think it more important to achieve this by calling on the smokers to use good judgment and to show concern for others. Smoking is not allowed in theaters, cinemas and in other public places. Therefore, smoking must be forbidden in our classroom. Although many people have passed away for having smoked a lot and we call on people to give up smoking, yet many more that are following will turn down what we say every day, above all, the young people smoke a lot more.

In the writer’s opinion, smoking does good to ________.

A. nobody B. some people C. smokers D. young people

The phrase “pass away” probably means ________.

A. leave one’s home B. lose one’s life C. pass by D. go away

According to the selection, which of the following is true?

A. Smokers suffer from the polluted air more than the non-smokers.

B. Non-smokers suffer from the polluted air more than the smokers.

C. Non-smokers suffer as much from the polluted air as the smokers.

D. Non-smokers don’t suffer so much from the polluted air as the smokers.

Can people change their skin colour without suffering like pop king Michael Jackson? Perhaps yes. Scientists have found the gene that determines skin colour.

The gene comes in two versions, one of which is found in 99 per cent of Europeans. The other is found in 93 to 100 per cent of Africans, researchers at Pennsylvania State University report in the latest issue of Science.

Scientists have changed the colour of a dark-striped zebrafish to uniform gold by inserting a version of the pigment(色素) gene into a young fish. As with humans, zebrafish skin colour is determined by pigment cells, which contain melanosomes(黑色素). The number, size and darkness of melanosomes per pigment cell determines skin colour.

It appears that, like the golden zebrafish, light-skinned Europeans also have a mutation(变异) in the gene for melanosome production. This results in less pigmented skin.

However, Keith Cheng, leader of the research team, points out that the mutation is different in human and zebrafish genes.

Humans acquired dark skin in Africa about 1.5 million years ago to protect bodies from ultra-violet rays of the sun(太阳光紫外线), which can cause skin cancer.But when modern humans leave Africa to live in northern latitudes, they need more sunlight on their skin to produce vitamin D. So the related gene changes, according to Cheng.Asians have the same version of the gene as Africans, so they probably acquired their light skin through the action of some other gene that affects skin colour, said Cheng.

The new discovery could lead to medical treatments for skin cancer. It also could lead to research into ways to change skin colour without damaging it like chemical treatment did on Michael Jackson.

The passage mainly tells us that ________.

A. people can not change their skin colour without any pain

B. the new discovery could lead to search into ways to change skin colour safely

C. pop king Michael Jackson often changed his skin colour as he liked

D. scientists have found out that people’s skin colour is determined by the gene

It can be inferred from the passage that ________.

A. nowadays people who want to change their skin colour have to suffer a lot from the damage caused by the chemical treatment B. Europeans and Africans have the same gene

C. the new discovery could help to find medical treatments for skin cancer D. there are two kinds of genes

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A. find the different genes of humans’

B. prove the humans’ skin colour is determined by the pigment gene

C. find out the reason why the Africans’ skin colour is dark D. find out the ways of changing peopl’s skin colour

The reason why Europeans are light-skinned is probably that ________.

A. they are born light-skinned people

B. light-skinned Europeans have mutation in the gen for melanosome production

C. they have fewer activities outside D. they pay much attention to protecting their skin

The writer’s attitude towards the discovery is ________.

A. neutral B. negative C. positive D. indifferent

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Training costs have dropped to 2,600 yuan for students, according to the Haidian Driving School in Beijing. The price is not really low,but students will accept it, seeing it as an investment (投资) in their future. Familiarity with the operation of computers and fluent English are the basic skills graduating students need to find a job. But a driver's permit has become another factor (因素).

"in the job market, owning a driver's permit someumes strengthens a graduating student's competitiveness for a good position,'' says Zhou Yang, an undergraduate at the China University of Political Science and Law.

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Xu Jian, an official at the driving school, said undergraduates were very able and serious, and could grasp in an hour what ordinary people took four hours to learn. In this driving school, mid-die-aged people, young women and college students are the main customers.

To get a driver's permit, a beginner is now required to have at least 86 hours' practice before the .final road test.

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"Although positive mood seems to promote creativity, flexibility, cooperation, and reliance on mental shortcuts, negative moods trigger (引发) more attentive, careful thinking, paying greater attention to the external world," Forgas wrote.

"Our research suggests that sadness ... promotes information processing strategies best suited to dealing with more demanding situations."

For the study, Forgas and his team conducted several experiments that started with inducing happy or sad moods in their subjects through watching films and recalling positive or negative events.

In one of the experiments, happy and sad participants were asked to judge the truth of urban myths and rumors and found that people in a negative mood were less likely to believe these statements.

People in a bad mood were also less likely to make snap decisions based on racial or religious prejudices, and they were less likely to make mistakes when asked to recall an event that they witnessed.

The study also found that sad people were better at stating their case through written arguments, which Forgas said showed that a "mildly negative mood may actually promote a more concrete, accommodative and ultimately more successful communication style."

"Positive mood is not universally desirable: people in negative mood are less prone to judgmental errors, are more resistant to eyewitness distortions（扭曲）and are better at producing high-quality, effective persuasive messages," Forgas wrote.

The study was published in the November/December edition of the Australian Science journal.

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A. is particular about everything B. shows less concern about others

C. is willing to believe what he hears D. cares more about his surroundings

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A. New ideas. B. Being stubborn. C. Being careful. D. Concentration.

_ How did researcher put the subjects in good or bad moods?

A. By watching sports programs. B. By listening to happy or sad stories.

C. By dealing with demanding situations. D. By thinking back on their past experience.

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A. Positive mood leads to better judgement.

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C. Cheerful people were less likely to believe rumors.

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B. They have to study science and mathematics.

C. They work in fields as well as in laboratories.

D. They read research papers written by others.

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A. An ichthyologist has an interesting and varied profession.

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A. Tom, because he likes fishing and outdoor sports.

B. Jack, because he likes to travel and read adventure books.

C. Jenny, because she likes science, mathematics and reading about dinosaurs.

D. Jane, because she likes mathematics, science, biology and searching rock-pools.

71. The passage is probably written for .

A. university students B. science researchers

C. fisheries experts D. fish farmers

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