题目内容

Since three Chinese astronauts piloted Shenzhou IX to link up with Tiangong-l, China's exploration of outer space has reached new stage.

A.不填;a B.the; a

C.a:the D.不填:不填

 

A

【解析】

试题分析:本题第一空后的名词out space外太空,是一个抽象名词,同时也是不可数名词,所以单独使用;第二空在名词stage前面加a泛指一个新阶段。句意:因为中国宇航员成功把神州飞船对接天宫一号,中国的太空探索达到了一个新阶段。故A正确。

考点:考查冠词

 

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Every fall, like clockwork, Linda Krentz of Beaverton, Oregon, felt her brain go on strike. “I just couldn’t get going in the morning,” she says. “I’d get depressed and gain 10 pounds every winter and lose them again in the spring.” Then she read about seasonal affective disorder, a form of depression that occurs in fall and winter, and she saw the light-literally. Every morning now she turns on a specially constructed light box for half an hour and sits in front of it to trick her brain into thinking it’s still enjoying those long summer days. It seems to work.

Krentz is not alone. Scientists estimate that 10 million Americans suffer from seasonal depression and 25 million more develop milder versions. But there’s never been definitive proof that treatment with very bright lights makes a difference. After all, it’s hard to do a double-blind test when the subjects can see for themselves whether or not the light is on. That’s why nobody has ever separated the real effects of light therapy from placebo(安慰剂) effects.

Until now. In three separate studies published last month, researchers report not only that light therapy works better than a placebo but that treatment is usually more effective in the early morning than in the evening. In two of the groups, the placebo problem was resolved by telling patients they were comparing light boxes to a new anti-depressant device that emits negatively charged ions. The third used the timing of light therapy as the control.

Why does light therapy work? No one really knows. “Our research suggests it has something to do with shifting the body’s internal clock,” says psychiatrist Dr. Lewey. The body is programmed to start the day with sunrise, he explains, and this gets later as the days get shorter. But why such subtle shifts make some people depressed and not others is a mystery.

That hasn’t stopped thousands of winter depressives from trying to heal themselves. Light boxes for that purpose are available without a doctor’s prescription. That bothers psychologist Michael Terman of Columbia University. He is worried that the boxes may be tried by patients who suffer from mental illness that can’t be treated with light. Terman has developed a questionnaire to help determine whether expert care is needed.

In any event, you should choose a respectable manufacturer. Whatever product you use should emit only visible light, because ultraviolet light damages the eyes. If you are photosensitive, you may develop a rash. Otherwise, the main drawback is having to sit in front of the light for 30 to 60 minutes in the morning. That’s an inconvenience many winter depressives can live with.

1.What is the probable cause of Krentz’s problem?

A. An unexpected gain in body weight.

B. Unexplained impairment of her nervous system.

C. Weakening of her eyesight with the setting in of winter.

D. Poor adjustment of her body clock to seasonal changes.

2.By saying that Linda Krentz saw the light” (Line 4, Para. 1), the author means that she _______.

A. learned how to lose weight

B. realized what her problem was

C. came to see the importance of light

D. felt sleepy and blue

3.What is the CURRENT view concerning the treatment of seasonal depression with bright lights?

A. Its effect remains to be seen.

B. It serves as a kind of placebo.

C. It proves to be an effective therapy.

D. It hardly produces any effects.

4.What is psychologist Michael Terman’s major concern?

A. Winter depressives will be addicted to using light boxes.

B. No mental patients would bother to consult psychiatrists.

C. Inferior light boxes will emit harmful ultraviolet lights.

D. Light therapy could be beyond the tolerance of certain mental patients.

 

For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.

Indoor air pollution can cause a person to feel tired, to suffer eye pain, headache and other problems. Some pollutants(污染物) can cause breathing disorders, diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution.

People have paid more attention to the problem now. It is true that when builders began making houses and offices they did not waste energy. To do this they build buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.

As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building--green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square meters of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and more healthy place.

1.Generally speaking, indoor air pollution may be more harmful than the air outside because________.

A. indoor air pollution can often make people seriously ill

B. there may be more harmful gases outside the buildings

C. the air indoors is polluted, which is very harmful

D. man-made building materials give off dangerous gases

2.Some kind of indoor pollution can be found in _______.

A. every modern house B. every old house

C. all kinds of houses D. all kinds of offices

3.The indoor air pollution is caused by ______.

A. the building way that the builders want to save energy

B. the man-made building materials and the limit of air-flow

C. the building things that are made of man-made materials

D. the limit of the flow of air between inside and outside

4.The reason why we should use different kinds of plants to clean the air is that ______.

A. plants can let out all kinds of pollutants indoors

B. plants may take in more oxygen which people need

C. plants can absorb all kinds of harmful indoor chemicals

D. plants can make our houses prettier and more healthy

 

People are being lured (引诱) onto Facebook with the promise of a fun, free service without realizing they’re paying for it by giving up large amounts of personal information. Facebook then attempts to make money by selling their data to advertisers that want to send targeted messages.

Most Facebook users don’t realize this is happening. Even if they know what the company is up to, they still have no idea what they’re paying for Facebook because people don’t really know what their personal data is worth.

The biggest problem, however, is that the company keeps changing the rules. Early on, you keep everything private. That was the great thing about facebook — you could create your own little private network. Last year, the company changed its privacy rules so that many things — your city, your photo, your friends' names—were set, by default (默认) to be shared with everyone on the Internet.

According to Facebook’s vice-president Elliot Schrage, the company is simply making changes to improve its service, and if people don’t share information, they have a “less satisfying experience”.

Some critics think this is more about Facebook looking to make more money. Its original business model, which involved selling ads and putting them at the side of the page, totally failed. Who wants to look at ads when they’re online connecting with their friends?

The privacy issue has already landed Facebook in hot water in Washington. In April, Senator(议员) Charles Schumer called on Facebook to change its privacy policy. He also urged the Federal Trade Commission to set guidelines for social-networking sites. “I think the senator rightly communicated that we had not been clear about what the new products were and how people could choose to use them or not to use them,” Schrage admits.

I suspect that whatever Facebook has done so far to invade our privacy is only the beginning, which is why I’m considering deactivating(撤销) my account. Facebook is a handy site, but I’m upset by the idea that my information is in the hands of people I don’t know. That’s too high a price to pay.

1.What do we learn about Facebook from the first paragraph?

A. It is a website that sends messages to targeted users.

B. It makes money by putting on advertisements.

C. It profits by selling its users’ personal data.

D. It provides loads of information to its users.

2.What does the author say about most Facebook users?

A. They are reluctant to give up their personal information.

B. They don’t know their personal data enriches Facebook.

C. They don’t identify themselves when using the website.

D. They care very little about their personal information.

3.Why does Facebook make changes to its rules according to Elliot Schrage?

A. To provide better service to its users.

B. To follow the Federal guidelines.

C. To improve its users’ connectivity.

D. To expand its scope of business.

4.What does Senator Charles Schumer advocate?

A. Setting guidelines for advertising on websites.

B. Banning the sharing of users’ personal information.

C. Formulating(制订) regulations for social-networking sites.

D. Removing ads from all social-networking sites.

5.Why does the author plan to cancel his Facebook account?

A. He is dissatisfied with its current service.

B. He finds many of its users untrustworthy.

C. He doesn’t want his personal data abused.

D. He is upset by its frequent rule changes.

 

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