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由非光合微生物生成氢气

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由非光合微生物生成氢气

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     The World Health Organization estimates that more than 4 million people die each year from the

effects of smoking tobacco (烟草). That number is increasing.

     WHO officials expect 150 million people to die from tobacco use in the next twenty years. Seven in

ten of those deaths will be in developing countries. These numbers are frightening. Yet people around the world continue to smoke.

     It is not easy to stop smoking. However, doctors say you will live longer if you do stop smoking.

You will feel better and look better. You will also protect the health of family members who breathe in

your smoke.

     The American Cancer Society says there is not just one right way to stop smoking. It says that one

method or a unit of methods may be successful. These include attending self-help programs or following

directions in a book. The group says any way to stop smoking that is legal, moral and effective is worth

trying. This could include taking long walks or spending time in areas where smoking is not allowed.

Also, you could eat a small piece of fruit instead of having a cigarette.

     The American Cancer Society says the sooner smokers stop smoking, the more they reduce (减少)

their chances of getting cancer and other diseases. It says blood pressure returns to normal twenty

minutes after a smoker smoking the last cigarette. Carbon monoxide (CO) gas levels in the blood return

to normal after eight hours. In a day, the chances of a heart attack decrease. In a year, the risk of heart

disease is half that of a smoker.

1. Most people who will die from smoking are from ____.

A. big countries  

B. small countries  

C. developing countries

D. developed countries

2. The author may hold the attitude(态度)that ______.

A. people can easily give up smoking  

B. people will feel much better after giving up smoking

C. it is not necessary for people to give up smoking forever

D. it is hard to say whether it is good to give up smoking or not

3. According to the American Cancer Society, after smokers stop smoking, the quickest effect is

   that ________.

A. the chances of having a heart attack get smaller

B. blood pressure returns to normal

C. carbon monoxide gas levels in the blood return to normal

D. the risk of heart disease for a non-smoker is half that of a smoker

4. We can infer from the passage that________.

A. WTO officials say that a person will live longer if he / she stops smoking

B. the smoker can affect the health of his or her family members

C. following any way can help you stop smoking

D. no matter how hard you try it, it is worth doing that
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