Nuclear power's danger to health, safety, and even life itself can be described in one word; radiation(辐射).

    Nuclear radiation has a certain mystery about it, partly because it cannot be detected (探测) by human senses. It can't be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can't detect them, sense them, without a radio receiver. Similarly, we can't sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.

    At very high levels, radiation can kill an animal or human being completely by killing masses of cells in important organs (器官). But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit, and if they are killed completely. Your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in an unusual way. They can grow into cancer. Sometimes this does not show up for many years.

This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the knowledge of the person at the time that damage has occurred. A person can be irradiated(放射治疗) and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or easy to get serious illness as a result of radiation absorbed by its grandparents.

     Radiation can hurt us. We must know the truth.

According to the passage, the danger of nuclear power lies in __________.

A. nuclear mystery              B. radiation detection

C. radiation level                 D. nuclear radiation

Radiation can lead to serious results even at the lowest level ________.

A. when it kills few cells             B. if it damages few cells

C. though the damaged cells can repair themselves

D. unless the damaged cells can reproduce themselves

Radiation can hurt us in the way that it can _____.

A. kill large numbers of cells in main organs so as to cause death immediately

B. damage cells which may grow into cancer years later

C. affect the healthy growth of our younger generation

D. lead to all of the above results

Which of the following can be best inferred from the passage?

A. The importance of protection from radiation can be overemphasized (过分强调).

B. The mystery about radiation remains unsolved.

C. Cancer is mainly caused by radiation.

D. Radiation can hurt those who do not know about its danger.

.

Few laws are so effective that you can see results just days after they take effect. But in the nine days since the federal cigarette tax more than doubled---to $1.01 per pack---smokers have jammed telephone “quit lines” across the country seeking to kick the habit.

This is not a surprise to public health advocates. They’ve studied the effect of state tax increases for years, finding that smokers, especially teens, are price sensitive. Nor is it a shock to the industry, which fiercely fights every tax increase.

The only wonder is that so many states insist on closing their ears to the message. Tobacco taxes improve public health, they raise money and most particularly, they deter people from taking up the habit as teens, which is when nearly all smokers are addicted. Yet the rate of taxation varies widely.

In Manhattan, for instance, which has the highest tax in the nation, a pack of Marlboro Light Kings cost $10.06 at one drugstore Wednesday. In Charleston, S.C., where the 7-bent-a-pack tax is the lowest in the nation. The price was $4.78.

The influence is obvious.

In New York, high school smoking hit a new low in the latest surveys----13.8%,far below the national average. By comparison, 26% of high school students smoke in Kentucky, Other low-tax states have similarly depressing teen-smoking records.

Hal Rogers, Representative from Kentucky, like those who are against high tobacco taxes, argues that the burden of the tax falls on low-income Americans “who choose to smoke.”

That’s true, But there is more reason in keeping future generations of low-income workers from getting hooked in the first place. As for today’s adults, if the new tax drives them to quit, they will have more to spend on their families, cut their risk of cancer and heart disease and feel better.

41. The text is mainly about___________.

A. the price of cigarettes               B. the rate of teen smoking

C. the effect of tobacco tax increase      D. the differences in tobacco tax rate

42. What does the author think is a surprise?

A. Teen smokers are price sensitive.     B. Some states still keep the tobacco tax low.

C. Tobacco taxes improve public health.    D. Tobacco industry fiercely fights the tax rise.

43. The underlined word "deter" in Paragraph 3 most probably means      .

A. discourage    B. remove    C. benefit      D. free

44. Rogers’ attitude towards the low-income smokers might be that of     .

A. tolerance   B. unconcern    C. doubt   D. sympathy

45. What can we learn from the last paragraph?

A. The new tax will be beneficial in the long run.

B. Low-income Americans are more likely to fall ill.

C. Future generations will be hooked on smoking.

D. Adults will depend more on their families.

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