题目内容
（请给出正确答案）
A.while
B.where
C.when
D.however
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更多“Why are some cancers cured by …”相关的问题
听力原文： (29)Cancer is the second leading cause of death after heart disease.
Death rates for both diseases are falling. But researchers say the rate for heart disease is falling faster. As a result, an American Cancer Society report shows that cancer now kills more Americans under the age of eighty-five than any other cause.
Some cancers can be prevented or treated, especially if found early. Cancer is the name for a group of diseases. All involve the uncontrolled growth and spread of cells that are not normal. Cell growth and division are controlled by genes. (30) Some cancers are linked to family genetics. Pollution and chemicals can also raise a person's risk of cancer.
The report shows that in recent years, cancer rates in the United States have dropped about one percent per year. Lung, colon, breast and prostate cancer make up more than half of all the cases. For men, prostate cancer is the most common. For women, it is breast cancer. Rates of both have continued to increase, but more slowly than in the past.
Smoking causes about one-third of all cancer deaths. Poor diet and a lack of exercise are blamed for another third in the United States.
(31) The American Cancer Society says cancer deaths worldwide could increase nearly one hundred percent in the next twenty years. Yet most could be avoided. The report calls tobacco use "the number one cause of cancer and the number one cause of preventable death throughout the world. "
Hepatitis and other infections will cause an estimated seventeen percent of new cancers worldwide this year. (32) Such cancers are especially common in developing countries, and many of these cases can also be prevented.
29．What is the first leading cause of death？
30.What can be learned about cancers from the passage？
31.What does the American Cancer Society say about cancer？
32.What do we learn about cancers in developing countries'？
(33)
A．Heart disease.
B．Cancer.
C．Smoking.
D．Poor diet.
A.some; some
B.any; any
C.some; any
D.any; some
Which of the following is one of the reasons why telecities are preferred by some people？
A．Better environment.
B．Efficient traffic.
C．Low cost of housing.
D．Low rate of terrorism.
Why do the “little thieves” steal？
A．They want some excitement.
B．They want the things they can't afford.
C．They want to earn money in this way.
D．They do it for a living.
Why are some of the agency's clients offered few or none of photographic assignments？
A．Because they look like historical figures, minor pop-performance, or obscure royalty.
B．Because they are royal look-alikes.
C．Because they do not bear resemblance to long-forgotten actors.
D．Because their similarity is not to historical actors~
The reason why some African American are more salt-sensitive is that _________
A. their kidney handle sodium in a different way
B. they are exposed to sodium more often
C. they eat much bread
D. they are inclined to gain weight
Why do some students drop out after a year or two according to the author？
A．They have lost confidence in themselves.
B．They cannot afford the high tuition.
C．They cannot adapt to the rigor of the school.
D．They fail to develop interest in their studies.
Why do some Japanese parents send their children to university-based kindergartens？
A．They can do better in their future studies.
B．They can accumulate more group experience there.
C．They can be individually oriented when they grow up.
D．They can have better chances of getting a first-rate education.
