{{B}}Food and Cancer{{/B}}
Medical Experts have suspected for many years that there is a strong link
between what a person eats and cancer. They say a new study provides the first
evidence that vitamins could reduce a person's chance of developing cancer. A
team of Chinese and American scientists did the study. They are from American
National Cancer Institute and the Cancer Institute of the Chinese Academy of
Medical sciences in Beijing. The Journal of the National Cancer Institute
published the results of the study. About thirty thousand people between the
ages of 40 to 69 took part in the study. They were form the northern central
Chinese area of Linxian. Most of them took vitamins and minerals every day for
five years. Linxian was chosen because the people there have an
extremely high rate of cancer of stomach and esophagus. Researchers believe that
fungus and molds in local foods may be partly responsible for the high cancer
rate. Researchers divided those into eight groups. Seven of the groups received
different mixtures of vitamins and minerals daily. The amounts of the vitamins
and minerals were 1 to 2 times greater than what American health officials say
is needed. The eighth group received sugar pills that had no effect. Those who
seemed to fain the most received a mixture of a form of vitamin A called
B-carotene, vitamin E and the mineral selenium. The vitamin and mineral are
believed to prevent damage to cells caused by cancer-causing substances.
Researchers reported a 13 percent drop in cancer rates in those who took
B-carotene, vitamin E and selenium. They also found a 10 percent drop in the
number of deaths caused by strokes from bursting blood vessels.
Scientists warn that it is too soon to know if the effect, would be the
same among people in other countries. They note that the people in Linxian eat
foods that lack necessary vitamins and minerals. Chinese officials will continue
to record the health records of the people in Linxian for many years. For now
officials reportedly are considering using the results of the study. They want
to find a way to improved the health of people in Linxian and other small towns
in China.
单选题
The results of the new study are unexpected.
【正确答案】
B
【答案解析】[解析] 问题句：新的研究结果出乎人们的意料之外。
确认线索词：new study，因为该词是句子中的核心词。
答案相关句：
Medical Experts have suspected for many years that there is a strong link between what a person eats and cancer．eveloping cancer．该划线句说“他们(医学专家)一项新的研究提供了第一个证据……”，该句前面说“医学专家很多年—直怀疑人们的饮食和癌症之间有直接的联系”，因此可见新的研究结果不是意料之外，而是意料之中的。
单选题
Among the scientists that did the study, there are more Chinese than Americans.
【正确答案】
C
【答案解析】[解析] 问题句：在做那项研究的科学家中，中国人比美国人多。确认线索词：Chinese和American，因为它们是句子中的核心词，也是特征词。答案相关句：
A team of Chinese and American scientists did the study. They are from American National Cancer Institute and the Cancer Institute of the Chinese Academy of Medical sciences in Beijing. The Journal of the National Cancer Institute published the results of the study. About thirty thousand people between the ages of 40 to 69 took part in the study. They (30 000 名研究对象) were from the northern central Chinese area of Linxian. Most of them took vitamins and minerals every day for five years.包含线索词的句子和周围的句群都没有涉及美国科学家和中国科学家人数的比较，因此判断问题句的说法为“没提到”。
单选题
The study lasted for about five years.
【正确答案】
A
【答案解析】[解析] 问题句：研究持续了大约5年。确认线索词：five years，因为该词是特征词。
答案相关句：
They were from the northern central Chinese area of Linxian． every day for five years．该句说“大部分研究对象每天服用维他命和矿物质，服用了5年”，因此可以推断出“研究持续了大约5年”。
单选题
The rate of cancer of stomach and esophagus in Linxian is the highest in China.
【正确答案】
C
【答案解析】[解析] 问题句：宁夏胃癌和食道癌的发生率是中国最高的。确认线索词：cancer of stomach and esophagus(食道)，因为该短语是特征结构。
答案相关句：
esophagus．该句只是说“宁夏胃癌和食道癌的发生率是极高的”，并没有说是中国最高的，而后句： Researchers believe that fungus(菌类)and molds (霉) in local foods may be partly responsible for the high cancer rate．该句讲述造成胃癌和食道癌的高发生率的原因引出的是新的话题，没有进行胃癌和食道癌的发生率的比较，因此判断问题句的说法为“没提到”。
单选题
Fungus and molds in local foods may be partly responsible for the high cancer rate in Linxian.
【正确答案】
A
【答案解析】[解析] 问题句：当地食物中的菌类和霉菌可能是造成宁夏癌症高发率的原因。确认线索词：Fungus和molds，因为它们是特征词语。
答案相关句：
Researchers believe that fungus(曹类)and molds (霉) in local foods may be partly responsible for the high cancer rate．该句的说法与问题句的说法一致。
单选题
All those people who took part in the study received vitamins and minerals.
【正确答案】
B
【答案解析】[解析] 问题句：所有参加研究的人都服用维他命和矿物质。确认线索词：vitamins and minerals，因为它们是该句的核心词。
答案相关句：
and minerals daily．The amounts of the vitamins and minerals were 1 to 2 times greater than what American health officials say is needed．The eighth group received sugar pills that had no effect.原文说：“研究对象有8组，其中7组每天服用维生素和矿物质，而第8组服用的是对健康没有影响的糖丸”，因此可见“不是所有的研究对象都服用维他命和矿物质”，所以问题句的说法错误。
单选题
The results of the study are of great significance to people everywhere.
【正确答案】
B
【答案解析】[解析] 问题句：研究结果对世界各地的人都具有很大的意义。确认线索词：因为该句是概括总结句，所以很可能与该句相关的内容会在文章中间接的山现，而且因为该句是谈及研究的意义，因此推断答案相关句很可能会出现在文章的最后部分。
答案相关句：
(最后—段)other countries．该句说“目前还不能知道是否这个影响对其他国家的人们是一样”(最后一句)They want to find away to improved theh ealth of people in Linxian and other small towns in China．在最后一句山提到仍然是宁夏和中国的其他小城市的问题。因此判断问题句的说法不正确。