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Although too much【C1】______to the sun’s ultraviolet rays can cause skin cancer, sunshine may have a【C2】______effect against some
Although too much【C1】______to the sun’s ultraviolet rays can cause skin cancer, sunshine may have a【C2】______effect against some
admin
2013-02-16
18
问题
Although too much【C1】______to the sun’s ultraviolet rays can cause skin cancer, sunshine may have a【C2】______effect against some cancers, U.S. scientists said in April. They【C3】______vitamin D, the so-called sunshine vitamin that is also found in fortified milk and【C4】______products, cod liver and some fatty fish, can help to slow down the speed【C5】______which cancer【C6】______divide. "This study found inverse【C7】______between both residential and occupational exposure to sunlight【C8】______mortality from female breast and colon cancers," said Dr. Michael Freedman of the National Cancer【C9】______.
In research【C10】______in Occupational and Environmental Medicine, Freedman and his team studied【C11】______from breast, ovarian, colon, prostate and skin cancers in 24 U.S. states between 1984 and 1995 to determine the【C12】______of sunlight on the disease.【C13】______surprisingly, they found more deaths form skin cancer in sunnier【C14】______but the number of people who died from the other cancers was lower in the【C15】______areas. Working【C16】______in a sunny climate was also associated with【C17】______breast and colon cancer deaths but not【C18】______the other cancers. Freedman said more research is needed to【C19】______the association between sunlight and【C20】______cancers.
【C2】
选项
A、potential
B、protective
C、insufficient
D、effective
答案
B
解析
空格所在句子大意为:但阳光对某些癌症却有一定——作用。各个选项的意思为:potential“潜力”;protective“保护的,防护的”;insufficient“不足的”;effective“有效的”。根据句意和各个选项的意思可知,正确答案是B。
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