阅读理解Cancerisfearedbyeveryone.Andthereismoreandmorefearaboutcancer.Not

阅读理解 Cancer is feared by everyone. And there is more and more fear about cancer. Not the disease itself — there is no such thing as a high incidence rates(发病率) of cancer. Except for lung cancer, mostly caused by cigarette smoking, the incidence rates are not on the rise. However, some kinds of cancer are decreasing. But the fear of cancer is catching, and the country stands at risk of an anxiety. The earth itself is coming to seem like a huge carcinogen(致癌物). The ordinary, more or less, scientific statement that something between 80 and 90 percent of all cancers are due to things in the environment is taken to mean that none of us will be safe until the whole environment is “cleaned up.” This is not at all the meaning.The 80-percent calculation is based on the unthinkable differences in the incidence of cancer in various societies around the world — for example, the high incidence of liver cancer in Africa and the Far East, stomach cancer in Japan, breast cancer in Western Europe and North America, and the relatively low figures for breast cancer in Japan and parts of Africa and for liver cancer in America. These data show there may be specific environmental influences, but largely based on personal life-style, which determines the incidence of various forms of cancer in different communities — that is all the data suggest. The overall incidence of cancer, counting up all the cases, is probable roughly the same everywhere.1.According to the passage, the incidence of cancer is generally believed _____.A.to be based on inactive life styleB.to be due to anxietyC.to result from environmental influencesD.to be caused by heavy smoking2.It can be inferred from the passage that the writer’s opinion about the relationship between cancer and environment is _____.A.positiveB.negativeC.neutralD.approving3.According to the passage, the writer seems to feel that _____.A.the risk of catching cancer is on the riseB.the whole earth is coming to seem like a huge carcinogenC.the risk of catching cancer isn’t so great as people thinkD.cancer can be cured if the environment is cleaned up4.Which of the following would be the best title for the passage?A.Cancer and EnvironmentB.The Fear Caused by CancersC.Data on Cancer IncidenceD.Cancer and its Investigation

CBCA解析文章谈论了癌症与环境的关系，同时分析了各种癌症出现的地区和可能的原因。1.细节题。根据第1段倒数2,3行scientific statement that something between 80 and 2.90 percent of all cancers are due to things in the environment可知很多癌症都是因为环境的问题。3.推理题。根据第一段2,3行Except for lung cancer, mostly caused by cigarette smoking, the incidence rates are not on the rise.文章最后一段中的癌症与人的生活方式有关的说法以及全文的语气，我们可看出C符合作者的意思。4.主旨大意题。文章的中心就是谈论癌症与环境！

就是这个解释