| "I have great confidence that by the
end of the decade we’ll know in vast detail how cancer cells arise," says
microbiologist Robert Weinberg, an expert on cancer, "But," he cautions, "some
people have the idea that once one understands the causes, the cure will rapidly
follow. Consider Pasteur. He discovered the causes of many kinds of infections,
but it was fifty or sixty years before cures were available." This year, 50 percent of the 910 000 people who suffer from cancer will survive at least five years. In the year 2000, the National Cancer Institute estimates, that figure will be 75 percent. For some skin cancers, the five-year survival rate is as high as 90 percent. But other survival statistic(统计)rate still discouraging-13 percent for lung cancer, and 2 percent for cancer of the pancreas(胰腺). With as many as 120 v A. Cures for cancer will soon be found if we know how cancer cells arise. B. We’ 11 have to wait fifty or sixty years before we understand the Causes of cancer. C. Even when we understand the causes of cancer, that doesn’t mean we will soon find a cure for cancer. D. We won’t understand the causes of cancer before the end of the decade. 更多"{{B}}第二篇{{/B}} 'I have "的相关试题:我来回答: 提交
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