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Scientists who believe cell phones are dangerous have been throwing out hypotheses to explain away the negative results. Maybe s
Scientists who believe cell phones are dangerous have been throwing out hypotheses to explain away the negative results. Maybe s
admin
2012-05-04
37
问题
Scientists who believe cell phones are dangerous have been throwing out hypotheses to explain away the negative results. Maybe something about the【C1】______animals raised their rates of cancer or sperm problems, so【C2】______the exposed animals didn’t seem to be harmed. Maybe the studies should have used pulsed,【C3】______radiation rather than a continuous beam, the better to【C4】______the way we actually use mobile phones. Maybe it matters【C5】______the lab animals are zapped【C6】______in a device like a Ferris wheel or while【C7】______around in cages. On the other hand, if these details do【C8】______, maybe that in itself is significant.
Scientists who【C9】______claims that cell-phone radiation is causing an epidemic of brain cancer【C10】______that there isn’t any mechanism.【C11】______textbook biophysics, only radiation that has enough energy to ionize molecules—that is, knock off electrons—can【C12】______cancer. Cell phones don’t【C13】______energy great enough to ionize molecules in living cells. Their【C14】______is "far below the cancer energy threshold,"【C15】______physicist Robert Park of the University of Maryland, who often【C16】______junk science. But whenever he makes that【C17】______in his What’s New e-newsletter, he gets【C18】______with angry responses insisting there are other ways low-energy radiation can【C19】______. "I don’t like cell phones and I don’t like writing about cell phones," says Park, "【C20】______the damned issue just won’t go away. "
【C2】
选项
A、by comparison
B、expectedly
C、frankly speaking
D、indeed
答案
B
解析
词义辨析题。by comparison相比而言;expectedly可以预见地;frankly speaking坦白地讲;indeed的确。
转载请注明原文地址:https://kaotiyun.com/show/XUmK777K
0
专业英语四级
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