分析 本文主要向我們介紹了核能對我們健康的危害.核能對人類的健康、安全乃至生命所造成的危害可用一個單詞加以概括:輻射.核輻射無法被人類的感官所感知,它會傷害一個人而受害者不知道.如果一個人遭受了核輻射,他可能在若干年后死于癌癥,又或者是生了一個天生弱的孩子,更嚴重的是可能會立即死亡.
解答 51.C 細節(jié)理解題.由第一段Nuclear power's danger to health,safety,and even life itself can be summed up in one word:radiation.可知核電最危險的因素是輻射.故選C.
52.B 細節(jié)理解題.由第二段可知核輻射不同于普通的無線電波,它無法被人類的感官所感知,它對人類和其他生物是有害的.故選B.
53.D 推理判斷題.由第三段At very high levels,radiation can kill an animal or human being immediately by killing masses of cells in vital organs.可知輻射通過殺滅重要器官的大量細胞來殺害動物或人類.故選D.
54.A 細節(jié)理解題.由第四段This is another reason for some of the mystery about nuclear radiation.Serious damage can be done without the victim being aware at the time that damage has occurred.A person can be irradiated(輻射 )and feel fine.可知核輻射無法被人類的感官所感知,它會傷害一個人而受害者不知道.故選A.
55.D 細節(jié)理解題.由第四段then die for cancer five,ten,or twenty years later as a result.Or a child can be born weak as a result of radiation absorbed by its grandparents.可知如果一個人遭受了核輻射,他可能在若干年后死于癌癥,又或者是生了一個天生弱的孩子;由第三段At very high levels,radiation can kill an animal or human being immediately by killing masses of cells in vital organs.可知一個人遭受了核輻射可能立即死亡.由此可知A、B、C項敘述都是對的.故選D.
點評 本文考察學(xué)生的理解推斷能力以及細心程度,只要抓住文章的關(guān)鍵詞,采用尋讀的方法查找細節(jié),就能找到正確答案.
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