分析 本文主要介紹了人類的嗅覺基因和嗅覺系統(tǒng).科學(xué)家們通過研究嗅覺基因和嗅覺系統(tǒng)是如何工作的,發(fā)現(xiàn)了嗅覺在我們的生活中起著非常重要的作用.
解答 63.C 細(xì)節(jié)理解題.根據(jù)第三段These two scientists were the first to describe the family of 1,000olfactory (嗅覺) genes and to explain how our olfactory system works.可知理查德•阿克塞爾和琳達(dá)•巴克研究了家庭嗅覺基因并解釋了我們的嗅覺系統(tǒng)是如何工作的.由此推知,這兩位科學(xué)家發(fā)現(xiàn)了人類嗅覺系統(tǒng)的本質(zhì).故選C.
64.C 細(xì)節(jié)理解題.根據(jù)第五段Similarly,the smells of lemon and coffee appeared to promote clear thinking and mental focus.可知喝咖啡有助于提高思考和注意力.故選C.
65.C 推理判斷題.根據(jù)最后一段their study shows that nearly every human being shows a different pattern of active and inactive smell-detecting receptors.可知不同的人對不同的氣味敏感.故選C.
66.B 主旨大意題.本文主要介紹了嗅覺基因和嗅覺系統(tǒng).研究者發(fā)現(xiàn)嗅覺在我們的生活中起著非常重要的作用.故選B.
點(diǎn)評 本文考察學(xué)生的理解推斷能力以及細(xì)心程度,只要抓住文章的關(guān)鍵詞,采用尋讀的方法查找細(xì)節(jié),就能找到正確答案.
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增加:在缺詞處加一個漏字符號(∧),并在其下面寫出該加的詞。
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