分析 科學(xué)家通過對(duì)老鼠的研究發(fā)現(xiàn),要照顧幼仔的母鼠比沒有幼仔照顧的老鼠在記憶力和技能方面表現(xiàn)更好,他們大腦的變化表明他們可能不會(huì)患早老癡呆癥,科學(xué)家們由此得出的結(jié)論是女性荷爾蒙能夠預(yù)防老年癡呆.
解答 66.C.細(xì)節(jié)理解題.文章開頭提出研究結(jié)果,即 Motherhood may make women smarter and may help prevent dementia(癡呆) in old age by bathing the brain in protective hormones,然后講述了Tests on rats show that…,由此可知科學(xué)家是通過在老鼠身上做實(shí)驗(yàn)得出這樣的結(jié)論,所以 B選項(xiàng)正確.
67.B.細(xì)節(jié)理解題.根據(jù)文中Our research shows that the hormones of pregnancy are protecting the brain,including estrogen可知B為正確選項(xiàng).
68.C.句意理解題.根據(jù)上下文可知,It's rat data but humans are mammals just like these animals are mammals.句意為這是老鼠的數(shù)據(jù),但是人類也像這些動(dòng)物一樣是哺乳動(dòng)物.故人類的數(shù)據(jù)與老鼠的數(shù)據(jù)應(yīng)該是相似的.故選C.
69.B.主旨大意題.本篇文章是科學(xué)報(bào)道,特點(diǎn)是開頭提出中心,在本文中作者開頭提出Motherhood may make women smarter and may help prevent dementia in old age by bathing the brain in protective hormones,U.S.researchers reported on Thursday.然后圍繞這一實(shí)驗(yàn)結(jié)果進(jìn)行詳細(xì)的敘述,由此可知最佳答案為B.
點(diǎn)評(píng) 本文是一篇科教類閱讀,題目涉及多道細(xì)節(jié)理解題,句意理解題,主旨大意題.做題時(shí)學(xué)生應(yīng)仔細(xì)閱讀原文,把握文章主要內(nèi)容,聯(lián)系文章上下文內(nèi)容并結(jié)合所給選項(xiàng)含義,從中選出正確答案,一定要做到有理有據(jù),切忌胡亂猜測(cè).
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