20.A [标题归纳题。这两个姐妹分别被两个家庭收养,最终得以团聚。A项最能体现本文的中心。]
21.D [细节理解题。根据第三段最后一句中的“...dark energy,about 73 percent.”可知,正确答案为D项。原文中的account for与make up同义,表示“占(比例)”。]
22.A [细节理解题。通读全文可知,近年来的观察改变了天文学家对于宇宙演变历史的认识,也就是直到最近天文学家才认识到:dark matter(暗物质) 又称为“cold dark matter”,在宇宙早期结构形成的过程中起主导作用。其他选项的陈述都与原文不一致。]
23.C [推理判断题。根据第五段第二句话可知,暗物质(dark matter) 在宇宙早期结构形成的过程中起着支配的作用。]
24.A [细节推断题。第五段第一句话告诉我们,我们今天的存在应归功于暗物质,即暗物质决定了我们的存在。]
25.C [标题归纳题。全文的内容可以概括为:科学家最近认识到暗物质被证明是存在的一种能量,这种能量正影响着整个宇宙的构成,并主宰着宇宙。]
得分策略
面对较难的阅读材料,该如何下手?(二)
[经典例题]
The latest research suggests that the key factor separating geniuses from the merely accomplished is not I.Q.,a generally bad predictor of success.Instead,it’s purposeful practice.Top performers spend more hours practising their craft.If you wanted to picture how a typical genius might develop,you’d take a girl who possessed a slightly above average language ability.It wouldn’t have to be a big talent,just enough so that she might gain some sense of distinction.Then you would want her to meet,say,a novelist,who coincidentally shared some similar qualities.Maybe the writer was from the same town,had the same family background,or shared the same birthday.
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