分析 本文屬于說明文閱讀,作者通過這篇文章主要向我們描述了單細(xì)胞斑點(diǎn)的進(jìn)化的有關(guān)信息和例子.
解答 32.C.細(xì)節(jié)理解題.根據(jù)第二段This means that,long time ago,a common ancestor of both you and the choanoflagellate evolved in two different directions可知領(lǐng)鞭毛蟲和人類有共同的祖先;故選C.
33.D.推理判斷題.根據(jù)第一段It's hard to imagine how a single-celled blob (單細(xì)胞斑點(diǎn))in the ocean evolved into a fish*a turtle,or eventually a human.2.5billion years ago,lives on Earth were all single-celled.Then,these tiny creatures started getting bigger,evolving into multi-celled blobs that eventually became animals可知文章主要講單細(xì)胞斑點(diǎn)的進(jìn)化;故選D.
34.B.細(xì)節(jié)理解題.根據(jù)第一段Multicellularity is one of the most important steps in evolution,but it's hard to study because tiny blobs in the ocean don't really leave fossils behind可知科學(xué)家研究多細(xì)胞生物的過程難是因?yàn)樗麄冊诤@镎也坏饺魏位还蔬xB
35.A 細(xì)節(jié)理解題,根據(jù)文章Scientist Nicole King thought that the choanoflagellaes used this glue to hold themselves to the surlace of water可知領(lǐng)鞭毛蟲的鈣粘蛋白用于維持身體表面的水;故選A
點(diǎn)評 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力,做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句,和題干進(jìn)行比較,再做出正確的選擇.在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí),要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷.
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