分析 本文大意:也許很容易說(shuō)植物與動(dòng)物不同,任一孩子能講出一棵樹(shù)和一只狗的區(qū)別.但那些區(qū)別遠(yuǎn)比它們看上去的要深. 組成植物的細(xì)胞是不同的,換句話說(shuō),植物的細(xì)胞壁有特殊的東西. 首先不是所有的植物有細(xì)胞壁,另外,基于植物的種類(lèi)細(xì)胞壁有很多不同.細(xì)胞壁在細(xì)胞膜的外面.通常堅(jiān)硬不易破損,但柔韌性的程度不一樣.細(xì)胞壁也多種方法工作來(lái)保護(hù)植物.更重要的是,控制水的出入.
解答 41.答案:C.主旨?xì)w納題.結(jié)合全文及The cells(細(xì)胞) that plants are made up of are different.In other words,the cell wail of plants has something special.組成植物的細(xì)胞是不同的,換句話說(shuō),植物的細(xì)胞壁有特殊的東西.可知,這篇短文主要講植物細(xì)泡壁的相關(guān)知識(shí).因此答案是C.
42.答案:C.細(xì)節(jié)理解題.根據(jù) there are many differences of a cell wall based on the kinds of plant.基于植物的種類(lèi)細(xì)胞壁有很多不同,可知答案選C.
43.答案:D.推理判斷題.根據(jù)It is usually hard通常堅(jiān)硬,可知與"bent彎曲的,腐敗的"意思接近的是skin-broken表皮破損的,答案選D.
44.答案:B.細(xì)節(jié)理解題.根據(jù)Cells that make up the trunk of a tree are clearly less flexible than cells on a leaf.組成樹(shù)干的細(xì)胞很明顯沒(méi)有樹(shù)葉的細(xì)胞柔韌,可知用not so flexible as不像…一樣柔軟.答案選B
45.答案:D.細(xì)節(jié)理解題.根據(jù) More importantly,they control the water that goes in and out.更重要的是,控制水的出入,可知答案選D.
點(diǎn)評(píng) 考查科普知識(shí)閱讀,這類(lèi)題型首先要理解文章大意,抓住重點(diǎn)語(yǔ)句,聯(lián)系上下面,根據(jù)問(wèn)題選出正確答案.
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