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Directions;For each blank in the following passage,there are four choices marked A,B,C and D. Choose the one that is most suitable and mark your answer by blackening the
corresponding letter on the Answer Sheet.
The destruction of habitats(栖息地)all over the world is the primary reason species are becoming extinct(灭绝)or endangered. Houses,highways,dams,industrial buildings,and ever-spreading farms now dominate 21 formerly occupied by forests,deserts,and wetlands. 22 the beginning of European settlement in America, 23 ,over 65,000,000 acres of wetlands have been drained.
One million acres alone vanished 24 1985 and 1995.
Habitat destruction can be 25 or it can be subtle,occurring overa 26 period of time with-
out being noticed. 27 such as sewage from cities and chemical runoff fromfarms,can change the
28 and quantity of water in streams and rivers.To 29 living in a delicately balanced habitat,
this disturbance can be as 30 as the clear-cutting of a rainforest.
31 remaining habitats are carved into smaller and smaller pockets or islands,remaining species are forced to exist in these 32 areas,which causes further habitat 33 These species become less adaptable to environmental 34 ;in fact,they become 35 endangered. Scientists believe that when a habitat is cut by 90%,one-half of its plants,animals and insects will become extinct.
A、both
B、in
C、between
D、before

答案是:C

解析：

出自 十大正规体育平台官方正版 > 英语 >  2018年十大正规体育平台官方正版专升本《英语》十大正规体育平台官方正版试卷与答案

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1、具有激素和神经递质双重性的物质是
2、交感神经兴奋引起的效应是
3、副交感神经节后纤维末梢释放的递质是
4、最有利于体内信息传递同步化的部位是
5、眼在视近物时发生的调节过程是

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