A.Numerous grown plants are the favorites of plant-eaters.
B.The extinction of the African elephant has nothing to do with the ecosystem.
C.Quantities of plants are consumed by African elephants,including branches and bushes.
D.The forest floor in tropical forests is scarcely dotted with new shoots.
答案:C
解析:考查正误判断。根据第二段中的“In its continuous search for the 300 pounds of plants it must have every day,it kills small trees and bushes,as well as pulls branches off big trees”可知,C项正确。
8.The passage is developed mainly by .
A.presenting the changes in time order
B.making comparisons and giving examples
C.classifying similarities and differences
D.showing the effect and then explaining the reasons
答案:D
解析:考查文章结构。全文的内容结构为:首段概括介绍非洲象对非洲大草原生态系统的巨大影响,第二、三段具体说明在哪方面、怎样影响了生态环境,第四段科学家对非洲象已成为濒危物种的担心呼应首段的内容,故选D项。
Ⅱ.七选五
A small mammal lives in the rocky cliffs(峭壁) of Tian Shan,a mountain range in northwest China.But scientists don’t know much about this tiny creature known as the Ili pika.1.
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