What does paragraph 6 tell us?A.Ants bring about
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What does paragraph 6 tell us?
A.Ants bring about a negative influence to an area when their population is small.
B.Ants bring about a positive influence to an area when their population is small.
C.Ants’ predation counteracts the positive influence they may have on an area.
D.At higher density,ants produce a positive influence on an area.
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答案:B
文章第六段主要是说蚂蚁数量少的话,其他动物的品种和数量就会增加,从而会给环境带来积极的影响。如果蚂蚁数量大,就不可能产生同样的影响,或是产生相反的影响。选项B是正确的。
