Over forty percent of all plant and animal species on the earth live in ______ . The word "constant" (Line 1, Para.3) means ___

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问题 Over forty percent of all plant and animal species on the earth live in ______ .
The word "constant" (Line 1, Para.3) means ______ .

选项 A、frequent
B、gradual
C、continuous
D、quick

答案C

解析 词汇题。题目询问constant(位于第三段首行)的意思是什么。词汇题一般可以根据句意和上下文推断出正确答案。因为“无休止的伐木、采矿和畜牧业导致了亚马逊丛林的逐渐消失”,所以选项C(持续的,不停的)为正确答案。
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