Some ecosystems are more (i)______than others, better able to withstand changes,

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问题 Some ecosystems are more (i)______than others, better able to withstand changes, while other ecosystems are more (ii)______and therefore susceptible to the slightest alteration.

选项

答案 B,D

解析 while说明前后反义重复;therefore说明前后同义重复。两空联动,反义重复;第二空与susceptible(易受影响的)同义重复。stagnant不活泼的,resilient有复原能力的,fragile脆弱的;vulnerable脆弱的,dependent依赖的,ubiquitous普遍的。答案选BD。
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