Crisis would be the right term to describe the ______ in many animal species.

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问题 Crisis would be the right term to describe the ______ in many animal species.

选项 A、minimization
B、restriction
C、descent
D、decline

答案D

解析 本题为名词词义辨析题。restriction意为"限制,约束";minimization意为"减到最小量或最低限度";descent一般指"(位置或高度的)下降";decline指"(数量或程序上的)减少、衰退"。根据题意,此处应选一个含"减少、下降"之意的词。故选项decline为正确答案。
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