Color-blind people often find it difficult to______between blue and green.

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问题 Color-blind people often find it difficult to______between blue and green.

选项 A、distinguish
B、compare
C、separate
D、contrast

答案A

解析 distinguish“辨别,分辨”,distinguish between或distinguish…from…;compare“比较”,compare with(to);separate“分(隔)开”,separate…from…;contrast“对比;对照”,及物动词或contrast…with…。
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