The diversity of tropical plants in the region represents a seemingly ______ source of raw materials, of which only a few have b

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问题 The diversity of tropical plants in the region represents a seemingly ______ source of raw materials, of which only a few have been utilized.

选项 A、exploited
B、controversial
C、inexhaustible
D、remarkable

答案C

解析 形容词辨析题。inexhaustible表示“取之不尽的”;exploited是exploit的过去分词形式;controversial表示“争论的,争议的”;remarkable表示“不平常的,非凡的,显著的”。根据句意应选[C]inexhaustible。
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