The sheer diversity of tropical plants represents a seemingly ____ source of raw materials, of which only a few have been utiliz

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问题 The sheer diversity of tropical plants represents a seemingly ____ source of raw materials, of which only a few have been utilized.

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

答案D

解析 - 方程等号:逗号,前后取同。
- 强词和对应:only a few have been utilized指向空格,根据逗号前后取同,空格填入一个表示“只有很少被使用”含义的单词。exploited被开发利用的,quantifiable可以量化的,controversial有争议的,inexhaustible用之不竭的,remarkable显著的。quantifiable的释义:to find or calculate the amount of(something),是指可以“用数字表示”的含义,与多样性(diversity)无关。因此正确答案选D。
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