In the past, energy sources were thought to be ______, but it was not the case.A

游客2023-09-06  31

问题 In the past, energy sources were thought to be ______, but it was not the case.

选项 A、productive
B、transient
C、eternal
D、boundless

答案 D

解析 过去人们认为能源是无穷无尽的,但事实并非如此。本题是考查形容词的词义辨析。productive“有生产力的,多产的”;transient“短暂的,片刻的”;eternal“永恒的,永久的”;boundless“无限的,无穷无尽的”。
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