The radiation of uranium was then regarded assecret ofnature.A. a;the B. a;a C. the;the D.

发布时间:2020-08-17 14:41:01

The radiation of uranium was then regarded as    secret of    nature.
A. a;the
B. a;a
C. the;the
D. a;/

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A. a;the
B. a;a
C. the;the
(答案→)D. a;/
解析:本题考查冠词的基本用法,单数名词表示泛指,用不定冠词。nature 为不可数名词,不用冠词。
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