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职称英语
They took ______ measures to prevent poisonous gases from escaping.A、efficientB
They took ______ measures to prevent poisonous gases from escaping.A、efficientB
游客
2025-04-03
14
管理
问题
They took ______ measures to prevent poisonous gases from escaping.
选项
A、efficient
B、beneficial
C、valid
D、effective
答案
D
解析
effective a.有效的,效果好的,得力的;(法律、规章等)生效的。efficient a.效率高的,有能力的。beneficial(to/for)a.有利的,有益的,有好处的。valid a.有效的,有法律效力的;有根据的,有理的。
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