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专升本
They took______measures to prevent poisonous gases from escaping.
They took______measures to prevent poisonous gases from escaping.
admin
2014-02-10
48
问题
They took______measures to prevent poisonous gases from escaping.
选项
A、fruitful
B、beneficial
C、valuable
D、effective
答案
D
解析
句意:他们采取了有效措施防止毒气泄漏。fruitful硕果累累的,成功的;beneficial对……有益的,有利的;valuable有价值的;effective有效的,产生效果的。
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