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厂区应()时进行除虫灭害工作,要采取有效措施防止鼠类、蚊、蝇、昆虫等的聚集和滋生。

更新时间:2024-11-24 05:31:22
A、不定期
B、定期
C、定期或在必要
D、必要
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正确答案:

C

答案解析:

暂无解析

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