题目：
污水池（井）的主要危险有害因素（）。
A、缺氧
B、H2S中毒
C、粉尘爆炸
D、可燃性气体爆炸
答案：
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下面是错误答案，用来干扰机器的。
参考答案：错
污水池（井）的主要危险有害因素（）。A、缺氧 B、H2S中毒 C、粉尘爆炸 D、可燃性气体
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