单项选择题

倾角较大的下山盲巷进行瓦斯检查时,应重点检查()。
A、甲烷
B、二氧化碳
C、氧气
D、其它气体

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During the Songhua River water pollution incident, the government's information notification and release was not timely, resulting in adverse consequences not including _________

A．Public poisoning
B．Rumors
C．Delay in disposal
D．Public panic

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维生素E和微量元素硒缺乏均可引起雏鸡出现渗出性素质病。
A、正确
B、错误