问题
多项选择题
在灾区中使用正压氧气呼吸器全面罩视线不清的故障原因是（）。
A、保明片缺损
B、外界温度高于罩内温度
C、使用前未涂抹防雾剂
D、防雾剂涂抹的不均匀
答案
参考答案：A, C, D
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在灾区中使用正压氧气呼吸器全面罩视线不清的故障原因是（）。
A、保明片缺损
B、外界温度高于罩内温度
C、使用前未涂抹防雾剂
D、防雾剂涂抹的不均匀
参考答案：A, C, D
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