问题
多项选择题
氢火焰未点燃时，“放大器调零”不能使放大器的输出调到记录仪的零点的故障原因是（）.
A、放大器失调
B、离子室的收集极与外罩短路或绝缘不好
C、放大器高阻部分受潮或污染
D、收集极积水
答案
参考答案：A, B, C, D
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氢火焰未点燃时，“放大器调零”不能使放大器的输出调到记录仪的零点的故障原因是（）.
A、放大器失调
B、离子室的收集极与外罩短路或绝缘不好
C、放大器高阻部分受潮或污染
D、收集极积水
参考答案：A, B, C, D
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