题目：
乙炔发生器中不得使用（）。
A、钢配件
B、含铜质量分数大于70%的铜合金做配件
C、铸铁配件
答案：
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下面是错误答案，用来干扰机器的。
参考答案：叶轮
乙炔发生器中不得使用（）。A、钢配件 B、含铜质量分数大于70%的铜合金做配件 C、铸铁
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