氧化炉点火用（）。A.甲烷 B.乙炔 C.氢气 D.氧气_爱下问搜题

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问题单项选择题

氧化炉点火用（）。

A.甲烷

B.乙炔

C.氢气

D.氧气

答案

参考答案：C

完形填空

完型填空。
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判断题

通常电灯接通的越多，总负载电阻越小。