题目内容

无功功率是表示电感元件建立磁场能量的平均功率。()

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建筑高度大于24m的住宅属于高层建筑。()

生产和在建矿井必须制定并上、下防灭火措施。()

If a small fire initially breaks out in the engine room bilges, in which of the following

A. Fixed CO2, semi-portable CO2, then hand portable CO2
B. Semi-portable CO2, fixed CO2, then hand portable CO2
C. Hand portable, semi-portable CO2, then as a last resort the fixed CO2 system
D. Hand portable, fixed CO2, then as a last resort the semi-portable CO2

若干个电容器串联时,电容越小的电容器所带的电荷量也越少。()

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