为什么电气设备着火时要先切断电源?
()is where delicious food is cooked. ["The funnel","The messroom","The galley","The satellite anternna"]
下列哪一项属于劳动力的生产间接费用?() ["生产费用","教育费用","工时损失费用","社会公共支出"]
电子汇票仍有可能发生克隆、丢失、公示催告。
()is housed in a plastic dome for weather protection. ["The funnel","The messroom","The galley","The satellite anternna"]
为什么要采用变压器并联运行方式?