When separating lube oil separator, the optimal separating quantity is()of the rated quantity on name plate. ["100%","1\/2","1\/5","1\/3"]
按照“()、()、()、()”的要求,积极引导农户做好品种选择。
If ignited,which material would be a class B fire?() ["Magnesium","Paper","Wood","Diesel Oil"]
以下哪个不是反馈() ["A.聆听","B.微笑","C.身体前倾","D.对于将来的建议"]
什么是焦耳-楞次定律?
固定式失火报警系统用于机舱火警和()、()、()等舱室火警,使用感温式和感烟式两种探头。