三相异步电动机DMSB系列电动机为采煤机用水冷电动机。（）
参考答案：对
—How quiet it is here!
—Yes. We can hear nothing but the _____ of the running water.[ ]
A. music
B. sound
C. voice
D. noise
测温盒的容量不得小于（）
A.150ml
B.100ml
C.200ml
