电源电压正常,电动机不能起动的原因包括:引线开路,引线绕组断路不通;离心开关触点合不上或接触不良;轴承卡住;电容器开路等。()
参考答案:对
Mr.Blake is very popular because of his good __________ of humor.
A.sense
B.emotion
C.feeling
D.thought