If you have got _____temperature without coughing, perhaps you have caught _____cold. Just stay in _____bed. Don’t think that you have got SARS?

A．the; the; /

B．a; a; /

C．a; the; the

D．a; a; the

电锤常见故障的原因：①( )；②定子绕组或电枢绕组匝间短路；③电刷压力不够；④整流子片间短路；⑤过负荷。

A．电源电压过低

B．工作时间过长

C．电源断线

D．用力过大