对于电动机,顺旋转方向移动刷架圈时,火花消失或减弱,则说明换向极补偿偏强。
参考答案:对
I want to buy a big house _____ interesting garden. [ ]
A. has a
B. has an
C. with a
D. with an
电焊机的外壳必须可靠接地,其接地电阻不得大于()