直流电机换向极绕组出线端用（）表示。
A.H1，H2
B.S1，S2
C.B1，B2
D.T1，T2
参考答案：A
.---This _____ John's house .It's number 101.
--- I don't think so.He said a large white house but this is a small yellow one.
A．can't be
B．must be
C．may not be
D．should be
民事责任以惩罚加害人为目的。( )
