哪几种保护动作直流系统会重启动（）。
A.行波保护
B.直流线路纵差保护
C.双极中性母线差动保护
D.换流器差动保护动作
参考答案：A, B, C
治疗痰饮眩晕，宜选用( )
A．疏散风热，清利头目B．疏散风热，息风止痉C．疏散风热，解毒透疹D．疏散风热，清肝明目E．疏散风热，疏肝解郁
–If you can wait for a moment, I can help you with the problem.
–Thank you for offering help, but I think I can _______ it.
A．do
B．make
C．try
D．manage
