用药前应进行皮肤过敏试验的药物是（）。
A．利多卡因
B．丁卡因
C．布比卡因
D．普鲁卡因
E．罗哌卡因
参考答案：D
既能温中回阳，又可温肺化饮的药物是
A．煨姜B．生姜C．良姜D．炮姜E．干姜
The ARQ mode should be applied（）.
A.when two stations communicate with each other
B.in any radio system and at any time
C.when one ship sends a message to another station
D.for communication among some stations
