若单相桥式整流电路中有一只二极管已经短路，则该电路（）。
A、不能工作
B、仍能正常工作
C、输出电压下降
D、输出电压上升
参考答案：A
党参的功效是：益气，填精，补髓。
—Excuse me, sir. Would you do me a favour?
—Sure. What is it?
—I _________if you could tell me how to pronounce this English word.
A．had wondered
B．was wondering
C．would wonder
D．did wonder
