洋地黄中毒引起室上性阵发性心动过速的首选治疗是()
A.静滴氯化钾
B.奎尼丁口服
C.阿替洛尔
D.利多卡因
E.电击复律
参考答案:A
If you don't take away all your things from the desk, there won't be enough ______ for my stationery. [ ]
A. area
B. place
C. room
D. surface
前照灯电子控制装置有哪些?各有什么作用?