心肺脑复苏时最常用、最有效的药物是（）。
A.阿托品
B.胺碘酮
C.利多卡因
D.肾上腺素
E.碳酸氢钠
参考答案：D
The new appointment (任命) of our president _________ from the very beginning of the next semester.
A．takes effect
B．takes place
C．takes turns
D．takes part
