阴虚之体外感风温者，较宜选用的药物是（）
A.天冬
B.石斛
C.玉竹
D.墨旱莲
E.黄精
参考答案：C
声音的传播需要______；______不能传声．15℃时，声音在空气中的传播速度是______m/s．
— When shall we meet your cousin at the station?
— His plane took off two hours ago, and it reach at 5 pm.
A．should
B．could
C．must
D．can
