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