GPS卫星距地面距离大约是()
A.20200千米
B.20200米
C.2020千米
D.2200千米
参考答案:A
贝壳类药入汤剂的用法是一般需()
A.先煎
B.后下
C.包煎
D.另煎
E.冲服
I ______ basketball with him yesterday afternoon. He did much better than me. [ ]
A. was playing
B. played
C. would play
D. had played