They did not stop fighting_____ there was no enemy left.
A.until
B.after
C.when
D.since
答案:A
下列属于掷远游戏的是().
A、投靶比准
B、对墙掷球反弹比远
C、投沙包比准
甲状腺素是指()
A.血清TT3
B.血清rT3加血清TT4
C.血清TT4
D.血清rT3
E.血清FT4