—May I speak to the headmaster? —He a meeting now. Can I take a message?
A:is having
B:had
C:has
D:will have
____
嘶哑
喉咙
汹涌
吹刮
已知:25℃时,KspMg(OH)2=5.61×10﹣12,KspMgF2=7.42×10﹣11.下列说法正确的是( )
在长征中对***有起死回生之效的会议是( )