安徽省的简称是:
A．赣
B．皖
C．粤
D．闽
答案：B
本题考查我国的行政区。赣为江西省简称；粤为广东省简称；闽为福建省简称。
Mary is ill today. If she _____, she ____ here at school
A．were not ill；would be
B．had been ill；wouldn't have been
C．were ill；should have been
D．hadn't been ill；could be
无菌盘铺好后有效期不应超过( )
A．4hB．8hC．10hD．12hE．24h
