拔牙后多长时间内不宜漱口（）
A.24小时
B.1～2天
C.2～3天
D.4～5天
E.5～7天
参考答案：A
— I'm sorry I didn't attend your birthday party because my mother was ill.
— ______. Is your mother better now? [ ]
A. Forget it
B. Go ahead
C. Come on
D. Take your time
下列传输速率最高的介质是( )。
A．细同轴电缆 B．粗同轴电缆C．双绞线 D．光导纤维
