留取痰常规标本的方法哪项错误()
A．清晨醒来即刻留取
B．先漱口
C．进食前
D．数次深呼吸后用力咳出气管深处的痰液
E．放于无菌痰盒内
参考答案：E
The great use of school education is not so much to teach you things ___ to teach you the art of learning.
A．as
B．that
C．than
D．but
顾客的意见
