腭裂修复术的后推术,主要适用于()
A.腭垂裂
B.软腭裂
C.不完全腭裂
D.单侧完全性腭裂
E.双侧完全性腭裂
参考答案:B
Liu Xiang’s breaking the record in the Asian Games was an exciting moment, ______ all of us will never forget.
A.one
B.it
C.the one
D.what
下列各组气体在常温下能共存且能用向上排空气法收集的是[ ]
A.NO和O2
B.HCl和NH3
C.H2和CO
D.SO2和CO2