"吐下之余,定无完气"是因为()
A.气能生津
B.气能行津
C.气能摄津
D.津能生气
E.津能载气
参考答案:E
—You saw the film Titanic last night, didn't you?
—Yes, _______ I missed the beginning.[ ]
A. and
B. or
C. so
D. but
简述急性化脓性根尖周炎鉴别诊断。