口疮病证包括()。
A.燕口疮
B.鹅口疮
C.白喉
D.雪口
E.喉风
参考答案:A, D
Liu Xiang, I have to say, is highly occupied. He is not_____ for any interview at the moment.
A.convenient
B.responsible
C.reasonable
D.available
下列日常生活中,利用物质化学性质的是