下列疾病常表现为湿性咳嗽,但应除外哪一项()。
A.慢性支气管炎
B.胸膜炎
C.支气管扩张
D.肺脓肿
E.空洞型肺结核
参考答案:B
Your parents are both teachers, ______ they? [ ]
A. are
B. aren't
C. do
D. don't
现场拍照有哪些要求?