痰中有支气管管型常见的疾病是（）
A.支气管哮喘
B.肺脓肿
C.慢性支气管炎
D.肺结核早期
E.晚期肺癌
参考答案：C
直接灭火法的操作应注意什么？
We bought _____ a present, but _____ didn't like it. [ ]
A. they ; them
B. them; they
C. themselves; their
D. theirs; they
