慢性支气管炎最突出的症状是（）
A.长期反复咳嗽、咳痰
B.反复发热
C.咳大量脓痰
D.反复咯血
E.时有喘息
参考答案：A
— Arthur is responsible ______ the newspaper, isn't he?
— ______, but Joyce is. She's the chief editor. [ ]
A. of...Yes, he isn't
B. for...Yes, he is
C. of...No, he is
D. for…No he isn't
Linux系统对普通文件默认的访问权限是 (37) 。
A．-rwxrwx---
B．-rw-rw-r--
C．-rwx------
D．-rw-r--r--
