导致阻塞性肺气肿和慢性肺心病占第一位的原因是
A.Ⅳ型肺结核
B.肺尘埃沉着病
C.支气管哮喘
D.弥漫性支气管扩张
E.以上都不是
参考答案:E
The beauty of Hangzhou is ______ what words can describe.
A.less than
B.no more than
C.more than
D.not more than
杜牧生平胸怀大志,曾注「孙子」