引起干性咳嗽常见的疾病是（）
A.胸膜炎
B.肺炎
C.肺结核
D.支气管扩张
E.二尖瓣狭窄
参考答案：A
______the doors were closed and that all the lights were off, the boy left the classroom.
A．Check
B．To check
C．Checked
D．Having checked
大型机床，矩形多段床身，各段床身接缝处要用（）mm规格的塞尺，不得插入。
A.0.02
B.0.03
C.0.94
D.0.05
