胸部CT高分辨率扫描主要用于检查（）
A.中心型肺癌
B.气胸
C.胸腔积液
D.胸膜增厚
E.间质性病变
参考答案：E
We have read for an hour. Now let's stop ____a rest. [ ]
A. had
B. have
C. to have
D. having
or an hour. Now let's stop ____a rest. [ ]