铁路局（）应安排一次辅修或A1级检修的质量对规。
A.每月
B.每季
C.每半年
D.每年
参考答案：C
心脏左前斜位摄片，身体冠状面与胶片夹角为（）
A.20～25°
B.30～35°
C.40～45°
D.50～60°
E.60～70°
The previous lecture focused on the reading problems in new words, while this lecture will turn to
_______ in complex sentence structures. [ ]
A. that
B. one
C. those
D. ones
