_____ the end of the day, they were all tired. [ ]
A. On
B. In
C. At
答案:C
《中国农村的故事》是一首长诗,分为()、()和()三部。
年过70岁老年人,胃切除术后l~3天,输液量过大,点滴速度过快,易发生()
A.切口感染
B.切口裂开
C.肺不张或肺内感染
D.急性肺水肿
E.深静脉血栓形成