胃溃疡腹痛的规律表现为()。
A.无明显规律性
B.疼痛-排便加重
C.进食-疼痛-缓解
D.疼痛进食-缓解
E.疼痛排便缓解
参考答案:C
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In those days, the old woman __________ sit at the door for hours, waiting for her son to return from abroad.
A.should
B.used to
C.might
D.would
箭头所指的解剖结构是()
A.膈肌角
B.下腔静脉
C.胰头
D.十二指肠
E.肾上腺