He got a letter from his father _____ Monday morning. [ ]
A. of
B. in
C. on
D. for
答案:C
女,30岁。孕36周,合并室间隔缺损,2天前"鼻塞、咽痛"后出现胸闷、气短,咳少量粉红色泡沫痰,不能平卧。首先应考虑患者合并()
A.上感
B.急性肺炎
C.急性右心衰
D.急性气管炎
E.急性左心衰
水泥砂浆面层如遇管线等局部面层厚度减薄处在20mm以下时,必须采取防止开裂措施。( )