严寒地区受动荷载作用的焊接结构钢宜选用（）牌号钢材。
A.Q235-AF；
B.Q275-D；
C.Q235-B；
D.Q235-D。
参考答案：D
Which of the following would be an appropriate expected outcome of nursing care for the client with ulcerative colitis
A．The client experiences decreased frequency of constipation.
B．The client accepts that an ileostomy will be necessary.
C．The client maintains an ideal body weight.
D．The client verbalizes the importance of restricting fluids.
电力机车一只轮箍下衬的垫板每块长度为不小于（）。
A.500mm
B.400mm
C.300mm
D.200mm
