I am very tired today. I _____ go to bed early.[ ]
A. should
B. shouldn't
C. can
D. can't
答案:A
如何重叫一条被删除的信息?按压ECAM面板上的()
A.CLR电门
B.STS电门
C.ALL电门
D.RCL电门
与病情严重的患者交谈应()
A.≤5ml
B.10~20ml
C.30~50mlD.50~70ml
E.70~90ml