为清醒患者洗胃时,自口腔轻轻插入洗胃管( )
A.20cm~30cm
B.35cm~40cm
C.45cm~50cm
D.55cm~60cm
参考答案:C
—I didn't know this is a one-way street, sir.
—_____. Please show your driving license. [ ]
A. I don't care
B. Sorry, but that is no excuse
C. It's all right
D. I hope so
锚机的工作过程中()阶段的负载转矩基本上保持不变。
A.收起锚链
B.拉紧锚链
C.拔锚出土
D.提锚出水