置管前导管端有"吱"声，病人突然紫绀、神志消失，随后心跳骤停
A．低渗性脱水B．高渗性缺水C．等渗性缺水D．高血钾E．低血钾
参考答案：D
He ___ at 6:00 in the afternoon. [ ]
A. go home
B. gos to home
C. goes home
D. goes to home
When towing，what is the main reason for using a chain bridle on a wire hawser（）.
A.It makes for an easy connection
B.It gives a spring effect to cushion the shock
C.It eliminates the necessity of a swivel
D.It does not chafe
