带式输送机的人字形沟槽滚筒有较高的摩擦系数,有良好的驱动性能。
参考答案:对
--- Bill, can I get you anything to drink?
--- .
A.You are welcome
B.No problem
C.I wouldn't mind a coffee
D.Doesn’t matter
胎儿娩出后,因胎盘因素引起的子宫出血,错误的护理措施是( )
A.胎盘已剥离尚未娩出时,按压宫底协助胎盘娩出B.胎盘部分剥离者,可行手取胎盘术C.胎盘部分残留者,可行清宫术 D.胎盘植入者,尽量剥离胎盘E.胎盘嵌顿者,麻醉后手取胎盘