_______ one old lady, the bus was empty.
A.Except
B.Except for
C.But
D.Besides
答案:B
第一产程是指:
A.宫缩5~6分钟1次,持续30秒到宫口开全
B.宫口扩张,宫缩10~15分钟1次,持续40秒,到宫口开全
C.宫口扩张到宫口开全至胎儿娩出
D.规律宫缩,宫口开全,胎儿娩出,胎盘娩出
E.宫口扩张到宫口开大3cm
刀具标注角度坐标系和工作角度坐标系有何不同?