持续性枕横位发生原因有
A.头盆不称
B.中骨盆偏狭窄
C.胎头俯屈不良
D.羊水过多
E.子宫收缩乏力
参考答案:A,B,C,E
1985年,城市经济体制改革全面展开。城市经济体制改革的重点是[ ]
A.国有企业
B.个体经济
C.民营经济
D.计划经济
It is reported that _______ people in the world are suffering from the H1N1 flu.
A.ten thousand of
B.ten thousands
C.thousands of
D.ten thousands of