临产后的主要产力为()
A.腹压
B.宫缩
C.肛提肌收缩力
D.盆底肌收缩力
E.骨骼肌收缩力
参考答案:B
12. ---Our teacher is in hospital.
---Oh, really? I ______. ______ visit her.
A.didn’t know , I’ll go and
B.don’t know, I’ll go and
C.didn’t know, I’m going to
D.haven’t know, I’m going to
最终合同付款在设备保证期截止时,在卖方提供相关文件和单证后,买方支付合同价的尾款,一般为合同总价的()。
A.5%
B.7%
C.10%
D.15%