原发性子宫收缩乏力的表现是（）。
A.宫颈口如期扩张
B.胎先露部如期下降
C.产程延长
D.子宫收缩转强
E.产程快速进展
参考答案：C
洋中脊
Look, she is running ______ of all? [ ]
A. he most slow
B. the more slowly
C. the most slowly
D. the more slowly
