第二产程延长是指经产妇超过2小时,初产妇超过1小时尚未分娩。
参考答案:错
—Tom, what about going for a picnic in the national park tomorrow?
—________. It is just opened to the public. I am looking forward to it.[ ]
A. Up to you
B. That's all right
C. No kidding
D. Sounds fantastic
下列变化中,吸收的热量是用于克服分子间的作用力的是( )
A.加热金属铁使之熔化
B.加热晶体碘使之变成蒸气
C.加热碘化氢使之分解
D.加热金刚石使之熔化