临产的标志为______、______、______、______。
参考答案：规律宫缩‖进行性宫颈管消失‖宫口扩展‖胎先露下降
The moment _____ Leo will never forget is _____ Mr. Smith gave him a lot of valuable advice on how to improve his writing.
A．that; that
B．when; that
C．when; /
D．that; when
黄遵宪诗日："国初海禁严，立意比驱鳄，借端累无辜，此事实大错。"这首诗批判的是（）。
A.重农抑商
B.闭关锁国
C.均输平准
D.朝贡贸易
