According to the traffic rules, everyone is supposed ______ a seat belt in the car. [ ]

A. to wear

B. wearing

C. to be worn

D. wear

第二产程延长是指（）

A.总产程超过24小时

B.宫口开大3cm至宫口开全超过8小时者

C.总产程不超过3小时

D.宫口开全后初产妇超过2小时

E.从临产至宫口开大3cm，超过16小时者