Before the final examination,many students have shown

      of tension.Some have trouble in sleeping while others have lost their appetite(胃口).

A．anxiety

B．marks 

C．signs

D．remarks

下列哪项不符合正常胎盘剥离情况

A．子宫体变硬呈球形

B．宫底向上升达脐上

C． * * 口外露脐带自行延长

D．向下压迫宫底脐带延长

E．耻骨联合上方轻压子宫下段，脐带不回缩