临产后子宫收缩的特点,下列哪项是正确的
A. 宫缩时,子宫体部肌纤维缩短变宽,间歇时完全恢复原来长度
B. 从子宫两角处发动节律性收缩,向子宫底中部集中,再向下扩展
C. 子宫底部收缩力强,子宫下段收缩力最弱
D. 宫缩达高峰,子宫体隆起变硬
下列哪种现象属于临产的诊断依据
A. 渐增性节律性宫缩
B. 宫口进行性扩张
C. 宫颈管消失
D. 阴道流水
You can see many _____ animals in Africa.
A. amazed
B. amazing
C. amaze
D. amazement
This is why we must be _____ about our mission.
A. interested
B. worry
C. urgent
D. pleasant