胎头受压胎盘功能减退脐带受压
A.早期减速
B.变异减速
C.晚期加速
D.缩宫素激惹试验（+）
E.无激惹试验有反应型
参考答案：A,D,B
We found ______ very difficult for the children to understand what the chairman said at the meeting.
A．that
B．its
C．this
D．it
“爆米花”细胞
