随产程时间延长，下列哪种体征不会出现
A．OCT提示胎心率减速
B．羊水清亮
C．宫缩减弱
D．胎心突然消失
E．耻骨联合上方压痛
参考答案：B
中变催化剂的放硫是什么回事？
People have realized that they should go on __ balanced diet and do _____ exercise every day.
A．a; /
B．the; an
C．the; the
D．/; an
