妊娠晚期腹部撞伤后出现腹痛及 * * 出血，胎心消失应首先考虑
A．先兆早产B．脐带脱垂C．前置胎盘D．凝血功能障碍E．胎盘早期剥离
参考答案：E
The 18th National Congress of the CPC has been one of______things in our life recently.
A．important
B．more important
C．most important
D．the most important
导致全球气候变暖（温室效应）的气体是 [ ]
A．二氧化硫
B．臭氧
C．二氧化碳
D．一氧化碳
