下列一元二次方程中没有实数根是 [ ]
A.x2+3x+4=0
B.x2-4x+4=0
C.x2-2x-5=0
D.x2+2x-4=0
答案：A
初产妇，妊娠40周，滞产，产钳助产4000g女婴，胎盘娩出后 * * 流血，量时多时少，检查子宫软，本例应诊断为
A．胎膜残留
B．软产道损伤
C．胎盘残留
D．子宫收缩乏力
E．凝血功能障碍
What do you _______ soap operas? I can't stand them.
A. do
B. like
C. think
D. think of
