一般情况下，CT图像上正常人膀胱壁的厚度为（）
A.<1mm
B.<2mm
C.<3mm
D.<4mm
E.>5mm
参考答案：C
---I’m sorry. I _________ at you the other day.
---Forget it. It was a bit out of control myself.
A．shouldn’t shout
B．shouldn’t have shouted
C．mustn’t shout
D．mustn’t have shouted
李夫人已有两个儿子，现今又怀孕，此胎是女儿的机率为（ ）
A．100%
B．50%
C．25%
D．0%
