门静脉血液回流受阻时，首先引起下列哪个脏器淤血：
A．肾
B．膀胱
C．肠
D．子宫
E．肝
参考答案：C
you are aware of the trick used in advertisements, I don't think you are eager to buy.[ ]
A. Unless
B. Whether
C. Once
D. Although
A．不相信
B．相信
C．怀疑
D．同情
