左肾静脉走行位置是()
A.在腹主动脉后方
B.腹主动脉与肠系膜上静脉之间
C.腹主动脉与肠系膜上动脉之间
D.门静脉后方并伴行
E.以上均不对
参考答案:C
Suddenly I heard a terrible noise ahead. I looked forward _______ what was happening, but found nothing.
A.to seeing
B.to see
C.for seeing
D.and see
正视图为一个三角形的几何体可以是( )(写出三种)。