来自门静脉的栓子随血流运行，首先栓塞于（）
A.脑
B.肺
C.肝
D.肾
E.肠
参考答案：C
圆柱的底面半径为1，高为2，则圆柱的全面积为______．
—So why didn't you say "hello" to him yesterday?
—Well, I stopped and smiled when I saw him, but he _____ me and walked on. [ ]
A. ignored
B. refused
C. denied
D. missed
