腺样囊性癌最常发生远处转移的脏器是
A.脑
B.骨
C.肝
D.肾
E.肺
参考答案:E
Did you finish _____your homework last night?
A.do
B.does
C.doing
D.done
某分部工程双代号网络计划如下图所示,其关键线路有()条。
A.2
B.3
C.4
D.5