题干
The company wants to a school for the poor children．
A：put off
B：set up
C：call in
D：look after
答案(点此获取答案解析）
B
The company wants to a school for the poor children．
A：put off
B：set up
C：call in
D：look after
，0）且与圆C：
存在公共点，则k2≤
的概率为