问题
选择题
–Do you like this flat?
--Not a little. We can’t have ____.
A a worse one B a nicer one C such a bad one D so nice one
答案
答案：B
搜题请搜索小程序“爱下问搜题”
–Do you like this flat?
--Not a little. We can’t have ____.
A a worse one B a nicer one C such a bad one D so nice one
答案：B
的值为()，设从原点经过A(1，-1)到B(2，0)是积分所沿方向。