问题
选择题
—Do you have an Art Festival ?
—_______. It's on April 19th. [ ]
A. Yes, we don't .
B. No, we don't.
C. No, we do.
D. Yes, we do.
答案
答案：D
搜题请搜索小程序“爱下问搜题”
—Do you have an Art Festival ?
—_______. It's on April 19th. [ ]
A. Yes, we don't .
B. No, we don't.
C. No, we do.
D. Yes, we do.
答案：D
，r(A+AB)=2，则t=（）。