问题
选择题
— Do you mind if I use your English dictionary?
— ______. [ ]
A. No, go ahead
B. Sure, please do
C. Yes, of course not
D. No, you may not
答案
答案：A
搜题请搜索小程序“爱下问搜题”
— Do you mind if I use your English dictionary?
— ______. [ ]
A. No, go ahead
B. Sure, please do
C. Yes, of course not
D. No, you may not
答案：A
变形为加权算术平均指数时的权数是（）。