我国B股目前采用T+3回转交易和T+0交收。( )
参考答案：错
解析： 我国B股目前采用T+1回转交易和T+3滚动交收。本题的表述错误。
若m2+6m=5，则代数式5m2 - [5m2 - (m2 - m) - 7m - 5]的值是 .
Either you or one of your students _____ to attend the meeting that is due tomorrow. [ ]
A. are
B. is
C. have
D. be
