A:①③
B:①④
C:②③
D:②④
已知不等式x-2ax+b>0的解集为-1,2,m是二项式ax-bx26的展开式的常数项,那么maa7+2b7=( )
我国社会主义民主政治的根本保证是( )
A. goes swimming B. watches TV C. plays football
D. rides a bike E. has Music
Li Hua's Weekend(周末)
Morning
Afternoon
Saturday
⒈ ____
⒉ ____
Sunday
⒊ ____
⒋ ____
— did you go?
—I went to Beijing with my parents.