Mr. Smith gave the tickets to all the students except _______ who had already seen the movie.
A:the ones
B:ones
C:others
D:the others
0.8=____ 1.4=____ 0.25=____ 0.6=____
设变量x、y满足约束条件:{y≥xx+2y≤2x≥-2,则z=x-3y+2的最小值为( )