设M={a,b,c},N={﹣2,0,2},从M到N的映射满足f(a)>f(b)≥f(c),这样的映射f的个数为( )
A.1 | B.2 | C.4 | D.5 |
更新时间:2018-10-14 02:01:48
|
A.1 | B.2 | C.4 | D.5 |