设集合A={a,b},B={0,1},则从集合A到集合B的不同映射共有_____ 发布时间:2017-04-19 16:25 │ 来源:www.tikuol.com 题型:填空题 问题: 设集合A={a,b},B={0,1},则从集合A到集合B的不同映射共有______个.
题型:填空题 (2013·高考湖南卷)The university estimates that living expenses for international students________around $8,450 a year,which________a burden for some of them.A.are;isB.are;areC.is;areD.is;is 查看答案