比1/4大，比7/10小且分母是40的最简分数有（）个。按从小到大的顺序排列是5f6c9z:h7k(X3y'\'^)Z7A7C(@,M*j5m7L,n6l){6n2M)w1T9r6S8u8R,R7F2k*`'D2g3@6c)C4V+?6[)j4S。'E3P;v:^2s,S3~;Z3q7J-^'A