1.single figure(s) 个位数 加不加s?
问题描述：
1.single figure(s) 个位数 加不加s?
2.effort effert 分别?
3.Except in sectors such as banks,supermarkets,cent money is much less frequently used now.
4.exchange /change 分别?
答
1不加
2一个为努力 一个为影响
3除了在银行和超市里分币都很少使用
4第一个为交换 第二个为变换