题目

一（1）班有27名男生，20名女生，男生比女生多多少人？ 答案：【答案】27－20=7（人）【解析】根据求一个数比另一个数多（或少）多少，用减法求解。 Last week, only two persons came to look at the house, ________ wanted to buy it． [　　] A． none of them B． both of them C． none of whom D． neither of whom