题目

已知，求代数式的值． 答案：原式=解析:解： ……………………………………………………………1分=[]       ………………………………………………2分……………………………………………………………………3分…………………………………………………………………………………4分由,得 ． ∴原式=．— ______ of foreigners begin to learn Chinese. —Right. _____ of them ______ increasing little by little. A. A number; The number; is B. The number; The number; are C. A number; The number; are D. A number; A number; is