首页 › 答案 › 题库 › 慕课 › 未分类

About 4.2% of the 1,120 respondents were younger than 20 years, and 26.7% were () 21 and 30 years old.

About 4.2% of the 1,120 respondents were younger than 20 years, and 26.7% were () 21 and 30 years old.
正确答案:between