rate和proportion有什么区别
问题描述：
rate和proportion有什么区别
答
与proportion搭配的介词是in,比如in the proportion of按…的比例,in proportion成比例,这样的短语,而与rate搭配的介词多为at,如 at a rate of.具体可看下面几个句子：*The unemployment rate is rising in that cou...