reduce the cancer rates里rate是复数,而牛津词典却出现了the divorce rate之类的

来源：学生作业帮编辑：作业帮分类：综合作业时间：2024/05/05 03:14:28

reduce the cancer rates里rate是复数,而牛津词典却出现了the divorce rate之类的.
也就是rate 在使用的时候到底是用复数还是单数,还是什么时候用复数什么时候用单数,希望高手赐教,

单一比率,不可数.不同事物或类型的比例,可数.
就和sport运动一样,单一运动的量,不可数,不同种类的运动,可数.
再问：哦！！！我有点理解了！也就是说癌症有很多种，这么多种癌症一共的癌症率有多少多少所以用复数，而离婚就指一件事情，没有多种，所以就是单数，是这样的吗？？谢谢你啊！！
再答：是这么个意思。

reduce the cancer rates里rate是复数,而牛津词典却出现了the divorce rate之类的 the rate of divorce in America ranks____in the world. birth rates fell below the replacement rate of 2.1 children The incidence rate of cancer mainly stems from several facto interest rate和interest rates的区别英语翻译With the divorce rate over 50 percent,too many are appar In spite of high divorce rate the custom of marriage remains the rate factor the rate capacity effect 英语翻译Factors that Reduce Reading Rate Some of the facts which at almost the same rate the firs－rate team