来自包承忠的问题
【electricelectrical区别?data什么时候当成复数?advocate+doing还是todo?sailtheamountof&theamountsof用法区别?amountsof不管加可数不可数谓语动词都用复数？】
electricelectrical区别?
data什么时候当成复数?
advocate+doing还是todo?
sail
theamountof&theamountsof用法区别?
amountsof不管加可数不可数谓语动词都用复数？
