one third of population和one third of country的谓语为什么不同?为什么one third of population用ARE,而one third of country用IS ?

one third of one-third of z one third of population和one third of country的谓语为什么不同?为什么one third of population用ARE,而one third of country用IS ? one third one third one third 英语句子：是one third them还是one third of them?这两个有什么区别? one third of student are还是is girls? 英文短语one-third of的用法one-third of ＋名词 后be动词的单复怎麽用? One-third of the students in this class are girls.这句中的主语为什么是One-third? one percent of 100 sheep 是单数还是复数?RT那么 one third of 3 sheep march is the third month of a year.___ ___ is the third one of a year? one- third less than how much is 4 multiplied by the difference of one-half and one third? I like neither of the two books.Please showme (a third) one.这里为什么要填a third? one ...another...a third...还是the third －－of the population of this country are famers. A.First three B.One third what will waste one third of time of person's life?