what is one fifth of thirty?

what is one fifth of thirty? What is about 20% of the air?快要答案不要翻译，谢谢 about one fifth of the air is oxygen about four fifths of the air is nitrogen. 两句话帮忙也翻译一下吧，谢谢 One fifth of the population here ( ) farm workers .填is are? That's about one fifth of ( )population one more ,this is the fifth What day is the fifth day of the week?T—不是翻译,是填空. China is the largest developing country ___has more than one fifth of the world's populationA.that B.which C.where D.what答案选A,B为什么不对,请解析,谢谢! The WTO cann't live up to its name ＿ it doesn't include a country what is home to one fifth of mankind.A.as long as B.while C.if D.even though What is the end of one hundred? What is one of then doing?汉译 What is the number that is one half of one quarter of one tenth of 400? Unit one:What a wonderful timeExercise one:Blank filling and translation(填空并翻译)1.The number of the customers in this supermarket is about 200 and one of fifth of them are old people.这个超市的顾客数量大约是200人,其中五分之 the population of the country is fifty million and one-fifth of it _Chinesei s are?答案是ARE why?不是说one-fifth 作主语后面的动词跟OF后的词性吗 1.My friend lives on the fifth floor of the building .(对on the fifth提问）_______ _________floor______your friend_____.2.Give me one more.(同义句)Give______one to me.3.What delicious food it is!(同义句）_______delicious ______a________is! What is one one? 用of,girls,are,one,the,students,fifth造句 What is the population of China?There are more than 1.3 billion people in China.It is 1 one fifth of the world's population.How to control the population growth is a big problem.Some people think it .2 to control the population growth.But I don't qui It is the fifth of May.the fifth of May要划线.