30% 是thirty percent 还是thirty percents?

30% 是thirty percent 还是thirty percents? 究竟是thirty percent of them is water还是thirty percent of them are water 为什么另外 如何判断类似句子中of后面的be是单数还是复数 thirty percent of them cited the mobile phone as the most disliked yet essential invention这句话as是做什么用的? 英语翻译Deposit advance payment of 30% (thirty percent) from Proforma Invoice’s amount issued by the Seller within 5 (Five) working days counting from the date of its receipt;- Balance payment of 70% (seventy percent) from Proforma Invoice’s 90 percent of 30 Our house is thirty percent bigger than theirs in size.请翻译 Thirty percent of our classmates __________ from country.A.are B.is C.was D./ thirty 百分之50是fifty percent还是fifty of percent percent是一个词还是两个词 percent?per cent? short of 40 percent 意思是说不足40 percent还是说差40 percent? thirty的ir音标是 thirty的中文意思是 是 at thirty six 还是in thirty six 91:they were thirty-three percent less likely to get HPV.这句话结构怎样分呢.91:they were thirty-three percent less likely to get HPV.这句话结构怎样分呢. Nearly 30 percent of the answers _____(be) wrong.Nearly 30 percent of the answers _____ (be) wrong.我的答案是：are正确答案是：is fifteen to twenty percent是啥 The total is thirty yuan Your total is thirty yuan 有没有更地道的 我想说总共是30元