是a amount of还是an amount of

是a amount of还是an amount of amount of还是amounts of还是an amount of an amount of 和 a large number of 的区别是什么?Beijing attracts （ ）visitors from China and other countries.括号里填的是an amount of还是a large number of a amount of和the amount of的谓语动词是单数还是复数 英语：大量的是a large amount of还是large amount of? an amount of,a number of,the amount of,the number of的意思与区别? an amount of后加名词单数还是复数the amount of后加名词单数还是复数,a great deal of后加名词单数还是复数,当an amount of,the amount of,a great deal of作主语时,谓语动词用单数还是复数．急用 an amount of 后接可数还是不可数 a number of和an amount of的区别? the number of students 后 应该＋are还是is the number of ...的主语是复数还是单数啊?那么 a number of 和 an amount of 还有 amounts of an amount of+an amount of后加什么?（可数不可数,单数还是复数）a quantity of的用法又是什么?（可数不可数,单数还是复数）quantities of后面加什么?只要这三个. the number of 和a large amount of是修饰可数还是修饰不可数名词 a large amount of谓语动词是单数形式还是复数形式? amount of还是amounts of an amount of与amount of 的用法与区别? a large amount of加可数名词还是不可数名词 a large amount of 后接可数还是不可数? an amount of,a number of和a quantity of之间的用法有何不同