“a mass of ”clothes 还是“a large amount of ”clothes这两个都是修饰不可数的,有什么区别吗?（答案里选的是a mass of）

“a mass of ”clothes 还是“a large amount of ”clothes这两个都是修饰不可数的,有什么区别吗?（答案里选的是a mass of） the mass of 与 a mass of 有啥区别? mass的用法the mass of 和 a mass of 有什么区别？ a mass of =masses of吗? a mass of 的近义词和词性 a mass of是什么意思及用法 a mass The elements of a compound occur in a fixed mass ratio.请问fixed mass ratio a mass of 怎么用还有masses of It is nothing short of a mass exodus. 含义同上! a mass of ）a mass of可以修饰可数名词伐若可以,举3个例子给我 a mass of是什么意思We took _____ pictures of themA> many of B. masses ofc. a large amount of 为什么是用a mass of ? a mass of与a mount of与many of的区别 The club women gathered____clothes for people in the tsunami-hit countriesA a mass of B mass of C a large amount of D amount of 为什么选A The atomic mass of copper is 63.55 amu.There are onlytwo isotopes of copper,63Cu with a mass of 62.93 amu and65Cu with a mass of 64.93 amu.What is the percentageabundance of each of these two isotopes? a mass blind a mass of=a lot of,并且他们的用法都一样对吗? ___rock had fallen from the cliff and now blocked the road.A.Masses of B.A great mass of C.A much mass D.A mass of 选哪个,为什么其他的不行.要区别!= =谢谢了