mass的具体用法a mass of 和masses of修饰名词作主语时,其后的谓语动词单复数的用法如何?请详细说明.

mass的用法the mass of 和 a mass of 有什么区别？ mass的具体用法a mass of 和masses of修饰名词作主语时,其后的谓语动词单复数的用法如何?请详细说明. a mass of 的近义词和词性 a mass of是什么意思及用法 mass of 和 amount of 和 many of他们的区别和用法 a mass of=a lot of,并且他们的用法都一样对吗? the mass of 与 a mass of 有啥区别? mass a mass a mass of 和 masses of的用法 请简洁的表述并举例 其后面的谓语动词是单数还是复数 mass-market和mass market的区别是什么如题 a mass of =masses of吗? Mass和Molecular Weight具体区别? 在mass media相关的讨论中,public,mass,和popular 的概念的各自侧重点是什么?Please describe the difference emphasis of the concept of the public,mass,and popular,in relation to the discussion of the mass media. a great deal/ number/ amout of,a mass of,plenty of的用法问题,这几组词后面接可数不可数名词的情况 The elements of a compound occur in a fixed mass ratio.请问fixed mass ratio ___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 a mass of与a mount of与many of的区别