a mass of 的近义词和词性

a mass of 的近义词和词性 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. the mass of 与 a mass of 有啥区别? a mass of =masses of吗? 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. mass of 和 amount of 和 many of他们的区别和用法 a mass of与a mount of与many of的区别 a mass of是什么意思及用法 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 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 a lot of的词性是什么 a mixture of Caco3 and Baco3 is 42.8% Co3 by mass. find the mass percent of baCo3 in the mixture什么是is 42.8% Co3 by mass? 是说混合物有42.8%的重量是Co3么? 这些都可以修饰可数名词和不可数名词吗?a supply of a quantity of a mass of a variety of a dozen of The elements of a compound occur in a fixed mass ratio.请问fixed mass ratio