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

a mass of =masses of吗? a mass of 怎么用还有masses of masses of 是不是与a mass of 意思一样 啊,有什么区别吗两个是不是都可以修饰可数和不可数啊,masses of修饰不可数名词时是不是要用单数,那a mass of 呢 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 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 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 ? ___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 masses of 和 a mass of 的谓语动词分别是什么（看问题补充）假设谓语动词为A 词组所修饰的名词为B对于masses of 来说 若B为复数可数名词 则A是are 若B为不可数名词 则A是i mass的用法the mass of 和 a mass of 有什么区别？ 适当形式填空.A mass of water_____(be)flowing out of the room.Masses of ice_____(be)floating down the river.A mass of people_____(have)already gathered in the theatre.最好说下理由. a mass of 的近义词和词性 实验目标和原理是什么?Atwood’s MachineA classic experiment in physics is the Atwood’s machine:Two masses on either side of a pulley connected by a light string.When released,the heavier mass will accelerate downward while the lighter one 英语翻译the masses of three student are in the ratio 4:5:8,if their combined mass is 204kg,find the mass of the heaviest student, the mass of 与 a mass of 有啥区别? Two masses,M and m,are hung over a massless,frictionless pulley as shown below if M>m,what is the downward acceleration of mass M.用字母表示 masses of 与a large number of区别 a plenty of 和plenty of.a great deal of masses of a large amount of in large/small amounts 后面都接什么词性 masses是mass的复数吗,能用masses’来作为所有格吗?