a mass of 怎么用
问题描述：
a mass of 怎么用
还有masses of
答
a mass of =masses of 大量的.其后接可数名词和不可数名词均可.由 它构成的词组作主语时,谓语动词的数取决于 mass 或 masses.例如：①There are masses of ice in the river.河里有很多冰.② There is a mass of chi...