"lots of " "a lot of "的区别?

lots of修饰可数和不可数名词 a lot 副词 如：thanks a lot a lot of只能修饰可数名词 a lot of=lots of 许多的 可以修饰可数名词和不可数名词 a lot是表示程度的一个词组 thanks a lot 多谢 know a lot about China...