25×23×4
=25×4×23
=2300
English is a language shared by several diverse cultures, ________ uses it differently.
中国1978年底以后的经济改革获得了成功,而苏联赫鲁晓夫、勃列日涅夫和戈尔巴乔夫的经济改革最终都没有成功,其主要原因是( )