题目

下列改革中，直接起到了促进民族融合作用的是 A．管仲改革                                                  B．吴起变法 C．商鞅变法                                                  D．北魏孝文帝改革 答案：DI don't know ________. A．what they are talking aboutB．What they are talking C．where they are talking aboutD．What are they talking about