题目

             the population of China is the largest in the world. A. It is well known that                                         B. As is well known   C. Which is well known                                         D. That is well known 答案：A“自封建变为郡县，有天下者，汉、隋、唐、宋为盛，然幅员之广，咸不逮元”。元朝疆域空前辽阔，为对全国进行有效的统治，元朝主要实行A.分封制       B.宗法制     C.内阁制      D.行省制