A：①②
B：①③
C：①④
D：③④
—It is the U. K.
①秦朝在全国废除分封制，推行郡县制
②汉初吸取秦亡教训，推行郡国并行制
③议政王大臣会议决定清初“军国政事”
④清初，雍正帝命令地方大员密折奏事
Tom worked very hard at all his lessons. , he became the top student in his class.
对光完成的标志是要看到明亮的圆形视野。
