A:can, can
B:can't , can't
C:can, can't
6×4=____
口诀:____
徐天麟在《西汉会要》中说:“汉祖龙兴,取周秦之制而兼用之,其亦有意于矫前世之弊矣。”这里“矫前世之弊”主要是指( )