A:过滤
B:蒸馏
C:分液
D:萃取
①“一国两制”促进了澳门的繁荣稳定
②澳门回归促进了大陆与澳门的经济往来
③澳门回归是民族区域自治的成功实践
④澳门回归为解决台湾问题提供了范例
设M是△ABC的边AC的中点,过M作直线交AB于E,过B作直线平行于ME交AC于F.求证:△AEF的面积等于△ABC的面积的一半.
— I was listening carefully but I could not ________ everything he said. He spoke too many local idioms.