____sit down?
--- is it from here to Australia?
--- I'm not sure, but I know it's on the other side of the earth.
以下关于欧洲西部的说法,正确的是( )
“天地之间有杆秤,那秤砣是老百姓”这句歌词表明,衡量政府有无权威的标志是( )
如图,四边形ABCD为矩形,E是BC延长线上一点,AE交CD于点G,F是AE上一点,并且AC=CF=EF,∠AEB=15°.
(1)求∠ACF的度数;
(2)证明:矩形ABCD为正方形.