1.22.根号拿腊2/23.45度消源滑4.X^2+(Y-7)^2=95.46.X^2/4+Y^2/3=17.D8.B9.X^2/4-Y^2/12=110.1811.893/裂春247512.4X^2/9-Y^2/4=113.4814.315.B
第8题选B