A:x24+y33=1
B:x28+y26=1
C:x22+y2=1
D:x24+y2=1
—How long ago _________ you _________ the English Club?—I _________ it since two years ago.
如图,两个高度相等的圆柱形水杯,甲杯装满液体,乙杯是空杯.若把甲杯中的液体全部倒入乙杯,则乙杯中的液面与图中点P的距离是( )