A:土地所有权变化
B:经济体制的变革
C:乡镇企业的出现
D:农民积极性提高
设CD是△ABC的边AB上的高,且满足CD2AC2+CD2BC2=1,则( )
选出恰当的应答语。
A.It's orange.
B.No,they aren't.They're mine.
C.It's on the chair.
D.They're my sister's.
E.Yes,it is.
( 1 )____( 2 )____( 3 )____( 4 )____( 5 )____