——How old is your daughter?—— ______ . We had a special party for her _____ birthday last week.
A:Ninth; ninth
B:Nine ; nineth
C:Ninth; nine
D:Nine; ninth
在下面的横线上填上适当的数.
____ ÷9=79
6÷ ____= 621
如图,在四边形ABDC中,△EDC是由△ABC绕顶点C旋转40°所得,顶点A恰好转到AB上一点E的位置,则∠1+∠2= ( )