A:acted
B:committed
C:performed
D:completed
如图,⊙O的半径是1,A、B、C是圆周上的三点,∠BAC=36°,则弦BC所对的弧长是____ .
He jumped very well and ____ (come) first.
下列有关艾滋病的叙述错误的是( )
①你画的平行四边形有____条边,有____个角.
②加上一条边,有____条边,____个角.