— Mrs. White. She has lived in China for years. _____ Chinese is very good.
A:you; Her
B:your; Hers
C:you; Him
D:your; She
小蚂蚁总是齐心协力把食物搬回家,这是一种反映了生物之间的( )关系。
如图,矩形OABC的边OA长为2 ,边AB长为1,OA在数轴上,以原点O为圆心,对角线OB的长为半径画弧,交正半轴于一点,则这个点表示的实数是
( )