一 Who helped you clean the classroom yesterday?
— ________. I did it all by myself.
A:Someone
B:Anyone
C:Nobody
D:Everybody
口算
500-230= 305÷5= 0+6= 20×30=
38+125= 27×40= 360÷9= 12×0=
50×80= 140×52 45-25= 27+47=
用图象法解某二元一次方程组时,在同一直角坐标系中作出相应的两个一次函数的图象(如图所示),则所解的二元一次方程组是( )
读一读,选词填空。
Music Science PE Art
下列词语中没有错别字的一项是( )