A:grandmother
B:grandfather
在下列个数中,3,﹣2,0,16,227,3.1415,-273,﹣π2,93无理数的个数为( )
“每人前进一小步,社会前进一大步。”这句公益广告语告诉人们( )
如图A是一组立方块,请在括号中填出B、C图各是什么视图:
My study in junior high school is coming to an end. It's time ____us_______.