There will not be enough space to the earth in the future.
A:live on
B:live in
C:live on in
D:live in on
现有四个单项式:﹣2x2yz,12xyz2,﹣3x2yz,13xyz2,规定只能用乘法或除法运算,使由4个单项式组成的算式的计算结果是一个常数,请写出一个符合要求的算式.
下边这幅《辜负了关爱》漫画的寓意是( )