— John, I'm very tired. Let's stop to have a ______.
— OK. Then let's sit under the tree and drink some water.
A:try
B:meal
C:rest
两个数的比值是1.2,如果比的前项扩大2倍,后项缩小两倍,比值是( )
一个有理数的平方是正数,那么这个数的立方是( )