Grace went to the store ____ (buy) some meat and vegetables.
已知实数x,y满足y>1y≤2x-1x+y≤m,如果目标函数z=x﹣y的最小值为﹣2,则实数m的值为( )
如图,小明同学把两根等长的木条AC、BD的中点连在一起,做成一个测量某物品内槽宽的工具,此时CD的长等于内槽的宽AB,这种测量方法用到三角形全等的判定方法是( )
We can use wood ____(make) houses.