In the long run, one should save money for ____.(紧急情况)
由曲线y=x,直线y=x-2及y轴所围成的封闭图形的面积为( )
— What do you think the pants?
— The pants too short.
如图,在平面直角坐标系中,A(1,2),B(3,1),C(﹣2,﹣1).