What statement is right about government program?The government program involves buying groups of loans and securities or financial investments tied to loans.如图，直线y=2x与抛物线y=3﹣x2所围成的阴影部分的面积是（ ）
Around the turn of the century, B2C businesses rushed ahead of the e-commerce wave. There has been a similar rush to improve mobile app development in the last ten years. One thing driving this trend is the idea that the best way to do well in B2C is to keep up with changing customer...