Edmund Jones, an economist, recommends that the federal government consider reducing its budget deficit during a recession by raising income taxes with no other fiscal policy changes. Jones’ income tax increase recommendation will most likely have the following effects on the supply of labor and on potential GDPSupply of labor Potential GDP（）①A. Decrease Decrease ②B. Decrease Increase ③C. Increase Decrease

A. ①

B. ②

C. ③

下列关于赠与合同的表述正确的是（）

A.赠与合同是有名合同

B.赠与合同是单务合同

C.赠与合同是诺成合同

D.赠与合同是不要式合同

E.赠与合同不得撤销