【单选题】If Counyty A forms a customs union with Country B, then____________
A.
goods exported from Country A to Country B continues to face tariff by Country
B.
all new trade between Country A and Country B because of the union is known as " trade creation."
C.
all trading partners of countries A and B must necessarily benefit from the customs union.
D.
Countries A and B may especially benefit from the union if substantial economies of scale exist in some of the A and B industries.
【简答题】体外培养动物细胞三类型:( )、( )、( )
【简答题】肺泡上皮细胞中能分泌表面活性物质的细胞是 。
【简答题】PLC 程序既有生产厂家的 _______ 程序,又有用户自己开发的 _________ 程序。
【多选题】下列哪些是维系 DNA 双螺旋的主要因素
【判断题】If a customs union included all of the countries in the world, there could exist only trade creation, not trade diversion.
【多选题】下列哪些是维系 DNA 双螺旋的主要因素