Which type of e-commerce generated the largest revenue（）

A.A unique index

B.A composite index

C.A check constraint

D.A generated column

Which of the following is not the e-commerce business models？

A、Business-to-Business(B2B)

B、Electronic fund transfer

C、Business-to-Customer(B2C)

D、Customer-to-Customer(C2C)

Which of the following element belongs to E-commerce？ ()

A．business partners

B．production

C．development

D．corporate infrastructure.

Which of the following is NOT true about European e-commerce markets？

A．European e-commerce is mainly dominated by American giants.

B．Established European retailers were hesitant to leave the market to U.S. businesses.

C．American giants are quite successful in European markets.

D．Both auctions and retail markets are controlled by U. S. giants.

A、发动机类型 Engine type

B、发动机安装角 Engine setting angle

C、发动机推力 Engine thrust

D、发动机安装位置 Engine position

Which is the largest city in Scotland？

A．Cardiff.

B．Edinburgh.

C．Glasgow.

D．Manchester.

Which of the following is NOT true according to the passage？

A．E-commerce in China is developing very fast.

B．America's e-commerce giants are moving into China.

C．American e-commerce businesses have a hard time doing business on their own in China.

D．China's e-commerce businesses do not like to cooperate with foreign companies.

Which is the largest city in Scotland？

A．Cardiff.

B．Edinburgh.

C．Glasgow.

D．Manchester.