题目内容

The making of policies aboutChinacross-border e-commerce falls into three stages: Early Stage (2004-2007); Development Stage (2008-2012); High-tide Stage (since2013).

A. 对
B. 错

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Some of traditional trade has shifted to cross-border e-commerce, and goods are delivered by express or mail.

A. 对
B. 错

In cross-border e-commerce, goods delivered by express and mail do not face any troubles in customs clearance, settlement of exchange and tax reimbursement.

A. 对
B. 错

From the perspective of transaction modes, B2B was absolutely the dominant mode.

A. 对
B. 错

孔板流量计与测速管都是属于定节流面积的流量计,利用变动的( )来反映流量的变化。

A. 压强差
B. 动能差
C. 速度差
D. 摩擦阻力

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