心理发展的不平衡性是指( )

A．人生全程心理发展并不是以相同的速率前进的

B．各个心理发展水平不同

C．各个体心理发展方向不同

D．各个体心理发展阶段不同

Freight forwarders should study the provisions of the letter of credit and all governments regulation applicable to the shipment of goods in( )．

A．the exporter's country

B．the importer's country

C．the countries involved

D．European countries