Since the early nineties, the trend in most businesses has been toward on-demand, always-available products and services that suit the customer’s ________ rather than the company’s.

A．benefit

B．availability

C．suitability

D．convenience

寻求两点之间最短、最快或景点最多的路径等可借助于（  ）

A．遥感系统

B．地理信息系统　　

C．全球定位系统

D．地球卫星系统