Oil is an important（）material which can be processed into many different products, including plastics.

A.uncovered

B.raw

C.fresh

D.crude

标准C船站不能完成下述任务.（）

A、能提供气象和安全信息

B、能进行遇险报警

C、能进行电传通信

D、能进行电话通信和传真通信