Class C EPIRBs are（）. A.manually activated

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问题单项选择题

Class C EPIRBs are（）.

A.manually activated and operate on maritime (VHF) channels

B.automatically activated and operate on maritime (VHF) channels

C.manually operated and detected by satellite

D.automatically operated and detected by satellite

答案

参考答案：B

单项选择题

When should lessons learned be organized ？（）

A．During the project life cycle and at the end

B．At the end of the project during closing

C．After the end of the project at a project post-mortem meeting

D．Lessons learned can be organized when there is time available

多项选择题

中小学校讯通A套餐，主要提供哪些服务内容？（）

A.平安短信

B.成绩查询

C.亲情电话

D.家校互动