战争是政治的延续，这一句名言出自（）。

A.希腊波斯战争史

B.战争论

C.论持久战

D.孙子兵法

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