One of the following is not a integral part of ship security plan.______.A.Internal and external communicationB.Restricted areasC.Access to shipD.Non of the above

One of the following is not a integral part of ship security plan.______.

A.Internal and external communication

B.Restricted areas

C.Access to ship

D.Non of the above


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PID是比例、积分、微分的缩写 Proportional-Integral-Differential。

Integral(f)表示积分