If some surveys refer to statutory survey and ship classification survey but occur temporarily, we call them （）<br>A:periodic survey<br>B:statutory survey<br>C:additional survey<br>D:annual survey

If some surveys refer to statutory survey and ship classification survey but occur temporarily, we call them （）
A:periodic survey
B:statutory survey
C:additional survey
D:annual survey

出自：海船船员证

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