UNIX文件加密工具有以下哪些()。
A.pgpe(加密)
B.pgps(签名)
C.pgpv(确认/解密)
D.pgpk(管理密钥)
参考答案:A, B, C, D
密封圈无破损,刀削后应整齐平滑,不得出现锯齿状,锯齿直径差大于2mm(含2mm)为()、小于2mm为不完好。
A、失爆
B、不完好
C、完好
D、不失爆
All entries in the official logbook must be signed by the master and().
A.the union representative
B.the person aboat whom the entry concerns
C.no one else
D.one other crew member