Which ones are the two type of ciphers？（）A、 Blocking cipher andnon-blocking cipherB、 CBC cipher and EBC cipherC、 Block cipher and Stream cipherD、 Blocker cipher and Streamer cipherE、 3DES cipher and AES cipher
Which ones are the two type of ciphers？（）
- A、 Blocking cipher andnon-blocking cipher
- B、 CBC cipher and EBC cipher
- C、 Block cipher and Stream cipher
- D、 Blocker cipher and Streamer cipher
- E、 3DES cipher and AES cipher
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单选题During fueling，all doors，hatches，and ports（）.Ato windward should be opened and the ones to leeward should be closedBto leeward should be opened and the ones to windward should be closedCshould be openedDshould be closed
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