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【单选题】

Where shall the key to C0<sub>2</sub> room be kept?()

A、In master's cabin

B、In third office's cabin

C、In a break-glass-type enclosure conspicuously located adjacent to the room

D、In a locked locker conspicuously located adjacent to the room

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A、the light-house  B、the anchorage  C、the pilot station  D、the light-buoy  

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第5题

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第7题

A、In the DH key exchange process, the session key is never passed across the network.  B、In the DH key exchange process, the public and private keys are mathematically related using the DH algorithm.  C、In the DH key exchange process, the session key is passed across the network to the peer for confirmation.  D、In the DH key exchange process, the public and private keys are not mathematically related, ensuring higher security  

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第8题

A、three shapes,the highest and lowest shall be red balls,and the middle shall be a white diamond  B、two black balls  C、three shapes; the highest and lowest shall be black balls,and the middle shall be a red diamond  D、three shapes; the highest and lowest shall be black balls and the middle shall be a black diamond  

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第9题

A、DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);  B、DELETE * FROM employees WHERE employee_id = (SELECT employee_id FROM new_ employees);  C、DELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = 'carrey');  D、DELETE * FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = 'carrey');  

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