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【单项选择题】

Either you or the headmaster()the prizes to those gifted students at the meeting

A、A.is handing out

B、B.are to hand out 

C、C.are handing out

D、D.is to hand out

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第2题

A、The shutdown proceeds immediately. The shutdown proceeds as soon as all transactions in the PDBs are either committed or rolledhack.  B、The shutdown proceeds as soon as all transactions in the CDB are either committed or rolled back.  C、The shutdown proceeds as soon as all transactions in both the CDB and PDBs are either committed or rolled back.  D、The statement results in an error because there are open PDBs.  

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第3题

A、He/she must have an STCW certificate endorsed as“Valid for Service on Vessels Operating in the GMDSS System”  B、He/she must present either an FCC-issued license or a Coast Guard-issued license  C、You must consult the“List of Qualifications”on the reverse of his/her FCC-issued license  D、His/her Merchant Mariners Document must have an added endorsement as “Radio Electronics Officer”  

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第8题

A、All switch and bridge ports are in the forwarding state.  B、All switch and bridge ports are assigned as either root or designated ports.  C、All switch and bridge ports are in either the forwarding or blocking state.  D、All switch and bridge ports are either blocking or looping.  

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第9题

A、that he has his engines in reverse  B、that he is shortening the distance between vessels  C、to shorten the distance between vessels  D、that his vessel is healthy  

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