Cleaning is a constant job （）board a ship.A、atB、onC、forD、with
Cleaning is a constant job （）board a ship.
- A、at
- B、on
- C、for
- D、with
相关考题：
1 like cleaning the bike because I can be outside．（对划线部分提问）_________ _________ you like cleaning the bike?
They()since last night. They are about to finish the work.A. are cleaning the systemB. have been cleaning the systemC. had cleaned the system
Which of the following tasks is not performed by the job coordinator?() A. Update job log when a job completesB. Spawn and remove job slavesC. Write/read job info to/from memory cacheD. Query job tableE. Pass job information to job slaves
设有一组作业，它们的作业提交时刻及估计运行时间如下所示： 作业号 提交时刻 估计运行时间(分钟) Job1 8：30 70 Job2 9：10 30 Job3 9：30 15 Job4 9：50 5 在单道批处理方式下，采用短作业优先调度算法，作业的执行顺序为A．Job1，Job4，Job3，Job2B．Job1，Job3，Job4，Job2C．Job4，Job3，Job2，Job1D．Job4，Job1，Job2，Job3
______is a precaution which contributes to avoiding trouble under normal operating conditions.A.Constant inspectionB.Keeping constant loadC.Remaining constant temperatureD.Varying speed
Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is ______.A.entirely constant pressureB.entirely constant temperatureC.a combination of constant volume and constant pressureD.a combination of constant temperature and constant pressure
After the initial cleaning of flue gas in an inert gas system the gas is passed through what device for final cleaning ________．A.ScrubberB.DemisterC.Deck water sealD.Final filter
清洁，涂漆，修理工作称为船舶保养工作。（）A、Cleaning, painting and repairing work are known as sailor’s work.B、Cleaning, painting and repairing work are known as maintenance work.C、Painting, repairing and cleaning work are known as maintenance work.D、Cleaning, painting and repairing work are known as daily work.
在船上，打扫卫生是经常性工作。（）A、Cleaning is a frequent job at sea.B、Painting is a frequent job on board a ship.C、Cleaning is a frequent job on board a ship.D、Repairing is a frequent job on board a ship.
Which of the following tasks is not performed by the job coordinator？（）A、 Update job log when a job completesB、 Spawn and remove job slavesC、 Write/read job info to/from memory cacheD、 Query job tableE、 Pass job information to job slaves
单选题After the initial cleaning of fule gas in an inert gas system is passed through what devoce for final cleaning?（）.AScrubberBDemisterCDeck water sealDFinal filter
单选题After the initial cleaning of flue gas in an inert gas system the gas is passed through what device for final cleaning?（）.AScrubberBDemisterCDeck water sealDFinal filter
单选题Which of the following tasks is not performed by the job coordinator？（）A Update job log when a job completesB Spawn and remove job slavesC Write/read job info to/from memory cacheD Query job tableE Pass job information to job slaves
单选题It is the chief mate’s job（）the tank cleaning operation．Ato planBplanningCfor planningDin planning
单选题Increasing the load on an engine equipped with a constant speed mechanical governor, will cause the engine speed to initially （）.AincreaseBdecreaseCfluctuateDremain constant
单选题Which of the following tasks is not performed by the job coordinator?（）AUpdate job log when a job completesBSpawn and remove job slavesCWrite/read job info to/from memory cacheDQuery job tableEPass job information to job slaves
单选题Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is（）Aa combination of constant volume and constant pressureBa combination of constant temperature and constant pressureCentirely constant pressureDentirely constant volume
单选题Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is（）Aentirely constant pressureBentirely constant temperatureCa combination of constant volume and constant pressureDa combination of constant temperature and constant pressure
多选题You notice that the elapsed time for an important database scheduler Job is unacceptably long. The job belongs to a scheduler job class and window. Which two actions would reduce the job's elapsed time?（）AIncreasing the priority of the job class to which the job belongsBIncreasing the job's relative priority within the Job class to which it belongsCIncreasing the resource allocation for the consumer group mapped to the scheduler job's job class within the plan mapped to the scheduler windowDMoving the job to an existing higher priority scheduler window with the same schedule and durationEIncreasing the value of the JOB_QUEUE_PROCESSES parameterFIncreasing the priority of the scheduler window to which the job belongs
单选题列出EMP表中，从事每个工种（JOB）的员工人数（）Aselect job from emp;Bselect job,count(*) from emp;Cselect distinct job,count(*) from emp;Dselect job,count(*) from emp group by job;Eselect job,sum(empno) from emp group by job;