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单选题
Energy loses （）friction occurs in every engine.
A
because
B
thanks to
C
dues to
D
owing to
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Green Energy1.Green energy is energy that is produced in a manner that has, less of a negative impact to the environment than energy sources like fossil fuels,which are often produced with harmful side effects."Greener" types of energy that often come to mind are solar,wind,geothermal and hydro energy.There are several more,even including nuclear energy,that is sometimes considered a green energy source because of its lower waste output relative to energy sources such as coal or oil.2.The goal of green energy is generally to create power with as little pollution as possible produced as a by-product. Every form of energy collection will result in some pollution,but those that are green are known to cause less than those that are not. Most people who advocate greener sources of energy claim that the result of worldwide use of green energy will result in the ability to preserve the planet for a longer time.Greenhouse gases,a by-product of traditional sources of energy such as fossil fuels are thought to be causing global warming,or the process of the Earth heating up at an accelerated pace.3.It is not completely necessary for green energy sources to come from places like solar or wind fields,which are examples of green"power plants".A green energy source can be a building that is designed in a way that it keeps itself cool in the daytime and heated in the night through its architectural design rather than having an air-conditioning or a heating system. The conservation of energy through architectural（建筑学的）design becomes, itself, a green energy source. Similarly, many sources of green energy can come directly from the area in which the energy is needed rather than from an outside source.4.One of the goals of green energy technology is to take existing fossil fuel energy technology and clean it up so it is produced more cleanly. One such case is that of clean coal technology,where scientists are trying to find ways to extract energy from coal and other fossil fuels without all of the harmful side effects.The success of such these types of green energy depend upon the ability to extract harmful by-products from fossil fuels while not only being energy efficient,but by being cost efficient as well.Greenhouse gases are thought to be causing______.A:global warmingB:carbon emissionC:lower waste outputD:a green energy sourceE:fossil fuels F: clean fuels
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Green Energy1.Green energy is energy that is produced in a manner that has, less of a negative impact to the environment than energy sources like fossil fuels,which are often produced with harmful side effects."Greener" types of energy that often come to mind are solar,wind,geothermal and hydro energy.There are several more,even including nuclear energy,that is sometimes considered a green energy source because of its lower waste output relative to energy sources such as coal or oil.2.The goal of green energy is generally to create power with as little pollution as possible produced as a by-product. Every form of energy collection will result in some pollution,but those that are green are known to cause less than those that are not. Most people who advocate greener sources of energy claim that the result of worldwide use of green energy will result in the ability to preserve the planet for a longer time.Greenhouse gases,a by-product of traditional sources of energy such as fossil fuels are thought to be causing global warming,or the process of the Earth heating up at an accelerated pace.3.It is not completely necessary for green energy sources to come from places like solar or wind fields,which are examples of green"power plants".A green energy source can be a building that is designed in a way that it keeps itself cool in the daytime and heated in the night through its architectural design rather than having an air-conditioning or a heating system. The conservation of energy through architectural（建筑学的）design becomes, itself, a green energy source. Similarly, many sources of green energy can come directly from the area in which the energy is needed rather than from an outside source.4.One of the goals of green energy technology is to take existing fossil fuel energy technology and clean it up so it is produced more cleanly. One such case is that of clean coal technology,where scientists are trying to find ways to extract energy from coal and other fossil fuels without all of the harmful side effects.The success of such these types of green energy depend upon the ability to extract harmful by-products from fossil fuels while not only being energy efficient,but by being cost efficient as well.Paragraph 3______A:Why Do We Develop Green Energy?B:What Is the Goal of Green Energy?C:What Is the Weakness of Green Energy?D:What Is a Green Energy?E:How Much Does the Green Energy Cost Every Year?F: How Many Kinds of Green Energy We Can Take Use of?
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What are two instances when a WX device route carves? （）(Choose two.)A、It occurs every 29 hours.B、Packet interception mode is enabled.C、The host is unreachable on the local subnet.D、The subnet is unreachable using the advertised router.
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In which three cases does a checkpoint occur？ （）A、Every three minutes.B、When a log switch occurs.C、When forces by an administrator.D、When a tablespace is taken offline normal.E、When the redo buffer is one-third full.
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TestKing.com has two SQL Server 2005 computers named SQL1 and SQL2. Transaction log shipping occurs from SQL1 to SQL2 by using default SQL Server Agent schedule settings. You need to reconfigure transaction log shipping to provide minimum latency on SQL2. What should you do？（）A、On SQL1， reschedule the transaction log backup job so that it occurs every minute. On SQL2， maintain default schedule settings for both the log shipping copy and the restore jobs.B、On SQL1，change the schedule type for the transaction log backup to Start automatically when SQL server Agent starts. On SQL2， change the schedule types for both the log shipping copy and the restore jobs to Start automatically when SQL Server gent starts.C、On SQL1， maintain default schedule settings for the transaction log backup job. On SQL2， change the schedule types for both the log shipping copy and the restore jobs to Start automatically when SQL server Agent starts.D、On SQL1， reschedule the transaction log backup job so that it occurs every minute. On SQL2， reschedule both the log shipping copy and the restore jobs so that they occur every minute.
考题
单选题In a single acting, four-stroke/cycle diesel engine, the power impulse in an individual cylinder occurs （）A
once every crankshaft revolutionB
once every two crankshaft revolutionsC
once every piston strokeD
twice every piston stroke
考题
单选题A 10-gallon bucket loses 2 gallons of water every 10 minutes. How many minutes will it take a fu U bucket to empty completely?A
20B
22C
40D
50E
100
考题
单选题A revised print of a chart is made （）.A
after every major hydrographic survey of the area covered by the chartB
when there are numerous corrections to be made or the corrections are extensiveC
when a low-stock situation occurs and minor corrections are madeD
every two years to update the magnetic variation information
考题
问答题A set dominoes(多米诺) consists of rectangular (矩形的) tiles each carrying two numbers from 0 to 6 which represented by patterns of spots. Every possible pairing of numbers occurs just once including each number with itself. How many dominoes are there in a set?
考题
单选题（）, the motion would continue indefinitely once it had started.A
Were there loss of energy by frictionB
Since there be loss of energy by frictionC
Were there no loss of energy by frictionD
Should be no loss of energy by friction
考题
问答题What occurs once in every month, twice in every moment, but not once in a thousand years?
考题
单选题Any friction fit, tightness or adhesion of the part of any load being lifted should be broken by wedge or tapping and not by increasing the load on the applianceAccording to this sentence, （）A
the lifting appliance can always lift the freight within its rated loadB
attention should be paid in order not to break the wedge when lifting cargoC
sometimes the lifting work needs other assistance other than the lifting applianceD
lifting work should be done with every part fit, tightness or adhesion
考题
单选题A centrifugal pump produces flow with a resulting discharge head by energy conversionIt is typical for the energy conversion to follow the order of （）.A
mechanical energy to kinetic energy to potential energyB
mechanical energy to potential energy to kinetic energyC
potential energy to mechanical energy to kinetic energyD
kinetic energy to mechanical energy to potential energy
考题
多选题What are two instances when a WX device route carves? （）(Choose two.)AIt occurs every 29 hours.BPacket interception mode is enabled.CThe host is unreachable on the local subnet.DThe subnet is unreachable using the advertised router.
考题
单选题In a single acting, two-stroke/cycle, diesel generator engine, the power impulse in an individual cylinder occurs （）A
once every crankshaft revolutionB
once every two crankshaft revolutionsC
once every piston strokeD
twice every piston stoke
考题
单选题Simplex tailshaft seal equipment’s working condition is terribleThe main cause is （）A
the shafting’s vertical vibrationB
violent friction and sea water corrosiveC
friction and high temperatureD
violent friction and high temperature
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单选题The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.A
specific gravityB
viscosityC
S E numberD
hydrolytic stability
考题
单选题Energy losses due to （） occur in every machine.A
speedB
frictionC
impactD
atmosphere
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