网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
In more recent years, （） heat exchangers have frequently been employed for jacket water and oil cooling.
A
shell and tube type
B
plate type
C
coil type
D
conical disc type
参考答案
参考解析
解析：
暂无解析
更多 “单选题In more recent years, （） heat exchangers have frequently been employed for jacket water and oil cooling.A shell and tube typeB plate typeC coil typeD conical disc type” 相关考题
考题
CSometimes, the simplest ideas are the best. For example, to absorb heat from the sun to heat water, you need large, flat, black surfaces. One way to do that is to build those surfaces specially, on the roofs of buildings. But why go to all that trouble when cities are full of black surfaces already, in the form. of asphalt (柏油) roads?Ten years ago, this thought came into the mind of Arian de Bondt, a Dutch engineer. He finally persuaded his boss to follow it up. The result is that their building is now heated in winter and cooled in summer by a system that relies on the surface of the road outside.The heat-collector is a system of connected water pipes. Most of them run from one side of the street to the other, just under the asphalt road. Some, however, dive deep into the ground.When the street surface gets hot in summer, water pumped through the pipes picks up this heat and takes it underground through one of the diving pipes. At a depth of 100 metres lies a natural aquifer (蓄水层) into which several heat exchangers (交换器) have been built. The hot water from the street runs through these exchangers, warming the ground-water, before returning to the surface through another pipe. The aquifer is thus used as a heat store.In winter, the working system is changed slightly. Water is pumped through the heat exchangers to pick up the heat stored during summer. This water goes into the building and is used to warm the place up. After performing that task, it is pumped under the asphalt and its remaining heat keeps the road free of snow and ice.64. Which of the following is true according to the first two paragraphs?A. Arian de Bondt got his idea from his boss.B. Large, flat, black surfaces need to be built in cities.C. The Dutch engineer's system has been widely used.D. Heat can also be collected from asphalt roads.
考题
From the last paragraph we can learn that __A. some pipes have to be re-arranged in winterB. the system can do more than warming up the buildingC. the exchangers will pick up heat from the street surfaceD. less heat may be collected in winter than in summer
考题
in more recent years, partly through canadian diplomatic efforts, things like _________ and______________ have been put on the international agenda.A. arms control, human rightsB. economic crisis, inequalityC. organized crime, drug traffickingD. women s issues, the environment
考题
Two events have highlighted the tensions in recent years.A:extended
B:emphasized
C:distorted
D:illustrated
考题
Two events have highlighted the tensions in recent years.A:extended
B:emphasized
C:distorted
D:illustrated
考题
In recent years, much more emphasis has been put ___________ developing the students′ productive skills.A.onto
B.over
C.in
D.on
考题
All kinds of techniques and medicines ______ to extend human beings’ live in recent years.
A.have been developed
B.are being developed
C.were developed
D.develop
考题
Some women in recent years have brought successful court challenges to gender discrimination in job ads，but the______the companies were ordered to pay was low。A.regulation
B.occupation
C.permission
D.compensation
考题
Attitudes to mental illness have shifted in recent years.A:displayed B:shown C:changed D:demonstrated
考题
In recent years much more emphasis hasbeen put ______ developing the students′ productive skills.A.onto
B.over
C.in
D.on
考题
They have learned about（）in recent years.Aseveral hundreds English wordsBhundreds of English wordsChundred of English wordsDseveral hundred English words
考题
How many years of experience do you have using any version of Windows Server? （）A、I have not done this yet.B、Less than 6 monthsC、More than 6 months but less than 1 yearD、1-2 yearsE、2-3 yearsF、More than 3 years
考题
How many years of experience do you have with deploying and maintaining a virtualization infrastructure using any desktop or server virtualization technologies?（）A、I have not done this yet.B、Less than 6 monthsC、More than 6 months but less than 1 yearD、1 - 2 yearsE、2 - 3 yearsF、More than 3 years
考题
How many years of experience do you have with deploying and maintaining a virtualization infrastructure using any desktop or server virtualization technologies?（）A、I have not done this yet.B、Less than 6 monthsC、More than 6 months but less than 1 yearD、1-2 yearsE、2-3 yearsF、More than 3 years
考题
单选题They have learned about（）in recent years.A
several hundreds English wordsB
hundreds of English wordsC
hundred of English wordsD
several hundred English words
考题
单选题According to a recent research， the old are more than twice as likely to have a positive attitude to life___ the young.A
asB
thanC
whileD
until
考题
单选题In recent years, tourist companies have succeeded in selling us the idea that the farther we go, our holiday will be the better.A
In recent yearsB
have succeededC
the fartherD
the better
考题
单选题The interior of some diesel engine saltwater heat exchangers are protected from corrosion by the use of（）A
aluminum platesB
lead cathodesC
copper baffle platesD
sacrificial zincs
考题
单选题Once more I have to leave Beijing, _____ I have been living for eight years.A
ThatB
whereC
whichD
as
考题
单选题To avoid impingement attack, care must be taken with the water （） through the tubes of the heat exchangers.A
temperatureB
velocityC
densityD
viscosity
考题
单选题Which of the general advantages listed does the electrical pyrometer have over the mechanical pyrometer?（）A
When heated, it will move proportional to the amount the metal has lengthened or expandedB
The pointer associated with the pyrometer scale can be made to also measure engine RPMC
It can be utilized in exhaust manifolds and heat exchangers interchangeablyD
It can indicate temperature at a distant point from the source heat
考题
单选题In more recent years，（）has been used by civilians in many new ways to determine positions，such as in automobile and boat navigation，hiking，emergency rescue，and precision agriculture and mining.A
GPSB
GMDSSC
AISD
Navtex
考题
单选题Although recent years have seen（）reductions in noxious pollutants from individual motor vehicles, the number of such vehicles has been steadily increasing.A
substantialB
substanceC
submitD
subjective
考题
单选题Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to（）.A
reduce electrolytic action on heat exchanger metalsB
keep heat transfer surfaces shiny and cleanC
prevent rapid accumulation of marine growthD
provide a protective coating on heat exchanger surfaces
热门标签
最新试卷
