单选题What is the main advantage of a rain barrel system?A It benefits the Earth by recycling water.B Its efficiency increases in areas with little rainfall.C It utilizes technology that is centuries old.D It results in lower utility payments.
题目
It benefits the Earth by recycling water.
Its efficiency increases in areas with little rainfall.
It utilizes technology that is centuries old.
It results in lower utility payments.
相似考题
更多“单选题What is the main advantage of a rain barrel system?A It benefits the Earth by recycling water.B Its efficiency increases in areas with little rainfall.C It utilizes technology that is centuries old.D It results in lower utility payments.”相关问题
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第1题：
材料：
Spark erosion is caused by a voltage discharge between the main bearing and journal surface. The cause of the potential is the development of a galvanic element between the ship’s hull, sea water, and the propeller shaft/crankshaft.
The oil film acts as a dielectric. The puncture voltage in the bearing depends on the thickness of the oil film. With increasing engine ratings, the specific load in the main bearing is increased. his will reduce the oil film thickness, and enable the discharge to take place at a lower voltage level.
Since the hydrodynamic oil film thickness varies through a rotation cycle, the discharge will take place at roughly the same instant during each rotation cycle, i.e. when the film thickness is at its minimum. The roughening will accordingly be concentrated in certain areas on the journal surface. In the early stages, the roughened areas can resemble pitting erosion. but later, as the roughness increases, the small craters will scrape off and pick up white metal-hence the silvery white appearance.
Therefore, to ensure protection against spark erosion, the potential level must be kept at maximum 80 mV, which is feasible today with a high efficiency earthing device. If an earthing device is installed, its effectiveness must be checked regularly. Spark erosion is only observed in main bearings and main bearing journals.
问题：
According to the paragraph one, a voltage between the main bearing and journal surface is produced by______.
A.propeller rotation
B.leakage from M/E electric control unit
C.a galvanic element
D.friction between the main bearing and journal surface
______engine ratings increase, the hydrodynamic oil film between the main bearing and journal surface is______.A.The lower/thinner
B.The higher/the thicker
C.The lower/thicker
D.The higher/thinner
When will the spark erosion take place on the journal surface during each rotation cycle?A.when the film thickness is at its minimum
B.when the film thickness is at its maximum
C.when the engine is on its compression stroke
D.when the engine is on its exhaust stroke
During the engine room watch keeping, which equipment must be noted to ensure protection against spark erosion?A.the antifouling plant
B.the earthing device
C.the main engine electric heating coils
D.the shaft generator
请帮忙给出每个问题的正确答案和分析，谢谢！
问题 1 答案解析：C
问题 2 答案解析：D
问题 3 答案解析：A
问题 4 答案解析：B
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第2题：
共用题干
Water
Earth is like a big blue marble.From high above the Earth and from the moon,the planet gleams and shines.The blue water in the oceans and seas of the Earth makes a dramatic image.The white clouds above the Earth add beauty to the picture.Water is the source of this beauty and the source of life on Earth.It is the reason people can live on this planet. Water is everywhere.(46)_______.It is in the soil,the ground that grows the food.Water is in rock deep under the ground, in natural holding areas一in storage.In a real sense,water keeps Earth alive.
Nature has an unchanging amount of water. Nature has a perfect system for recycling water. (47)_____.It falls as rain.Then it goes to one of three places.It might sink slowly through the soil into the natural holding areas in the rock.(48)_______一by becoming vapor,or gas.It might run off into streams,rivers and oceans.By itself,nature can keep the balance and provide plenty of clean water for us.Nature recycles water.
However,people cause problems for this natural recycling system.Nature's recycling system can work well(49)________.Some ways that people upset nature are easy to understand.For example, dirty sewage（污水沟系统）water from homes and factories must not mix with drinking water. People get sick from drinking contaminated water. Sometimes water from factories goes into streams and rivers.It enters into the groundwater. It can flow into lakes too.This kind of contamination from industry(waste water from factories) can be dangerous for people.If water contains poisons and chemicals,it is poison.(50)________;some poisons kill people as well as birds and animals.Without knowing,people can upset nature's recycling system.
Lakes and rivers add beauty to the world. People enjoy water for entertainment purposes,too. People enjoy swimming and playing in the cool water of a lake in the summer. They like to ride on boats on rivers.Many people enjoy catching fish in the rivers.They fish for food and for sport.However,in some places,the water of the lakes and rivers is no longer safe.These rivers and lakes are contaminated.The fish are dying because of the chemicals from farms and factories.People cannot swim in the polluted water._________（49）
A:Poison makes people sick
B:It is in the air that people breathe
C:We can not live without water
D:Water is used again and again
E:only if people work with the system and not against it
F: It might disappear into the air quickly答案：E解析：文章前一句说水到处都存在，那么后一句应该跟此句有关系，而且下一句说“它存在土壤里”，因此选项B项“它在人们呼吸的空气里”是最合适的。
文章前一句说大自然有一个循环水的完美系统，那么后一句相关的选项只有D项“水可以一遍又一遍地反复利用”。
从本句的前后句看这是一个排比句式，三句话都是以it might开头，而后半句“变成蒸汽或水汽”更证明选项F是最合适的。
本句前一句讲人们会引起大自然循环体系的问题，那么空格里应该填入人们怎么做大自然的循环体系才能很好地运转。因此选项E“只有顺着这个系统，而不是对它造成破坏”是最佳选择。
本句前后句的关键词是“poison"，因此判断只有选项A“毒物使人生病” 最合适。 -
第3题：
What are two benefits for prospects, derived from the Cisco SBR methodology?（）
- A、creates a link between business and IT planning
- B、increases profitability
- C、increases customer loyalty
- D、lowers TCO
正确答案:A,D -
第4题：
What is the advantage of using DTX for an MS? （）
- A、Increases battery life
- B、Better Bit Error Rate (BQRE)
- C、Higher strength
- D、Increased bit rate
- E、Better voice quality
正确答案:A -
第5题：
What is the difference between the CUoD and Utility Capacity On Demand?（）
- A、Utility allows for activation of resources by the hour. CUoD allows for permanent access to additional resources installed into the system.
- B、Utility allows for permanent access to additional resources installed into the system. CuOD allows for activation of resources by the hour.
- C、Utility allows for activation of resources by the minute. CUoD allows for permanent access to additional resources installed into the system.
- D、Utility allows for a 30 day usage of additional resources installed into the system. CUoD allows for permanent access to additional resources installed into the system.
正确答案:C -
第6题：
问答题Practice 5 ● Your company has decided to invest some of this year’s exceptionally high profits in one of the following areas: ● New company buses ● Culture comparative Courses ● Special bonus payments. ● You have been asked to write a report recommending how the profits should be invested and what benefits they would bring respectively. ● Write 200-250 words on your Answer Sheet.正确答案： 【参考范文】
Introduction
The purpose of this report is to analyze how the company should reinvest its profits this year. Options under consideration include purchasing new company buses, providing language training courses and paying special bonuses.
Findings
Options under consideration
New company buses
Despite that the motorcade of company buses are aged, they are still good enough to use. They are equipped with comfortable sofa seats, air-conditioning system and even karaoke. Therefore, their hardware is definitely not out of date. In addition, engines of these vehicles were only replaced last year, and they all came from Bolvo which run very smoothly. As a result, new company buses would be out of the question.
Culture comparative courses
Since the company is planning to increase its international market shares, especially in China and Japan, attending culture comparative courses would be very help for employees to deal with business partners and customers in those regions. Furthermore, courses would also increase cohesion, that is to say, staff members would get on with each other as classmates. They would certainly keep in memory this special period of happy time for many years to come. Therefore, the idea of investing in culture comparative courses is not bad.
Special bonus payments
As is known to all, special bonus payments would stimulate motivations. However, they would not have immediate improvement on the company’s overall performances. In addition, there’s also a potential hazard regarding the resentment of stall ineligible for the payments. If a precedent for future payments is set, think about what we shall do then to boost the morale in a rainy day. Therefore, it would be unwise to invest in bonus payments.
Recommendations
To conclude, investing in culture comparative courses will achieve a win-win situation for both the company and staff. It is recommended that the company arrange courses in Chinese and Japanese for employees who have contact with partners and customers in the above regions. As for other members of staff who are interested, they should also be encouraged to participate in.解析： 暂无解析 -
第7题：
单选题What has the United Nations made up its mind to do from the passage?ASet an Earth Protecting Day
BProtect and love the earth
CHold an international meeting
DFind out what is making the pollution
正确答案： D解析：
由The United Nations的描述可知，他们已经决定要保护地球，爱护地球，因此答案为B项“Protect and love the earth”。 -
第8题：
单选题What issue is NOT addressed in the book?ASaving money on a rain barrel purchase
BEcological considerations of rain barrels
CConstructing your own rain barrels
DSetting up rain barrels
正确答案： C解析：
在第二段中，第二句话讲到分析了购买使用该系统节省的钱。对应A项。第三段第一、二句提到了书中会解释该系统的生态循环效益，对应B项。倒数第二句提到会包括如何安装该系统，对应D项。选项中只有C项在书中未提及。选择C。 -
第9题：
单选题What is the main advantage of a rain barrel system?AIt benefits the Earth by recycling water.
BIts efficiency increases in areas with little rainfall.
CIt utilizes technology that is centuries old.
DIt results in lower utility payments.
正确答案： C解析：
在第二段第一句“the most attractive aspect of rain barrel systems for many people is the potential monthly savings on water and wastewater bills”提到该系统可以节省水费。故D项符合题意。 -
第10题：
单选题Which of the following best describe the customer benefits of change management in the operate phase？ Select exactly 1 answer（s） from the following：（）。Areduce unnecessary disruption， delays， rework， and other problems by establishing test cases for use in verifying that the system meets operational， functional， and interface requirements
Bimprove its ability to make sound financial decisions by developing a business case based on its business requirements and establishing a basis for developing a technology strategy
Creduce operating costs and limit change-related incidents by providing a consistent and efficient set of processes
Dimprove the return on investment and hasten migration by identifying and planning for necessary infrastructure changes and resource additions， as well as reduce deployment costs by analyzing gaps early in the planning process to determine what is needed to support the system
正确答案： A解析： 暂无解析 -
第11题：
单选题In the horizon system of coordinates what is equivalent to latitude on the Earth?（）.AAltitude
BZenith
CDeclination
DZenith distance
正确答案： D解析： 暂无解析 -
第12题：
单选题Compared to a constant pitch propeller, a controllable pitch propeller（）.Amore efficiently uses available engine power
Boperates at a lower efficiency at a fixed speed
Cproduces the same torque at lower engine power
Ddevelops its rated power at a lower speed
正确答案： C解析： 暂无解析 -
第13题：
Name one major advantage of transporting gas under refrigeration．
A.It increases its volume
B.It reduces its volume
C.It has less product per volume
D.None of the above
正确答案：B
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第14题：
Which of the following best describe the customer benefits of change management in the operate phase？ Select exactly 1 answer（s） from the following：（）。
- A、reduce unnecessary disruption， delays， rework， and other problems by establishing test cases for use in verifying that the system meets operational， functional， and interface requirements
- B、improve its ability to make sound financial decisions by developing a business case based on its business requirements and establishing a basis for developing a technology strategy
- C、reduce operating costs and limit change-related incidents by providing a consistent and efficient set of processes
- D、improve the return on investment and hasten migration by identifying and planning for necessary infrastructure changes and resource additions， as well as reduce deployment costs by analyzing gaps early in the planning process to determine what is needed to support the system
正确答案:C -
第15题：
What are the benefits of using TCAM technology in high-end routing products ？（）
- A、Lower power consumption
- B、Lower maintenance cost
- C、Simplified configuration
- D、Deterministic performance
- E、Longer uptime
正确答案:D,E -
第16题：
Which of the following are benefits to server virtualization?（）
- A、Better server hardware leverage
- B、Increased application security
- C、Smaller backup window needed
- D、Lower power consumption
- E、Smaller datacenter footprint
- F、Little to no maintenance needed
正确答案:A,B,E -
第17题：
A customer is considering the purchase of an XIV system to leverage thin provisioning. They are concerned that their application will use all available space during formatting, which will remove any thin provisioning benefits. What should the storage specialist discuss with the customer?（）
- A、the possibility of changing the application so this no longer happens
- B、with the XIV system's SATA basedapproach, storage costs are so low that over-provisioning is not an issue
- C、the XIV system has immediate zero page reclamation features that will immediately return the volume to its original size
- D、the XIV system has a white space reclamation feature that will return the volume to its original thin provisioned size over time
正确答案:D -
第18题：
单选题A customer is considering the purchase of an XIV system to leverage thin provisioning. They are concerned that their application will use all available space during formatting, which will remove any thin provisioning benefits. What should the storage specialist discuss with the customer?（）Athe possibility of changing the application so this no longer happens
Bwith the XIV system's SATA basedapproach, storage costs are so low that over-provisioning is not an issue
Cthe XIV system has immediate zero page reclamation features that will immediately return the volume to its original size
Dthe XIV system has a white space reclamation feature that will return the volume to its original thin provisioned size over time
正确答案： B解析： 暂无解析 -
第19题：
单选题What has CSS recently undergone?AAn alteration to its organizational structure
BThe relocation of its headquarters
CA change in national leadership
DThe addition of new service areas
正确答案： D解析：
根据第1段最后1句our recent expansions…可知CSS最近在进行扩充。又根据第2段第2句focusing on any new service areas可知扩充区域为服务区域，故选D。 -
第20题：
单选题In the horizon system of coordinates what is equivalent to the equator on the Earth?（）.APrime vertical circle
BPrincipal vertical circle
CParallels of altitude
DHorizon
正确答案： B解析： 暂无解析 -
第21题：
单选题What is an advantage of an externally modulated laser over a directly modulated laser？ （）Alower cost
Bhigher chirp
Ceasier to manufacture
Dhigher dispersion tolerance
Ehigher optical signal-to-noise ratio
正确答案： B解析： 暂无解析 -
第22题：
单选题You are the network administrator for The network consists of a single Active Directory domain named All domain controllers run Windows Server 2003, and each one has a locally attached tape device. You need to back up each domain controller. Your backup process must fulfil the following requirements: System recovery must be possible in the event of server failure. The system configuration and all current dynamic disk configurations must be backed up. Other data partitions do not need to be backed up. What should you do?（）AUse the Backup utility to back up the system files and to create an Automated System Recovery (ASR) disk.
BUse the Backup utility to back up the contents of all mounted drives.
CUse the Backup utility to back up only the System State data.
DUse the Copy command to copy C:/windows and its subfolders to a shared folder on the network.
EUse the Xcopy command to copy C:/windows and its subfolders to a shared folder on the network.
正确答案： B解析： 暂无解析 -
第23题：
多选题What are the benefits of using TCAM technology in high-end routing products ？（）ALower power consumption
BLower maintenance cost
CSimplified configuration
DDeterministic performance
ELonger uptime
正确答案： C,A解析： 暂无解析 -
第24题：
单选题Name one major advantage of transporting gas under refrigeration.（）AIt increases its volume
BIt reduces its volume
CIt has less product per volume
DNone of the above
正确答案： A解析： 暂无解析