The main purpose of the piston oil scraper rings is to （）.

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• Which best describes the main purpose of Service Update Management Assistant （SUMA）？（）  

  A . Schedules the install AIX APARs and updates B . Automatically installs AIX APARs and updates via the HMc C . Schedules and automates the download of AIX APARS and updates D . Automatically queries existing machines and alerts when APARS and updates are available

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• The main purpose of inspection for a running diesel engine is（）

  A . testing for the mechanical load and the thermal load B . inspecting thermal and mechanical condition of the engine C . inspecting each system and exhaust temperature D . testing for compress pressure and explosion pressure

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• What is the main purpose of dunnage（）.

  A . To act as ballast for light vessels B . To provide ventilation and drainage for cargo C . To secure the tarpaulins in place D . To support weakened bulkhead

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• One of the main purposes of refractories in a boiler furnace is to（）

  A . help preheat the air for the furnaces B . help preheat the feedwater C . protect economizer from excessive heat D . prevent excessive furnace heat losse

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• The main purpose of changing main engine to electronic controlled is not to（）

  A . control fuel injection time more precisely B . control fuel injection rate more precisely C . meet the environmental requirements D . meet high engine speed requirement

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• pany uses MSTP within their switched LAN.  What is the main purpose of Multiple Instance  Spanning Tree Protocol （MSTP）？（）

  A .  To enhance Spanning Tree troubleshooting on multilayer switches B .  To reduce the total number of spanning tree instances necessary for a particular topology  C .  To provide faster convergence when topology changes occur in a switched network D .  To provide protection for STP when a link is unidirectional and BPDUs are being sent but not  received E .  None of the other alternatives apply

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• The main purpose of an electric space heater installed in a large AC generator is to （）

  A . prevent the windings from becoming brittle B . prevent moisture from condensing in the windings during shutdown C . prevent acidic pitting of the slip rings D . keep the lube oil warm for quick starting

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• Which best describes the main purpose of Service Update Management Assistant (SUMA)?（）

  A . Schedules the install AIX APARs and updates B . Automatically installs AIX APARs and updates via the HMC C . Schedules and automates the download of AIX APARS and updates D . Automatically queries existing machines and alerts when APARS and updates are available

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• The main purpose of starting the diesel engine on air briefly is（）

  A . to inspect if the cylinder has the water leakage B . to expel out the residual water/gas/oil from the cylinder C . to check if fuel supply is normal D . A and B

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• Which one of the following items is NOT a main purpose of an analogy?

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• The main purpose of a speech of presentation is to tell the audience why the recipient is receiving the award.

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• 2.What’s the main purpose of the BCC field?

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• What is the main purpose of Ms. Forsyth's email？

  A．To attempt to sell a second-hand vehicle B．To place an order for a vehicle part C．To describe the kind of car she is looking for D．To request a mechanical service

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• The author's main purpose in writing the last paragraph of the passage was to ______ .

  A．explain how cold viruses are transmitted B．prove that a poor diet causes colds C．discuss the relationship between income and frequency of colds D．analyze the distribution of income among the people in the study

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• What’s the main purpose of the passage？

  A．To inform. people the severity of the millennium bug. B．To accuse some comes for being inactive. C．To advise people to abandon the computers. D．To tell the readers the way to solve the millennium bug problem.

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• The main purpose of the passage is

  A. to describe how American children spend their summer. B. to explain the needs of the modern working families. C. to discuss the problems of the current school calendar. D. to persuade parents to stay at home to look after their kids.

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• The main purpose of the passage is to ________（）

  A．explain why couples grow alike B．tell how couples like each other C．discuss the function of marriage D．describe the life of happily-married couples

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• What is the main purpose of the lecture？

  A．To point out similarities in Emerson"s essays and poems B．To prepare the students to read an essay by Emerson C．To compare Emerson"s concept of universal truth to that of other authors D．To show the influence of early United States society on Emerson"s writing 此题为多项选择题。

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• What is the main purpose of this letter？

  A．To explain a new recycling policy B．To warn about inappropriate waste disposal C．To inform. about a schedule revision D．To promote a new garbage collection service

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• The main purpose of this passage is to discuss______.

  A．the contributions of household incomes to happiness B．the complex relationship between money and happiness C．the positive relationship between money and happiness D．the negative relations of money to happiness 此题为多项选择题。

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• What is the main purpose of writing the first memo？

  A．Reminding the company employees of how to send and receive mails B．Criticizing the company employees for some bad habits C．Informing the company employees of an important announcement from the post office D．Giving thanks to all the company employees

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• What is the main purpose of this email？

  A．To make a customer service complaint B．To congratulate on winning an award C．To request a special service D．To express gratitude to a company

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• What is the main purpose of the passage？

  A．To outline contrasting types of economic system. B．To explain the science of economic systems. C．To argue for the superiority of one economic system. D．To compare barter and money-exchange markets.

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• The central bank takes part in repurchase agreement market mainly for the purpose of（）

  A．Monetary policy operation B．liquidity maintenance C．Acquisition of benefits D．Raising ong-term available funds

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