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C.The term “multitasking” originally referred to a computer’s ability to carry out several tasks at one time. For many people, multitasking has become a way of life and even a key to success. In fact, some excellent mental aerobic exercises (人脑训练) involve engaging the brain in two or more challenging activities at a time. Although checking e-mail while talking on a phone and reading the newspaper may be second nature for some people, many times multitasking can make us less productive, rather than more. And studies show that too much multitasking can lead to increased stress, anxiety and memory loss.In order to multitask, the brain uses an area known as the prefrontal cortex (前额叶脑皮层). Brian scans of volunteers performing multiple tasks together show that as they shift from task to task, this front part of the brain actually takes a moment of rest between tasks. You may have experienced a prefrontal cortex “moment of rest” yourself if you’ve ever dialed (拨电话) and the answering, your mind shifted to anther thought or task, and then look that “moment” to come back. Research has also shown that for many volunteers. Job efficiency (效率) declines while multitasking as compared to when they perform. only one task at a time.Multitasking is easiest when at least one of the tasks in habitual, or requires little thought. Most people don’t find it difficult to eat and read the newspaper at the same time. However, when two or more attention –requiring tasks are attempted at one time, people sometimes make mistakes.We often don’t remember things as well when we’re trying to manage several details at the same time. Without mental focus, we may not pay enough attention to new information coming in, so it never makes it into our memory stores. That is one of the main reasons we forget people’s names---even sometimes right after they have introduced themselves. Multitasking can also affect our relationships. If someone checks their e-mail while on the phone with a friend, they may** off as absent-minded or disinterested. It can also cause that person to miss * overlook key information being passed on to them.49. Why are some mental aerobic exercises designed to engage people in multitasking?A. To make them more productive.B. To reduce their stress and anxiety.C. To develop their communication skills.D. To help them perform. daily tasks more easily.
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The marketplace where short-term debt securities are traded is referred to as ______.A.a mortgage marketB.a stock marketC.a bond marketD.a money market
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He used to feel confident ( ) language ability.A、in the term ofB、in terms ofC、in term ofD、in a term of
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______ measure the company' s ability to meet short-term obligations through the cash conversion cycle.A.Activity ratioB.Liquidity ratioC.Leverage ratioD.Profitability ratio
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The central processing unit(CPU), sometimes referred to as the processor, interprets (解释)and carries out the basic(26)that operate a computer.A.databaseB.filesC.blockD.instructions
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With the widespread use of the personal computer, many authorities in the field of(56)have pointed out the need for computer literacy.Unfortunately, there is no(57)agreement as to what the term "computer literacy" means. Some feel that computer literacy means knowing how to make the computer "compute"; that is knowing how to program computers in one or more programming languages.Others feel that knowing how to program is merely a small segment of computer literacy. These people(58)the major emphasis in schools should be on teaching how to effectively use the many software packages that are available.Still others suggest that computer literacy education is not required. They suggest that computers are being so rapidly integrated into our society that using a computer will be as(59)as using a telephone or a video tape recorder, and that special education will not be necessary. (60)of one's definition of computer literacy, it is recognized by most that learning to use a computer is indeed an important skill in modern society.A.cultureB.scienceC.educationD.industry
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The high-speed data services for the interconnection of computer networks are usually referred to as ______ connections.A.LANsB.MANsC.WANsD.ATM
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If you are loading fruit in reefer spaces and you notice that the fruit is beginning to mold,you should ______.A.carry the cargo at a cooler temperature than originally plannedB.write up exceptions on the cargoC.refuse to carry the cargoD.discharge CO2 into the compartment after loading
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Please arrange the survey ______ early.A.to be carried outB.carry outC.be carried outD.will carry out
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进行安全检查。()A、Carry out safety inspection.B、Carry out more detailed inspection.C、Carry out important inspection.D、Carry out relevant inspection.
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下面函数swap_p的功能是完成交换两个指针的操作。请按指定的顺序在题后的相应序号后填上适当的内容,使之成为完整正确的函数。swap_p(s,t)int(),();{int*term;term=();*s=();*t=_();}A、s(或t);*t(或*s);*s;*t;term;B、**s(或**t);**t(或**s);*s;*t;term;C、**s(或**t);**t(或**s);s;t;*term;D、s(或**t);t(或**s);*s;*t;term;
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What does the term computer language refer to?()A、BinaryB、DecimalC、HexadecimalD、OctalE、All of the above
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You are the network administrator for your company. An employee named Bruno uses a Windows 2000 Professional portable computer. When he starts the computer, Windows 2000 prompts him to select either a docked or an undocked mode. Bruno primarily works out of the office and does not use a docking station. What should you do?()A、 Modify the portable computer’s BIOS settings, and disable support for the docking stationB、 Modify the portable computer’s hardware profiles, to remove the Docked hardware profileC、 Modify the portable computer’s device settings to disable the Unplug devices icon in the system tray. D、 Modify the portable computer’s hardware profiles, and move the Docked hardware profile to the top of the list of hardware profiles.
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单选题Which statement is TRUE concerning a towing vessel which,due to the nature of her work,is unable to keep out of the way of another vessel?()A
By day,she shall carry a black cylinder shapeB
By day,she shall carry two black balls in a vertical lineC
By night,she would show the same lights as a vessel not under commandD
By day,she would show the same shapes as a vessel restricted in her ability to maneuver
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单选题If the Shipowner has failed to carry out a term of a time charter-party whereby he undertakes to maintain the vessel in a seaworthy state,this only()the Charterer to sue him for damages,and not to repudiate the charter-party.A
compliesB
entitlesC
suppliesD
provides
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单选题You are the network administrator for your company. An employee named Bruno uses a Windows 2000 Professional portable computer. When he starts the computer, Windows 2000 prompts him to select either a docked or an undocked mode. Bruno primarily works out of the office and does not use a docking station. What should you do?()A
Modify the portable computer’s BIOS settings, and disable support for the docking stationB
Modify the portable computer’s hardware profiles, to remove the Docked hardware profileC
Modify the portable computer’s device settings to disable the Unplug devices icon in the system tray. D
Modify the portable computer’s hardware profiles, and move the Docked hardware profile to the top of the list of hardware profiles.
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单选题Americans fully realized what Edison’s inventions meant when they _____.A
heard of his deathB
heard of the plan to honor himC
first used electric powerD
tried to carry out the plan
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单选题If the PSCO has clear grounds for carrying out a more detailed inspection,()A
the master should be immediately informedB
the master will be prohibited from contacting the Administration or other organizationC
he will carry out the inspection after the master be informed and be readyD
he will carry out the inspection without informing the master
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单选题The ability of an oil to separate cleanly from an oil and water mixture is referred to as its ().A
precipitation numberB
neutralization numberC
pour pointD
demulsibility
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单选题A helmsman receives the command “Right 15 degrees rudder.”The helmsman’s IMMEDIATE reply should be().A
Aye Aye SirB
Right 15 degrees rudderC
Rudder is right 15 degreesD
No reply is necessary,just carry out the order
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单选题0perational tests of ship’s equipment should()out.A
be carriedB
carryC
carryingD
to carry
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单选题We are going to carry out an emergency ().A
practiseB
practiceC
drillD
drills
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单选题The term BOLLARD PULL refers to a towing vessel’s().A
propulsion horsepower availableB
pulling ability at cruise powerC
towing winch capabilityD
pulling ability under static conditions
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单选题What does the term computer language refer to?()A
BinaryB
DecimalC
HexadecimalD
OctalE
All of the above
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单选题The term that indicates how many tons of cargo a vessel can carry is().A
bale cubicB
deadweightC
gross tonnageD
loaded displacement
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单选题The writer says that the Post-it note was invented as a result ofA
a researcher’s own initiative.B
research carried out by a group.C
research originally done on another product.D
a manager’s innovative idea.
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单选题A helmsman receives the command Right 15 degrees rudder. The helmsman’s IMMEDIATE reply should be().A
Aye Aye SirB
Right 15 degrees rudderC
Rudder is right 15D
No reply is necessary,just carry out the order
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单选题A vessel restricted in her ability to maneuver when engaged in an operation for the maintenance of safety of navigation in a traffic separation scheme is()complying with this rule to the extent necessary to carry out the operation.A
obligedB
to beC
exempted fromD
necessarily