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Nor is electronic multitasking entirely new:We've been driving while listening to car radios since they became popular in the 1930s.
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Recently, there’s been much theft in the school. What security measures shall we take then?A.We can install cameras and set up police line for you.B.We can install infrared surveillance cameras and intrusion alarms for you.C.We can install alarming system for you.D.We can equip techniques and electronic system for you.
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A. took part inB. take part inC. would take party inD. have taken part in
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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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A sample of our new beef extract has been sent to you today()parcel post, and we hope it will reach you()perfect condition.
A、with ⋯inB、in⋯byC、on⋯withD、by⋯in
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I’ve been telling her time and again that we can’t ______ another holiday, but she won’t listen.
A. spendB. saveC. affordD. stress
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We don’t need air conditioning, ___.
A.nor can we afford itB.neither can afford itC.and we can neither afford itD.and nor we can afford it
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——Guess what ,we’ve got our visas for a short —term visit to the UK this summer. ——How mice! you a different culture then.A.will be experiencingB.have experiencedC.have been expriencingD.will have experienced
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We can infer from the passage that_____.［A］ Shearer has experienced many violent incidents ［B］ new tools have been used to investigate terrorists［C］ FBI has been active in the war on eco-terrorism ［D］ ELF openly declares its beliefs and ends
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Such animals as South China tigers are believed __________ ., for we've had no track of them for ages.
A．becoming extinct
B．to become extinct
C．to have been extinct
D．having been extinct
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Such animals as South China tigers are believed_______, for we’ve had no track of them for ages.A.becoming extinct
B.to become extinct
C.to have been extinct
D.having been extinct
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Given the advantages of electronic money,you might think that we would move quickly to the cashless society in which all payments are made electronically.1 a true cashless society is probably not around the corner.Indeed,predictions have been 2 for two decades but have not yet come to fruition.For example,Business Week predicted in 1975 that electronic means of payment would soon"revolutionize the very 3 of money itself,"only to 4itself several years later.Why has the movement to a cashless society been so 5 in coming?Although electronic means of payment may be more efficient than a payments system based on paper,several factors work 6 the disappearance of the paper system.First,it is very 7 to set up the computer,card reader,and telecornmunications networks necessary to make electronic money the 8 form of payment Second,paper checks have the advantage that they 9 receipts,something that many consumers are unwilling to 10.Third,the use of paper checks gives consumers several days of"float"-it takes several days 11 a check is cashed and funds are 12 from the issuer's account,which means that the writer of the check can cam interest on the funds in the meantime.13 electronic payments arc immediate,they eliminate the float for the consumer.Fourth,electronic means of payment may 14 security and privacy concerns.We often hear media reports that an unauthorized hacker has been able to access a computer database and to alter information 15 there.The fact that this is not an 16 occurrence means that dishonest persons might be able to access bank accounts in electronic payments systems and 17 from someone else's accounts.The 18 of this type of fraud is no easy task,and a new field of computer science is developing to 19 security issues.A further concern is that the use of electronic means of payment leaves an electronic 20 that contains a large amount of personal data.There are concerns that government,employers,and marketers might be able to access these data,thereby violating our privacy.6选？A.for
B.against
C.with
D.on
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单选题Such animals as South China tigers are believed ______,for we've had no track of them for ages .A
becoming extinctB
to become extinctC
to have been extinctD
having been extinct
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单选题What is the main idea of this passage?A
How is multitasking define（定义） in the information age?B
How do people see new technology and the social change it brings about?C
How does technology change modern family life?D
What's the impact of multitasking on young people?
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单选题Based on the example provided in the passage, we can tell that when a spider is removed to a new position where half of a net has been made, it will probably _____.A
begin a completely new netB
destroy the half-netC
spin the rest of the netD
stay away from the net
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问答题Practice 7 The city government recognizes that citizens have certain new needs. To better meet your needs, we have made several changes in community facilities in 2009. Three stations for the suburbs have been added to the western train service. Broadband(宽带) cable is now available to all parts of the city. 5,000 new books were bought for the City Library. Some new facilities at the city hospitals have been installed. Next year, we will try our best to make your life even better.
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单选题—Do you think we can ______ the package arriving tomorrow? —I hope so. We’ve been waiting for a long time.A
add upB
count onC
fill outD
get over
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