题目内容
（请给出正确答案）
A.2
B.4
C.10
D.12
E.18
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“Two cell phone companies, Integratel and Youcell, both have a calling plan with500 peak mi”相关的问题
The best title for the passage is ______.
A．Search for better phone power.
B．Development of cell phone battery.
C．Competition between two electronic firms.
D．Advantage and disadvantage of methanol fuel.
A.Apple II in 1977 and the IBM PC in 1981
B.MAC
C.Cell phone
D.Apple TV
What is the problem that Shane is dealing with？
A．A malfunction in the computer system
B．A funding problem
C．A problem with his cell phone
D．A conflict between the two departments
How could the breakup potentially hurt the interest of consumers？
A．The breakup led to a setback: Windows 2000 won't be shipped to consumers until February, two years behind schedule.
B．The pay-per-minute model of the cell phone industry will meld with the free culture of the Internet.
C．The breakup could increase the operating costs and thus make their products more expensive.
Cell Phone Lets Your Secret Out
Your cell phone holds secrets about you. Besides the names and【51】 that you've programmed into it, traces of your DNA linger on the device, according to a new study.
DNA is genetic material that【52】 in every cell. Like your fingerprint, your DNA is unique to you【53】 you have an identical twin. Scientists today routinely analyze DNA in blood, saliva, or hair left【54】 at the scene of a crime. The results often help detectives identify【55】 and their victims. Your cell phone can reveal more about you【56】 you might think.
Method J. McFadden, a scientist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the【57】. This made her wonder whether traces of DNA lingered on cell phones—even when no blood was involved.【58】she and colleague Margaret Wallace of the City University of New York analyzed the flip-open phones of 10 volunteers. They used swabs to collect【59】 traces of the users from two parts of the phone: the outside, where the user holds it, and the【60】 , which is placed at the user's ear.
The scientists scrubbed the phones using a solution made mostly【61】alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phones【62】for another week. Then the researchers collected the phones and repeated the swabbing of each phone once more.
The scientists discovered DNA that【63】to the phone's speaker on each of the phones. Better samples were collected from the outside of each phone, but those swabs also picked up DNA that belonged to other people who had apparently also handled the phone.【64】, DNA showed up even in swabs that were taken immediately after the phones were scrubbed. That suggests that washing won't remove all traces of evidence from a criminal's device. So cell phones can now be added to the【65】of clues that can clinch a crime-scene investigation.
(51)
A．numbers
B．music
C．secrets
D．films
Cell Phone Lets Your Secret Out
Your cell phone holds secrets about you. Besides the names and【51】 that you've programmed into it, traces of your DNA linger(逗留) on the device, according to a new study.
DNA is genetic(遗传的) material that【52】 in every cell. Like your fingerprint, your DNA is unique to you【53】 you have an identical twin. Scientists today routinely analyze DNA in blood, saliva(涎，唾液), or hair left【54】 at the scene of a crime. The results often help detectives identify【55】 and their victims. Your cell phone can reveal more about you【56】 you might think.
Meghan J. McFadden, a scientist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the【57】 This made her wonder whether traces of DNA lingered on cell phones -- even when no blood was involved.【58】 she and colleague Margaret Wallace of the City University of New York analyzed the flip-open phones(翻盖手机) of 10 volunteers. They used swabs(药签) to collect【59】 traces of the users from two parts of the phone: the outside, where the user holds it, and the【60】, which is placed at the user's ear.
The scientists scrubbed(用力擦洗；擦净) the phones using a solution made mostly【61】alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phones
【62】for another week. Then the researchers collected the phones and repeated the swabbing of each phone once more.
The scientists discovered DNA that【63】to the phone's speaker on each of the phones. Better samples were collected from the outside of each phone, but those swabs also picked up DNA that belonged to other people who had apparently also handled the phone.【64】, DNA showed up even in swabs that were taken immediately after the phones were scrubbed. That suggests that washing won't remove all traces of evidence from a criminal's device. So cell phones can now be added to the【65】of clues that can clinch(确定，决定) a crime-scene investigation.
(51)
A．numbers
B．music
C．secrets
D．films
What is the View-R？
A．A cell phone.
B．A TV.
C．A radio.
D．A computer.
Laurence Lennon, 44, said he was running late that day. He was talking to his manager on his cell phone when he dashed out of the cab. He said that he gave the driver ＄60 and told him to keep the change. He walked through the front doors of the concert hall still talking on the phone to his manager.
Upon discovering his loss, Lennon used his cell phone to call the police. (33) The policewoman asked him for the name of the cab company, the number of the cab, and the name of the driver. He said that she had to be kidding.
She told Lennon that he could file a missing items report at the police station or online. (34) She told him that finding the guitar might take a couple of years, as finding guitars was not as important as finding murderers and drug-takers.
Lennon considered that year depressing, as he had to postpone the recording of two new CDs. He has been using borrowed guitars, and he was losing hope of ever recovering his guitar.
Lennon was reunited with his ＄100,000 guitar yesterday. The case and the guitar had been discovered in the comer of a coffeehouse only two blocks from where Lennon had lost it in the first place. Lennon had offered a＄ 10,000 reward for its return. (35)He said he would give the reward to the coffeehouse owner, who had found the guitar and notified the police. The police department prepared a news release about its success in tracking down the guitar.
(33)
A．Two years ago, in a taxicab.
B．Two years ago, in a coffeehouse.
C．One year ago, in a taxicab.
D．One year ago, in a coffeehouse.
Translate into Chinese. 1.Each cell phone, when it makes a call, is connected (via its antenna and electromagnetic radiation to the base station with the best apparent communication path. The base stations in a given area are connected to a mobile telephone switching office (MTSO) by high speed wire, fiber, or microwave connections. 2.All of the newer cellular systems are digital (I.e., use a binary interface), and thus, in principle, can be used for voice or data. Since these cellular systems, and their standards, originally focused on telephony, the current data rates and delays in cellular systems are essentially determined by voice requirements. 3.One approach to channel measurement is to allocate a certain portion of each transmitted packet for that purpose. During this period, a known probing sequence is transmitted and the receiver uses this known sequence either to estimate the current values for the taps in the discrete-time baseband model of the channel or to measure the actual paths in a continuous-time baseband model. 4.It appears that many wireless situations, particularly those in cellular and local area networks contain a relatively small number of significant coherent paths, and if the bandwidth is large enough to resolve these paths, then the gain is far greater than that indicated in the example above. 5.The resulting binary stream, after adding the long PN sequence, is at a rate of 1.2288 Mbps. This stream is duplicated into two streams prior to being quadrature modulated onto a cosine and sine carrier.
听力原文： (33)Researchers report that doing two or more things at once may decrease efficiency and actually take extra time switching from one task to another. In the most severe cases, it can even mean the difference between life and death.
In the study, four groups of young adults carried out a series of tasks and switched between different tasks, some complicated, such as solving math problems, and some more familiar, such as identifying geometric shapes. (34)The researchers found that time was lost in just switching from one task to another, and that time costs increased with the complexity of the tasks. “For each aspect of human performance—perceiving, thinking and acting people have specific mental resources whose effective use requires supervision through executive mental control,” said the lead author, David Meyer in materials provided with the report.
So-called“ multitasking” is becoming increasingly common because of cell phones and computers. the researchers point out, but it may just be adding wasted time and inefficiency to our days. A mere half second of time lost to task switching can mean the difference between life and death for a driver using a cell phone, Meyer said. (35)The authors say the research should make employers and employees think twice before implementing multitasking.
(30)
A．Multitasking is inefficient and wastes time.
B．Multitasking is a matter of life and death.
C．Multitasking is the process of executive control.
D．Multitasking is becoming increasingly common.
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