從下面提供的答案中選出應(yīng)填入下列英文語句中______內(nèi)的正確答案。

Mobile computers—which(1)laptops, notebooks, subnotebooks and handhelds—(2)so ubiquitous in such a short time, no surprise to hear who say:"It will define the leading edge(3)the next five years or so."The most remarkable(4)mobile computers is the amount of data storage and memory packed(5)their tiny boxes. These devices not only handle windows easily but also run storage-hungry programs.

A、They have been equipped with modern multi-media teaching facilities.

B、Due to the digital information that exists everywhere, people’s old concepts are no longer true.

C、Information can be accessed by laptops, mobile phones, and iPods.

D、Students can do a lot of things that they couldn’t do in the past.

In general, ______ tend to be the most energy efficient one.

A．older laptops B．older desktops

C．newer desktops D．newer laptops

設(shè)方陣A=(a[subijsub])[subn×nsub]的元素全大于零，且A的每行元素之和均等于1.證明：

s well as voice applications. It【B1】the efficiency and productivity of workers in a【B2】of other business environments. Key wireless technologies and【B3】including wireless LANs, cell telephone and packet data networks, global tracking systems, mobile computing, wireless Internet access, and enhanced paging and dispatch systems. Wireless LAN products,【B4】wire-based networks, connect PCs, laptops, PDAs, and more to LANs but offer one important【B5】they allow you to move or "roam"【B6】while staying tied to your【B7】or the information on your wired network【B8】you can communicate with them【B9】you are, without ever losing the【B10】to the network,

Digital's wireless LAN products are clear leaders in the marketplace. Digital【B11】the industry's most complete portfolio(系列服務(wù)) of mobile and wireless products.【B12】such as wireless PC Cards, wireless ISA adapters and superior wireless bridge, digital cordless telephony【B13】desktop devices to communicate wirelessly with other wireless【B14】, or access network files, services, and devices on the wired network.

Wireless communication technology can also be used for【B15】time data collection in locations【B16】considered too remote, inaccessible or environmentally hostile for conventional wired monitoring systems. Mobile hosts such as notebook and palmtop computers are now widely【B17】and affordable. Today's laptops and notebooks come loaded【B18】almost all imaginable wireless communications devices. This gives desktop PC customers a choice of wireless technology【B19】best suits their mobility and application needs.

Other markets for wireless technology include customer service, retailing, and health care.【B20】every market in the service sector of the economy is a candidate for wireless technologies and services.

【B1】

A．reduces

B．improves

C．disturbs

D．provokes

customers bought 2 times as many Style. B notebooks as Style. C notebooks. Last week, customers bought 392 notebooks. What total amount did customers pay for the 392 notebooks？

A.$490.00

B.$560.00

C.$588.00

D.$686.00

E.$784.00

They removed personal items-bags，notebooks，her six-year-old son's ______(belong)from the car.

Antoine will select 3 notebooks from the bin. How many different selections of 3 notebook styles are possible？

(Note: The order in which the notebooks are selected does not matter.)

A.3

B.6

C.10

D.14

E.27

ergencies, when you've【21】a car accident, for instance. A mobile phone【22】save your life! Mobile phones are also【23】because they have many good features—we can take photos and send them all over the world. But every coin has two sides. The【24】thing about mobile phones is that you have no privacy. My boss and friends find me whenever they want! I haven't enjoyed a whole quiet day since the day I【25】my mobile phone.【26】disadvantage is that mobile phones make us lose good habits, such as punctuality. Before, when we【27】keep in touch so easily, if we had a date with someone, we tried our best to arrive【28】time. But now, because of the mobile phone, we are not afraid of【29】late any more, so, surprisingly enough, we make people wait! The third【30】I see is that I change my mobile phone once a year, and this means I'm spending【31】too much money on it. I think it is important to think【32】we use mobile phones. We should use things such as mobile phones, laptops, cameras, the Internet, and so on,【33】our needs. We can【34】our mobile phone when we don't want to be disturbed by【35】. If we know how to use it, we can eliminate its disadvantages.

(41)

A．have

B．made

C．had

D．crashed