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听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的[A]、[B]、[C]三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有5秒钟的时间阅读各个小题；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。 What is the woman going to do
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粉尘爆炸属于( )反应。日本安全工学协会编的《爆炸》一书中阐述了一种比较典型的粉尘爆炸机理：粉尘粒子通过热传导和热辐射，从火源获得能量，使( )温度急剧升高，达到粉尘粒子加速分解的温度和蒸发温度，形成粉尘蒸气，这种气体与空气混合后容易( )。
Denis: Hello, everyone. Welcome again to Consumer’s Choice, which is the last program in our present series. Isn’t that right, WendyWendy: Yes, that’s right. But we’ll be back again after summer break with a new series. We’ll tell you more about that later. But, first, in today’s program, we start off with the missing photographs. The story of how a listener’s determination has qualified her for our Consumer of the Month award, DenisDenis: Thank you, Wendy. This is the story of Miss Patty China who went on a holiday to Europe last month. This was her first ever trip abroad and one for which she’d been saving for 10 years. Her tour took her around 12 countries in 21 days. And being a keen photographer, she took lots of photographs; ten rolls of films, to be exact. About 360 photographs. When Patty got back home, she gave all her photos to Top-class Photo services for developing. And they vanished. She never saw them again. Of course, she was furious with the company and complained. They apologized and offered her compensation: l0 free rolls of films. This made her angry as ever. And she rejected this completely inadequate offer and asked for 2,000 dollars. The company refused her request. So Patty wrote them a letter, telling them to pay up in ten days or she would take them to court. She received no reply. So she did take them to court. But 2 days before the case was due to be heard, she received a cheque for 2,000 dollars. Top-class had obviously made their minds up on how the judge would decide. Patty’s case provides a lesson to us all. If we want our rights as consumers, we’ve got to fight for them. So for her determination and spirit we name Patty our Consumer of the Month.Wendy: Thank you, Denis. And now I’d like to deal with the problem that many of our listeners write about. Sale prices. When we go to a sale and see a sign on something saying 50 percent off or 300 dollars reduced to 100 how do we know the prices really have been reduced One of our listeners, Mr. Alvin Lok tells his story:" In a department store where I sometimes shopped, I saw a leather belt priced at 100 dollars. Too expensive to me. But I liked it and thought I might buy it next time the store had a sale. The store did have a sale. And I went back to look for the belt. It was there all right. But the ticket on it now read 200 dollars reduced to 150. The sale price was actually higher than the normal price. What can we, as consumers, do in a case like this The answer to Alvin’s question is that at the moment all we can do is to complain to the store’s management and bring these cases to the attention of the public. Bad publicity might help to put a stop to this dishonest practice. But Consumer’s choice will continue to press for the government to bring in laws similar to those in other countries to protect consumers by making it illegal to cheat them in this way. And now I’d like to tell you about our new consumer hot-line which came to operation Last month. So far we have received... The Consumer of the Month is().
Once the exclusive domain of executives with expense accounts, mobile phones are set to become one of the central technologies of the 21st century. (46) Within a few years, the mobile phone will evolve from a voice-only device to a multi-functional communicator capable of transmitting and receiving not only sound, but video, still images, data and text. A whole new era of personal communication is on the way.Thanks in part to the growth of wireless networks, the telephone is converging with the personal computer and the television. (47) Soon light-weight phones outfitted with high resolution screens--which can be embedded in everything from wristwatches to palm-held units will be connected to series of low orbit satellites enabling people to talk, send and receive E-mail, or take part in video conferences anytime, anywhere. These phones might also absorb many of the key functions of the desktop computer. Mobile devices are expected to be ideal for some of the new personalized services that are becoming available via the Internet.The communications revolution is already taking shape around the globe. In Europe, mall-scale trials are under way using mobile phones for electronic commerce. For example, most phones contain a subscriber identification module (SIM) card that serves primarily to identify a user to the phone network. Some manufacturers plan to upgrade the SIM card to an all-in-one personal identification and credit card. Another approach is to add a slot to mobile phones for a second smart card designed specifically for mobile ecommerce. (48) These cards could be used to make payments over the Internet or removed from the phone for use in point of-sale terminals to pay for things like public transportation, movie tickets or a round of drinks at the bar. In France, Motorola is currently testing a dual slot phone, the Star TACD, in a trial with France Telecom while in Finland Nokia is testing a phone that uses a special plug in reader for a tiny smart card. Siemens is pursuing a different approach. (49) Since it is not very clear whether it’s best to do everything with a single device, Siemens is developing dual slot phones and Einstein, a device equipped with a smart card reader and keypad that can be linked to the phone via infrared wireless technology. (50) For those who want to, though, it will be possible to receive almost all forms of electronic communication through a single device, most likely a three-in-one phone that serves as a cordless at home, a cell phone on the road and an intercom at work. "The mobile phone will become increasingly multifunctional," says Burghardt Schallenberger, vice president for technology and innovation at Siemens Information and Consumer Products. For those who want to, though, it will be possible to receive almost all forms of electronic communication through a single device, most likely a three-in-one phone that serves as a cordless at home, a cell phone on the road and an intercom at work.
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