考前必看：2021年考研英语工学类阅读理解模拟题及答案（二十四）

发布时间：2020-10-12

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目前，2021年考研初试备考时间已不足三个月，不知各位小伙伴复习的如何了？在最后阶段，我们最需要做的是了解考试，而试题练习无疑是非常不错的方法。为了帮助大家备考，51题库考试学习网在下面为大家带来考研初试的一些模拟试题，一起练起来吧。

Bragging about your fancy new cell phone is a fleeting pleasure; after all， today\'s coolest models tend to be next month\'s paperweights. By contrast， the half-life of a cordless phone for the home is measured in years. So if you really want to be ahead of the tech curve， forget the cell-phone wars and check out the new 5.8-GHz cordless phones.

Named after the frequency of the radio wave (measured in billions of cycles per second) that carries the signal between the handset and the base station， 5.8-GHz phones promise more clarity because there are fewer devices that operate on the same frequency and thus fewer to cause interference. If you have a cordless phone that is a couple of years old or even a new one that costs less than $50， chances are it is a 900-MHz model that is highly susceptible to static or buzzing from baby monitors， wireless speaker systems and your neighbors\' 900-MHz phones. The newer 2.4-GHz units， introduced as an improvement over the 900-MHz models， do get less static， but wireless home networks and microwave ovens can still trigger a snap-crackle-pop effect. Not so the 5.8 GHz. So far， only a few companies sell the new models， and they don\'t come cheap. Uniden\'s TRU5865 costs $149， while the Vtech 5831 is $179. I preferred the Uniden because it was static free both inside my apartment and up to a block away. Its compact design hides the antenna inside the handset， and the glowing orange keys and display look sharp. The VTech got equally clear reception indoors， but I could stray only a few buildings down the block before buzzing set in.

But is it really worth an extra $100 (or more) to step up to 5.8 GHz? Maybe. When I tried out the Panasonic KX-TC1481B， a $39 900-MHz model， I could hear other conversations and even music coming through the phone. I got much clearer reception with the Motorola MA351， a $60 2.4-GHz model——except when I turned on my microwave oven and was assaulted by weird vibrating noises coming through the handset. Still， the Motorola is a decent option at a fair price.

No matter which kind of phone you\'re considering， a few other factors are worth keeping in mind. First， ask about battery life. While I liked the reception best on the Uniden， for example， it can go only four hours between charges vs. eight on the Vtech.

Next， find out if the phone is analog or digital. Both 5.8-MHz phones are digital， but that\'s not always the case with the models that use other frequencies， and this makes them an easier target for eavesdroppers. The best digitals use digital spread-spectrum (DDS) technology， which sends the signal down a broad range of frequencies to ensure that it gets through.

Finally， shop at a store that offers a money-back guarantee. That way you can torture test the phone for a few days. Then， once you\'re certain everything\'s O.K.， go ahead and start bragging about it to all your friends.

注(1)：本文选自Time; 12/2/2002， p104， 3/4p， 3c;

注(2)：本文习题命题模仿对象2004年真题Text 1;

1. How does the author introduce the topic?

[A]Explaining a phenomenon.

[B]Justifying an assumption.

[C]Posing a contrast.

[D]Making a comparison.

2. Which of the following can be an advantage of Vtech over Uniden?

[A]A longer battery life.

[B]Free of static interference.

[C]Fashionable outlook.

[D]Compact design.

3. The expression “susceptible to”(Line 5， Paragraph 2) most probably means __________.

[A]relevant with

[B]adaptable to

[C]immune from

[D]sensitive to

4. What is the most distinctive feature of 5.8-GHz phones?

[A]Fairer price.

[B]Higher clarity.

[C]More attractive model.

[D]No easier target for eavesdroppers.

5. Which of the following is true according to the text?

[A]It is worthwhile to buy any of 5.8-GHz phones.

[B]Battery life determines your selection of the phone.

[C]The earlier you bought the phone， the more static interference you got.

[D]5.8-GHz phones are becoming popular with consumers.

答案：CADBC

以上就是51题库考试学习网为大家带来的全部内容，希望能给大家一些帮助。51题库考试学习网提醒：目前2021年考研大纲已经公布，小伙伴们在复习时要注意以大纲为准哦。另外，小伙伴们如果还有其他关于考研信息的疑问，也可以留言咨询哦。

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下面小编为大家准备了 研究生入学 的相关考题，供大家学习参考。

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