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题型:阅读理解 题类:常考题 难易度:普通

山西省实验中学2020届高三上学期英语阶段性测评试卷

阅读理解

    You're probably used to the regular upgrades in our cell-phone networks. There was 2G, which came along in 199l, replaced with 3G in 2001, followed by 4G in 2009. Now we're hearing about the coming of 5G.

    But 5G is a much bigger leap than before. 5G, of course, is much faster than 4G in the real world and a 5G phone in a 5G city will enjoy Internet speeds between 9 and 20 times as fast. The arrival of 5G also means enormous leaps forward in capacity-so much that every cell-phone plan will offer cheap, truly unlimited Internet access. "The consequences of that are huge," says Sherif Hanna, Qualcomm's director of 5G marketing. For example, apps will no longer degrade (降低) your video quality or postpone downloading when you're out of Wi-Fi range. In fact, you'll probably prefer to do your downloads when you're on cellular (使用流量) because 5G will be much faster than whatever service you've got at home or work.

    "However, not everyone is excited by the 5G development. The new standard gets its speed partly by using existing transmission(传输) frequencies more efficiently and partly by using the millimeter wave range. That's a big, juicy line of radio frequencies that are currently underused because millimeter wave is really hard to use," Hanna says.

    These frequencies are much higher than anything we've used for the cellular, which means they can offer unbelievable speed-but at the cost of range. Millimeter wave cellular towers have to be about 500 feet apart. Cell carriers not only will have to upgrade all their cell transceivers (called small cells) but will install(安装) a lot more of them as well.

    That's why the millimeter wave flavor of 5G, the superfast coverage, will be available only in densely populated cities such as New York and San Francisco. In suburban and rural areas, 5G will bring a speedup of "only" nine times faster.

(1)、What advantages does 5G have over previous networks?
A、5G is much faster and more convenient. B、5G allows users to download more videos. C、5G can provide better service and news at home. D、5G cell-phone plans are expensive but more accessible.
(2)、Hanna's words in paragraph 3 reflect           .
A、popularity of the coming of 5G B、easy access to the 5G development C、concern about the 5G development D、excitement about the 5G development
(3)、What can we learn about 5G according to the text?
A、It requires more cellular towers. B、It won't be available in rural areas. C、It won't show speed improvements in suburbs. D、It makes some populated cities even more crowded.
(4)、Where is the text most likely from?
A、A tour brochure. B、A science newspaper. C、A medical magazine. D、An experimental textbook.
举一反三
根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Easy Ways to Improve Your Mood

    {#blank#}1{#/blank#} Taking an extra moment for yourself will make your day brighter and give you a healthier outlook on life. Here are some simple ways you can bring a little happiness into your life right now:

    Go for a walk.

    Grab your dog, best friend, or your significant other and head out on a brisk(轻快的) walk. Just a little bit of exercise can improve your mood and give you a fresh perspective on problems that have been bothering you. Think walks are boring? {#blank#}2{#/blank#} Take a trip to the mall, or even walk to get some frozen yogurt. Make it a fun trip and you'll surely make it part of your routine.

    {#blank#}3{#/blank#}

    After all, laughter is the best medicine. Pick up something that makes you laugh like a funny picture, book, magazine, or a DVD of your favorite comedy. {#blank#}4{#/blank#} Giving yourself time to laugh increases feel-good endorphins(胺多酚).

    {#blank#}5{#/blank#}

    Take a photo of yourself doing something you enjoy, like roller skating, skiing, swimming, playing an instrument, or being with friends and family. Place the picture on your desk to remind yourself that you lead an amazing life and have lots to be happy about.

A. Model behavior.

B. Buy something silly.

C. Ten minutes of relaxation can do wonders.

D. Try walking to a place that seems exciting to you.

E. You could even plan a date night out to a comedy club.

F. Tell someone that you're guaranteed to brighten their day.

G. Even the most optimistic people can use a mood boost every once in a while.

根据短文理解,选择正确答案。

How to save money to visit Shanghai Disneyland?

    The “happiest place on earth” is a top destination on many families' bucket lists. But taking a vacation to Disney World can be difficult to do on a budget. There are some considerations that you can make to reduce the cost of your Disney World vacation.

1)Buy Souvenirs in Advance

    Disney has influenced practically every industry, which makes it easy to find Disney items anywhere, from Walmart, Target, and your local grocery store to department stores and Amazon. You can save a lot of money by purchasing items before your trip at these less-expensive places than at Disneyland.

2)Make an Autograph Book

    An autograph (亲笔签名)book is seen as a must-have by many Disneyland enthusiasts and is a memory you can take home with you. These books can cost anywhere from $7.95 to $19.95 at the Disney Store and up to $30 for the latest-and-greatest autograph book at Disneyland, such as the park's 60th anniversary edition. Other choices can get the job done for under $5. For example, you can buy a small photo album; cute pads or notebooks.

3)Eat Breakfast Before You Arrive

    Breakfast is almost as pricey as lunch or dinner if you eat inside the Disneyland parks. If you have a hotel with a free breakfast, take advantage of it. If you want to eat out, eat at a local restaurant that is inexpensive or has a kids' menu, such as McDonald's which is close to the park.

4)Take Advantage of Discounts Offered to Special Groups

    Disney offers a wide variety of discounts, including for military service members, college students, teachers, and youth groups. If you think you might qualify for a special discount or group rate, call the Disneyland Resort to book tickets.

根据短文理解,选择正确答案。

    When you get in your car, you reach for it. When you're at work, you take a break to have a moment alone with it. When you get into a lift, you play with it.

    Cigarettes? Cup of coffee? No, it's the third most addictive(使人上瘾的) thing in modern life, the cell phone. And experts say it is becoming more difficult for many people to curb their wishes to hug it more tightly than most of their personal relationships.

    With its shiny surface, its smooth and satisfying touch, the cell phone connects us to the world even as it disconnects us from people three feet away. It affects us in ways its inventors in the late 1940s never imagined.

    Dr. Chris Knippers, an expert at the Betty Ford Center in Southern California, reports that the overuse of cell phones has become a social problem not much different from other harmful addictions: a barrier to one-on-one personal contact, and an escape from reality.

    Sounds extreme, but we've all witnessed the evidence: the person at a restaurant who talks on the phone through an entire meal, ignoring his kids around the table; the woman who talks on the phone in the car, ignoring her husband; the teen who texts messages all the way home from school, avoiding contact with kids all around him. Is it just rude, or is it a kind of unhealthiness? And pardon me, but how is this improving the quality of life?

    Jim Williams, an industrial sociologist based in Massachusetts, he points to a study by Duke University researchers that found one-quarter of Americans say they have no one to discuss their most important personal business with. Despite the growing use of phones, e-mail and instant messaging, in other words, Williams says studies show that we don't have as many friends as our parents. “Just as more information has led to less wisdom, more acquaintances(熟人) through the Internet and cell phones have produced fewer friends,” he says.

    If the cell phone has truly had these effects, it's because it has become very widespread. In 1987, there were only 1 million cell phones in use. Today, almost 300 million Americans carry them. The number of cell phones is far more than that of wired phones in the United States.

阅读理解

    Solar energy systems/power plants do not produce air pollution, water pollution, or greenhouse gases. Using solar energy can have a positive, indirect effect on the environment, when solar energy replaces or reduces the use of other energy sources that have larger effects on the environment.

    However, some poisonous materials and chemicals are used to make the photovoltaic (光电池的) cells that convert sunlight into electricity. Some solar thermal (保热的) systems use potentially hazardous liquids to transfer heat. Leaks of these materials could be harmful to the environment. U. S. environmental laws regulate the use and settlement of these types of materials.

    As with any type of power plant, large solar power plants can affect the environment near their locations. The placement of the power plant may have long-term effects on the habitats of native plants and animals. Some solar power plant-s may require water for cleaning solar collectors and concentrators or for cooling turbine generators. Using large volumes of ground water or surface water in some dry locations may affect the ecosystems that depend on these water resources. In addition, the beam of concentrated sunlight a solar power tower creates can kill birds and insects that fly into the beam.

    The amount of solar energy that the earth receives each day is many times greater than the total amount of all energy that people consume each day. However, on the surface of the earth, solar energy is a variable and irregular energy source. The amount of sunlight and the intensity of sunlight varies by time of day and location. Weather and climate conditions affect the availability of sunlight daily and on a seasonal basis. The type and size of a solar energy collection and conversion system determines how much of the available solar energy we can convert into useful energy.

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