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题型:阅读理解 题类:常考题 难易度:普通

广西贵港市2017-2018学年高二下学期英语期中考试试卷

阅读理解

    Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

    “To provide enough power, we need certain methods with high energy density (密度)”,said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope (放射性同位素) battery can provide power density that is much higher than chemical batteries.”

    Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro/nanoelectromechanreal systems (MNEMS) Although nuclear batteries can cause concerns, Kwon said they are safe.

    “People hear the word 'nuclear' and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”

    His new idea is not only in the battery's size, but also in its semiconductor(半导体). Kwon's battery uses a liquid semiconductor rather than a solid semiconductor.

    “The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”

    Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery, In the future, they hope to increase the battery's power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.

(1)、Which of the following is TRUE of Jae Kwon?
A、He developed a chemical battery. B、He teaches chemistry at MU. C、He made a breakthrough in computer engineering. D、He is working on a nuclear energy source.
(2)、Liquid semiconductor is used to           .
A、reduce the damage to lattice structure B、test the power of nuclear batteries C、decrease the size of nuclear batteries D、get rid of the radioactive wasteo32
(3)、According to Jae Kwon, his nuclear battery        .
A、uses a solid semiconductor B、will soon replace the present ones C、could be extremely thin D、has passed the final test
(4)、The text is most probably a        .
A、book review B、science news report C、newspaper ad D、science fiction story
举一反三
阅读理解

    Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.

    Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses(球场) in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.

    There are many environment-friendly sports. Power walking is one of them that you could take up today. You don't need any special equipment except a good pair of shoes; and you don't have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.

    Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be "green gyms". They are better replacements(代替物) for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it's free.

根据短文理解,选择正确答案。

English Conversation

Leader: Mandi Ashmore

english@ iwc-lausanne. org

    We meet on Mondays at 14:30 at the IWC clubhouse. We chat for about an hour and discuss everything. Mandi asks “students” to contact her on Monday to confirm the class as sometimes she needs to cancel for various reasons or occasionally she may choose to hold the class at a different venue(举办地点) or at an earlier time for us to be able to have lunch together.

French Conversation, Advanced Beginner

Leader: Marielle Sulmoni

frenchconvo@ iwc-lausanne. org

    I'm French (born in Bordeaux) and Swiss by marriage. I hold an advanced beginners' French conversation class on Tuesday afternoons from 14:30 - 16:00. We meet weekly at the clubhouse in a friendly atmosphere. I hope to help you use your knowledge of French, allowing you to speak with no fear of making mistakes, which in time will become fewer and fewer.

French Language Lab, Beginner

Leader: Maija Remlinger

frenchlab@ iwc-lausanne. org

    The group meets on Thursday afternoons from 15:00-16:30 at the clubhouse. The first half of the class is devoted to reading out loud from the book “Easy French Reader”, working on pronunciation and phrasing. During the second half, we listen to audio recordings from “New French with Ease” and work on oral comprehension.

French Conversation, Advanced

Leader: Juliette Brull

french@ iwc-lausanne, org

    We meet every Tuesday at the IWC clubhouse from 9:30-11:00. Most of our time is devoted to very lively discussions about current events and various topics. We also read a book written by a French author and sometimes we see a French movie.

阅读理解

    Social change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many ways. The simple reason for this is that there are more different ways of looking at things present in the first kind of society. There are more ideas, more disagreements in interest, and more groups and organizations with different beliefs. In addition, there is usually a greater worldly interest and greater tolerance in mixed societies. All these factors tend to promote social change by opening more areas of life to decision. In a society where people are quite similar in many ways, there are fewer occasions for people to see the need or the opportunity for change because everything seems to be the same. And although conditions may not be satisfactory, they are at least conventional and generally agreed.

    Within a society, social change is also likely to occur more frequently and more readily in the material aspects of the culture than in the non-material, for example, in technology rather than in values; in what has been learned later in life rather than what was learned early; in the less basic and less emotional aspects of society-than in their opposites; in the simple elements rather than in the complex ones; in form rather than in substance; and in elements that are acceptable to the culture rather than in strange elements.

    Furthermore, social change is easier if it is gradual. This is one reason why change has not come more quickly to Black Americans as compared to other American minorities, because of the sharp difference in appearance between them and white people.

根据短文内容,选择最佳答案,并将选定答案的字母标号填在题前括号内。

根据短文理解,选择正确答案。

    Dolphins (海豚) live in a dark underwater world. It's often impossible to see each other or anything else around them, so sound plays an important role in their survival. To communicate with each other, dolphins produce all kinds of sounds.

    Only other dolphins understand what the sounds mean. Scientists haven't uncovered their secret communication, except for one kind of whistle. It might last less than a second, but this whistle is a big deal. Why? Because these whistles are actually names of dolphins — and every dolphin has one. Scientists call these sounds a “signature whistle.” When other dolphins hear the whistle, they know which dolphin is calling.

    Dolphins often hunt by themselves but still need to stay connected to the group. Since they can't always see each other, dolphins use their signature whistles to check in with other dolphins hundreds of yards away. “In coastal areas, dolphins exchange whistles even when they're a third of a mile apart,” says Greg Campbell, who studies animals. That means dolphins shout out to group members that might be nearly five football fields away.

    What's amazing is who names the baby dolphin. Not the mother. Not an auntie dolphin or another group member. Scientists believe the baby dolphin itself comes up with the signature whistle. Like human babies, a baby dolphin plays with sounds throughout its first year. While testing its sound skills, a baby dolphin is doing something amazing. It's creating or figuring out its signature whistle. How or why it chooses its signature whistle is not clear. Studies show that most of the time the signature whistle is nothing like its mother's or group members' whistles.

    When the baby dolphin is about a year old, its signature whistle is set. It repeats it often so the other dolphins learn to recognize it.

    Deciphering(破译) dolphin names is just the beginning of figuring out what dolphins communicate about. Do they chat about sharks? Discuss the tides? Maybe they even have a name for people. Someday scientists are to decipher the rest of dolphins' communication.

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