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题型:阅读选择 题类:压轴题 难易度:普通

    During the day, you spend a lot of time running, jumping, laughing, eating, and talking. You use up a lot of energy(能量) , and by the end of the day you're tired. Sleeping gives your body a chance to rest.
    But your brain (大脑) and body are not completely at rest during sleeping. While you are sleeping, your mind may think of the things that happened during the day. It keeps the important things in mind as memories(记忆). It also thinks about things you were worrying about, and you may wake up with answers to some of your problems.
    You also grow while you sleep. The thing called "human growth hormone (荷尔蒙)" in the body helps you grow during sleeping. This growth hormone also helps the body to repair itself.
    Sleeping helps your body to conserve energy too. You use up a lot of energy during your daily activities. But when you are sleeping, your body temperature falls, and your "metabolism" (新陈代谢) slows down. You are still using some energy, but much less than when you are awake and active.
    Have you ever stayed up past your bedtime? Did you have difficulty getting up the next morning? Maybe you had problems seeing clearly or you cannot think clearly. That was your body's way of saying, "I need sleep!" A lack ( 缺乏) of sleep can stop your body and mind from working correctly.

(1)、What does "human growth hormone" do while people sleep?

A、It helps people rest well. B、It helps repair the body. C、It helps answer problems. D、It helps slow the body down.
(2)、According to the passage, which of the following tells you need sleep?

A、You use up a lot of energy. B、You enjoy daily activities. C、Your body temperature falls. D、You don't want to get up.
(3)、What does the underlined word "conserve" mean?

A、provide B、move C、save D、spend
(4)、What is this passage mainly about?

A、Sleep is very important. B、The brain needs enough sleep. C、Good ways to sleep well. D、People use energy when sleeping
举一反三
阅读理解

    A computer program that could help catch and ever translates from aliens in outer space has been started by a British scientist.

    If aliens are discovered one day, scientists fear their language may make it possible to understand them. But John Elliott of needs Metropolitan University in Britain has come up with a program that can figure out the structure(结构)of their language. He thinks that's the first step in understanding what they are saying.

    Dr. Elliott's program would compare an alien language to a database (数据库)of 60 different languages in the world to look for a similar structure. He believes that even an alien language will have its own structure. Language has to be structured in a certain way, or it will be harder to use, he told New Scientist magazine.

    Research had shown that it is possible to know if a signal(信号)carries a language rather than a picture or music. Dr. Elliott has gone a step further by finding a way to pick out what might be words and sentences. Because languages have different word orders, Dr. Elliott has set up a library of the sentence structures of 60 human languages.

    If a message is received from outer space, it could be compared against this database. Scientist would then be able to see if ti's similar to any human language, or a mix of the language.

    However, Dr. Elliott also said that in order to translate what the aliens are actually saying, it may still be necessary to have a code book.

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Mobile phones are becoming more and more popular not only with adults but also with students.However,they have also become a problem for middle schools in the last few years.Some children get mobile phones as Christmas or birthday gifts,and more of them ask their parents to buy for them.

Many students like mobile phones because they are so useful and enable them to do a lot of things.Some parents feel it convenient because they can get in touch with(联系)their children.Some teachers think using mobile phones is a distraction (分心的事) to students during school hours and that mobile phones also give them much trouble in their classrooms.Sometimes students send phone messages to cheat(作弊) during exams.A new study says that some teenagers even hurt their fingers because of the over﹣use of mobile phones.They keep using mobile phones for more than ten hours a day.

Many teachers suggest that students should not have phones at school,but if there is a good reason they can leave their phones at the school office.Many people think they understand why parents want their children to have mobile phones,but they agree that schools should let students know when they can use them.In school,they shouldn't be allowed to take their phones to the classrooms.Besides,strict rules about using phones at school should be made.

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