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    　　After a long period of studies, scientists are uncovering surprising new findings about dolphins(海豚). They believe that dolphins do “talk” to each other, whistling “names” among themselves and others in their group. They help one another when in trouble, like bats, they use sound waves to “see”.

    　　Dolphins love to mimic(模仿). If we swim on our backs, they do, too. If we dive, they follow. Once a trainer blew a puff of(一阵) cigarette smoke against the window of an observation tank(箱), a young dolphin suddenly swam to its mother, nursed a moment, and spit out a cloud of milk against the glass.

    　　It is even more surprising that that dolphins are able to understand sigh language. One of Herman's dolphins has mastered more than 50 sign words. And they can also mimic the signatures of others. Now scientists are learning how dolphins “speak” to each other.

    　　Dolphins help one another. When birth－giving takes place, female gather to keep off sharks. Later, while the mother looks for food, they take care of the young dolphin, swimming in circle.

    　　Dolphins reach out to us in astonishing ways. What would the world be like without them?

    1．To the best of our knowledge, dolphins are ________.

    [　　]

    A．surprising fish

    B．human man's friends

    C．intelligent mammals

    D．interesting animals

    2．In the second paragraph, “nursed” means ________.

    [　　]

    A．brought the mother something to eat

    B．sucked milk from the mother dolphin

    C．asked to be taken care of

    D．gave some milk to her

    3．What was the dolphin doing when it suddenly swam to its mother? It was ________.

    [　　]

    A．having a little fun

    B．diving into the deep sea

    C．playing with the trainer

    D．copying “smoking”

    4．Which of the following do you think is more reasonable?

    [　　]

    A．We are in the early stage of learning about the animals.

    B．We have little difficulty in understanding dolphins.

    C．Man will be able to talk freely to dolphins in the near future.

    D．Sign language is the only way to make dolphins understand us.

    5．The underline word “they” in the first paragraph refers to ________.

    [　　]

    A．scientists
    B．bats
    C．dolphins
    D．trainers
    答案：C;B;D;A;C
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    科目：高中英语 来源：河南省新乡市2009-2010学年高一上学期期末考试英语试卷 题型：050

    阅读理解

    　　To extinguish(熄)different kinds of fires, several types of fire extinguishers(灭火器)have been invented．They must be ready for immediate use when fire breaks out．Most portable(手提式的)kinds operate for less than a minute, so they are useful only on small fires．The law requires ships, trains, buses and planes to carry extinguishers．

    　　Since fuel, oxygen(氧气)and heat must be present for fire to exist, one or more of these things must be removed or reduced to extinguish a fire．If the heat is reduced by cooling the material below a certain temperature, the fire goes out．Water is the best cooling material because it is low in cost and easy to get．

    　　Another method of extinguishing fire is by cutting off the oxygen．This is usually done by covering the fire with sand, steam or some other things．A blanket(毯子)may be used to cover a small fire．

    　　A third method is called separation, which includes removing the fuel, or material easy to burn, from a fire, so that it can find no fuel．

    　　The method that is used to put out a fire depends on the type of fire．Fires have been divided into three classes．Fires in wood, paper, cloth and the like are called C1ass A fires．These materials usually help keep the fire on．Such fires can be stopped most easily by cooling with water．

    (1)

    If a fire breaks out on a bus, which of the following should be ready there for you to use?

    [　　]

    A．

    Sand

    B．

    Water

    C．

    A blanket

    D．

    An extinguisher

    (2)

    To cover a small piece of burning wood with a basin(盆)in order to stop the fire is aft example of ________．

    [　　]

    A．

    separating the fire

    B．

    reducing the heat

    C．

    removing the fuel

    D．

    cutting off the oxygen

    (3)

    In choosing how to put out a fire, we should first be clear about ________．

    [　　]

    A．

    when it breaks out

    B．

    how it comes about

    C．

    what kind it is

    D．

    where it takes place

    (4)

    What would the writer probably discuss in the next paragraph?

    [　　]

    A．

    Another class of fire．

    B．

    Another type of extinguishers．

    C．

    How fires break out．

    D．

    How fires can be prevented．

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