练习册

  • 练习册
  • 试题
    59．How does the writer explain birds’ singing? A．By comparing birds with human beings. B．By reporting experiment results. C．By describing birds’ daily life. D．By telling a bird’s story. 答案 56.B 57.D 58.B 59.A Passage 81 Thirteen vehicles lined up last March to race across the Mojave Desert , seeking a million in prize money . To win , they had to finish the 142-mile race in less than 10 hours . Teams and watchers knew there might be no winner at all , because these vehicles were missinge a key part drivers . DARPA , the Defense Advanced Research Projects Agency , organized the race as part of a push to develop robotic vehicles for future battlefields . But the Grand Challenge , as it was called , just proved how difficult it is to get a car to speed across an unfamiliar desert without human guidance . One had its brake lock up in the starting area . Another began by throwing itself onto a wall . Another got tied up by bushes near the road after 1.9 miles . One turned upside down . One took off in entirely the wrong direction and had to be disabled by remote control . One went a little more than a mile and rushed into a fence ; another managed to go for six miles but stuck on a rock . The “winner, if there was any , reached 7.8 miles before it ran into a long , narrow hole , and the front wheels caught on fire . “You get a lot of respect for natural abilities of the living things, says Reinhold Behringer , who helped design two of the car-size vehicles for a company called Sci-Autonics . “Even ants can do all these tasks effortlessly . It’s very hard for us to put these abilities into our machines . The robotic vehicles , though with necessary modern equipment such as advanced computers and GPS guidance , had trouble figuring out fast enough the blocks ahead that a two-year-old human recognizes immediately , Sure , that very young child, who has just only learned to walk , may not think to wipe apple juice off her face , but she already knows that when there’s a cookie in the kitchen she has to climb up the table , and that when she gets to the cookie it will taste good . She is more advanced , even months old , than any machine humans have designed . 【查看更多】

     

    题目列表(包括答案和解析)

    Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing when you are happy. Some scientists believe that birds do sing some of the time just because they are happy. However, they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.
    　Do you know what a “territory” is? A territory is an area that an animal, usually the male, claims (声称) as its own. Only he and his family are welcome there. No other families of the same species are welcome. Your house is your territory where only your family and friends are welcome. If a stranger should enter your territory and threaten you, you might shout. Probably this would be enough to frighten him away. If so, you have actually frightened the stranger away without having to fight him. A bird does the same thing. But he expects an outsider almost any time, especially at nesting (筑巢) season. So he is screaming all the time, whether he can see an outsider or not. This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.
    【小题1】Some scientists believe that most of the time bird’s singing is actually ________.
    A.an expression of happiness      B. a way of warning
    B.an expression of anger          D. a way of greeting
    【小题2】What is a bird’s “territory”?

    A．A place where families of other species are not accepted.
    B．A place where a bird may shout at the top of its voice.
    C．An area for which birds fight against each other.
    D．An area which a bird considers to be its own.
    【小题3】Why do birds keep on singing at nesting season?
    A．Because they want to invite more friends.
    B．Because their singing helps frighten outsiders away.
    C．Because they want to find outsiders around.
    D．Because their singing helps get rid of their fears.
    【小题4】How does the writer explain birds’ singing?
    A．By comparing birds with human beings.B．By reporting experiment results.
    C．By describing birds’ daily life.D．By telling a bird’s story.
    【小题5】What does the underline word “screaming” in paragraph 4 mean?
    A．哭喊声B．令人惊愕的C．尖叫声D．尖叫的

    查看答案和解析>>

    Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing when you are happy.

    Some scientists believe that birds do sing some of the time just because they are happy. However, they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.

    Do you know what a “territory” is? A territory is an area that an animal, usually the male, claims (声称) as its own. Only he and his family are welcome there. No other families of the same species are welcome. Your house is your territory where only your family and friends are welcome. If a stranger should enter your territory and threaten you, you might shout. Probably this would be enough to frighten him away.

    If so, you have actually frightened the stranger away without having to fight him. A bird does the same thing. But he expects an outsider almost any time, especially at nesting (筑巢) season. So he is screaming all the time, whether he can see an outsider or not. This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.

    1.Some scientists believe that most of the time bird’s singing is actually ________.

    A．an expression of happiness                B． a way of warning

    C．an expression of anger                   D． a way of greeting

    2.What is a bird’s “territory”?

    A．A place where families of other species are not accepted.

    B．A place where a bird may shout at the top of its voice.

    C．An area for which birds fight against each other.

    D．An area which a bird considers to be its own.

    3.Why do birds keep on singing at nesting season?

    A．Because they want to invite more friends.

    B．Because their singing helps frighten outsiders away.

    C．Because they want to find outsiders around.

    D．Because their singing helps get rid of their fears.

    4.How does the writer explain birds’ singing?

    A．By comparing birds with human beings.

    B．By reporting experiment results.

    C．By describing birds’ daily life.

    D．By telling a bird’s story.

    5.What does the underline word “screaming” in paragraph 4 mean?

    A．哭喊声           B．令人惊愕的        C．尖叫声           D．尖叫的

     

    查看答案和解析>>

    Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing when you are happy. Some scientists believe that birds do sing some of the time just because they are happy. However, they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.

    　Do you know what a “territory” is? A territory is an area that an animal, usually the male, claims (声称) as its own. Only he and his family are welcome there. No other families of the same species are welcome. Your house is your territory where only your family and friends are welcome. If a stranger should enter your territory and threaten you, you might shout. Probably this would be enough to frighten him away. If so, you have actually frightened the stranger away without having to fight him. A bird does the same thing. But he expects an outsider almost any time, especially at nesting (筑巢) season. So he is screaming all the time, whether he can see an outsider or not. This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.

    1.Some scientists believe that most of the time bird’s singing is actually ________.

    A.an expression of happiness      B. a way of warning

    B.an expression of anger          D. a way of greeting

    2.What is a bird’s “territory”?

    A．A place where families of other species are not accepted.

    B．A place where a bird may shout at the top of its voice.

    C．An area for which birds fight against each other.

    D．An area which a bird considers to be its own.

    3.Why do birds keep on singing at nesting season?

    A．Because they want to invite more friends.

    B．Because their singing helps frighten outsiders away.

    C．Because they want to find outsiders around.

    D．Because their singing helps get rid of their fears.

    4.How does the writer explain birds’ singing?

    A．By comparing birds with human beings.       B．By reporting experiment results.

    C．By describing birds’ daily life.             D．By telling a bird’s story.

    5.What does the underline word “screaming” in paragraph 4 mean?

    A．哭喊声           B．令人惊愕的        C．尖叫声           D．尖叫的

     

    查看答案和解析>>

           Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all ,you probably sing or whistle when you are happy.

           Some scientists believe that birds do sing some of the time just because they are happy. However ,they sing most of the time for a very different reason .Their singing is actually a warning to other birds to stay out of their territory.

           Do you know what a “territory” is? A territory is an area that an animal ,usually the male, claims（声称）as its own .Only he and his family are welcome there .No other families of the same species（物种）are welcome. Your yard and house are your territory where only your family and friends are welcome. If a stranger should enter your territory and threaten you, you might shout. Probably this would be enough to frighten him away.

           If so, you have actually scared the stranger away without having to fight him .A bird does the same thing. But he expects an outsider almost any time ,especially at nesting（筑巢）season. So he is screaming all the time, whether he can see an outsider or not .This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.

           Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs.

           You can see that birds have a language all their own. Most of it has to do with attracting mates and setting up territories.

    56．Some scientists believe that most of the time birds’ singing is actually       .

           A．an expression of happiness                   B．a way of warning

           C．an expression of anger                         D．a way of greeting

    57．What is a bird’s “territory”?

           A．A place where families of other species are not accepted.

           B．A place where a bird may shout at the top of its voice.

           C．An area for which birds fight against each other.

           D．An area which a bird considers to be its own.

    58．Why do birds keep on singing at nesting season?

           A．Because they want to invite more friends.

           B．Because their singing helps frighten outsiders away.

           C．Because they want to find outsiders around.

           D．Because their singing helps get rid of their fears.

    59．How does the writer explain birds’ singing?

           A．By comparing birds with human beings.

           B．By reporting experiment results.

           C．By describing birds’ daily life.

           D．By telling a bird’s story.

    查看答案和解析>>

    Have you ever wondered why birds sing? Maybe you thought that they were just happy．After all, you probably sing or whistle when you are happy．
    Some scientists believe that birds do sing some of the time just because they are happy．However, they sing most of the time for a very different reason．Their singing is actually a warning to other birds to stay out of their territory．
    Do you know what a "territory" is? A territory is an area that an animal, usually the male, claims as its own ．Only he and his family are welcome there ．No other families of the same species are welcome．Your yard and house are your territory where only your family and friends are welcome．If a stranger should enter your territory and threaten you, you might shout．Probably this would be enough to frighten him away．
    If so, you have actually scared the stranger away without having to fight him．A bird does the same thing．But he expects an outsider almost any time, especially at nesting （筑巢） season．So he's screaming （高声尖叫） all the time, whether he can see an outsider or not．This screaming is what we call a bird's song, and it is usually enough to keep an outsider away．
    Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs．You can see that birds have a language of their own．Most of it has something to do with attracting mates and setting up territories．
    【小题1】Some scientists believe that most of the time birds' singing is actually

    A．an expression of happiness
    B．a way of warning
    C．an expression of anger
    D．a language of their own
    【小题2】What is a bird's "territory"?
    A．A place where a bird may shout at the top of its voice．
    B．A place where other bird families are not accepted．
    C．An area for which birds fight against each other．
    D．An area which a bird considers to be its own
    【小题3】Why do birds keep on singing at nesting season?
    A．Because their singing helps frighten outsiders away．
    B．Because their singing helps get rid of their fears．
    C．Because they want to find outsiders around．
    D．Because they want to invite more bird friends．
    【小题4】How does the writer explain birds' singing?
    A．By comparing birds with human beings．B．By reporting experimental results．
    C．By describing birds'daily life．D．By telling a bird's story．

    查看答案和解析>>


    同步练习册答案