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    Give warnings. 【查看更多】

     

    题目列表(包括答案和解析)

    A new study finds that plants communicate with one another to warn of danger.
    We often consider plants as the furniture of the natural world. They don’t move; they don’t make sounds, they don’t seem to act on anything. But as is often the case, plants talk to each other all the time. And the language is chemical.
    Over the years, scientists have reported that different types of plants, from trees to tomatoes, give out chemicals into the air to help neighboring plants. These chemical warnings can spread information about one plant’s disease or infestation(虫害), so other plants can protect themselves. But how plants receive and act on many of the information exactly is still mysterious.
    In this week’s Science Magazine, researchers in Japan offered some explanations. They have found out one chemical message and traced it all the way from beginning to end.
    The scientists looked at tomato plants infested by a common pest(害虫). To start out, they grew plants in two separate plastic spaces connected by a tube(管子). One plant was infested and placed upwind and the other was uninfested and placed downwind. The downwind plants were later exposed(暴露) to the pest. The results showed that plants near sick neighbors before were able to protect themselves better against the pest.
    They found one chemical appeared more often in the exposed plants. The chemical is called HexVic. The scientists discovered where HexVic come from, and put it over healthy plants. Those plants were then able to produce HexVic. Researchers made sure that uninfested plants could fight off bugs and diseases. How do they know when to protect themselves? They are warned first by their friendly plant neighbors.
    It is not a simple story, and it may be happening in more plant species than tomatoes. It may also be happening with more chemical signals that are still unknown to us. In a word, we know that plants not only communicate, but also look out for one another.
    小题1:The underlined “traced” in the fourth paragraph probably means _________ here.
    A．reportedB．followed
    C．doubtedD．developed
    小题2:For scientists, which are the right steps to watch tomato plants infested by a pest?
    ①  Place the infested plant upwind.
    ②  Place the uninfested plant downwind.
    ③  Expose the downwind plants to the pest.
    ④  Grow plants in two separate plastic spaces connected by a tube.
    A．③①②④B．①④③②
    C．④①②③D．④②①③
    小题3:You can put the sentence “The researches also studied leaves from exposed plants and unexposed plants.” At the beginning of
    A．Paragraph 3B．Paragraph 4
    C．Paragraph 5D．Paragraph 6
    小题4:Which of the following can be the best title of this passage?
    A．Communicating Plants and Terrible Diseases
    B．Talking Plants and Friendly Warnings
    C．Protecting Plants and Clear Information
    D．Growing Plants and Mysterious Chemicals

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    If you want to make friends, what should you do?

    Steps:

    ★Try to look on the bright side of things.

    ★Look for groups in your area that do something you are interested in. Maybe you will learn some new skills and meet some people who have many things in common with you.

    Tips(建议，诀窍):

    ★Contact your friends at least once a week by telephone or e-mail, or by visiting them to find out how they are. Remember important things about them such as birthdays and weddings(婚礼).

    ★If you have an argument with your friends, say sorry first.

    ★Remember never to leave old friends just because you have made some new ones.

    ★Listen to others carefully. It’s better to be a good listener.

    ★Be different. Don’t try to change others through your own ideas.

    Warnings:

    ★Never ask or give away(泄密) a friend’s secret.

    ★Don’t be afraid to stand up for what is right.

    ★You’d better not give your ID number, phone number or your home address to people that you have just made friends with.

    根据短文内容，从题中所给的A、B、C、D四个选项中，选择最佳答案。（10分）

    1.Why is it good to look for groups in your area?

    A. Because it isn’t far.?????????????

    B. Because it is a rule in your area.

    C. Because you can make some money.

    D. Because it’s a good chance to meet people who have the same interests.

    2.The underlined word “contact” means “ ______ ”.

    A.联系????????????? B.关系????????????? C.关联????????????? ????????????? D.联合

    3.If you are somebody’s good friend, you should ______ .

    ①try to know his or her secrets?????????????

    ②support him or her when he or she is right

    ③keep in touch with them often??

    ④try to change her or him with your own ideas

    A.①②????????????? B.②③????????????? C.②④????????????? ????????????? D.①④

    4.Which of the following is NOT right according to the passage?

    A. Listen to your friends carefully and keep their secrets.

    B. To keep in touch with your new friends, you’d better tell them your phone number or address.

    C. If you have an argument with your good friend, you’d better say sorry to him or her first.

    D. When you want to make more friends, you should look on the bright side first.

    5.What’s the best title for the passage?

    A. What Is Real Friendship?????????????

    B. Where to Meet New Friends

    C .How to Make Friends

    D. Friends should Help Each Other

     

    查看答案和解析>>

    If you want to make friends, what should you do?
    Steps:
    ★Try to look on the bright side of things.
    ★Look for groups in your area that do something you are interested in. Maybe you will learn some new skills and meet some people who have many things in common with you.
    Tips(建议，诀窍):
    ★Contact your friends at least once a week by telephone or e-mail, or by visiting them to find out how they are. Remember important things about them such as birthdays and weddings(婚礼).
    ★If you have an argument with your friends, say sorry first.
    ★Remember never to leave old friends just because you have made some new ones.
    ★Listen to others carefully. It’s better to be a good listener.
    ★Be different. Don’t try to change others through your own ideas.
    Warnings:
    ★Never ask or give away(泄密) a friend’s secret.
    ★Don’t be afraid to stand up for what is right.
    ★You’d better not give your ID number, phone number or your home address to people that you have just made friends with.
    根据短文内容，从题中所给的A、B、C、D四个选项中，选择最佳答案。（10分）
    【小题1】Why is it good to look for groups in your area?

    A．Because it isn’t far.
    B．Because it is a rule in your area.
    C．Because you can make some money.
    D．Because it’s a good chance to meet people who have the same interests.
    【小题2】The underlined word “contact” means “ ______ ”.
    A．联系B．关系C．关联D．联合
    【小题3】If you are somebody’s good friend, you should ______ .
    ①try to know his or her secrets   
    ②support him or her when he or she is right
    ③keep in touch with them often  
    ④try to change her or him with your own ideas
    A．①②B．②③C．②④D．①④
    【小题4】Which of the following is NOT right according to the passage?
    A．Listen to your friends carefully and keep their secrets.
    B．To keep in touch with your new friends, you’d better tell them your phone number or address.
    C．If you have an argument with your good friend, you’d better say sorry to him or her first.
    D．When you want to make more friends, you should look on the bright side first.
    【小题5】What’s the best title for the passage?
    A．What Is Real Friendship
    B．Where to Meet New Friends
    C．How to Make Friends
    D．Friends should Help Each Other

    查看答案和解析>>

    If you want to make friends, what should you do?
    Steps:
    ★Try to look on the bright side of things.
    ★Look for groups in your area that do something you are interested in. Maybe you will learn some new skills and meet some people who have many things in common with you.
    Tips(建议，诀窍):
    ★Contact your friends at least once a week by telephone or e-mail, or by visiting them to find out how they are. Remember important things about them such as birthdays and weddings(婚礼).
    ★If you have an argument with your friends, say sorry first.
    ★Remember never to leave old friends just because you have made some new ones.
    ★Listen to others carefully. It’s better to be a good listener.
    ★Be different. Don’t try to change others through your own ideas.
    Warnings:
    ★Never ask or give away(泄密) a friend’s secret.
    ★Don’t be afraid to stand up for what is right.
    ★You’d better not give your ID number, phone number or your home address to people that you have just made friends with.
    根据短文内容，从题中所给的A、B、C、D四个选项中，选择最佳答案。（10分）
    小题1:Why is it good to look for groups in your area?
    A．Because it isn’t far.
    B．Because it is a rule in your area.
    C．Because you can make some money.
    D．Because it’s a good chance to meet people who have the same interests.
    小题2:The underlined word “contact” means “ ______ ”.
    A．联系B．关系C．关联D．联合
    小题3:If you are somebody’s good friend, you should ______ .
    ①try to know his or her secrets   
    ②support him or her when he or she is right
    ③keep in touch with them often  
    ④try to change her or him with your own ideas
    A．①②B．②③C．②④D．①④
    小题4:Which of the following is NOT right according to the passage?
    A．Listen to your friends carefully and keep their secrets.
    B．To keep in touch with your new friends, you’d better tell them your phone number or address.
    C．If you have an argument with your good friend, you’d better say sorry to him or her first.
    D．When you want to make more friends, you should look on the bright side first.
    小题5:What’s the best title for the passage?
    A．What Is Real Friendship
    B．Where to Meet New Friends
    C．How to Make Friends
    D．Friends should Help Each Other

    查看答案和解析>>

    阅读理解
           If you want to make friends, what should you do?
           Steps:
          ★ Try to look on the bright side of things.
          ★ look for groups in your area that do something you are interested in. Maybe you will learn some
    new skills and meet some people who have many things in common with you.
          Tips(建议,诀窍) :
          ★ Contact your friends at least once a week by telephone or e-mail, or by visiting them to find out
    how they are.  Remember important things about them such as birthdays and weddings(婚礼).
          ★ If you have an argument with your friends, say sorry first.
          ★ Remember never to leave old friends just because you have made some new ones.
          ★ Listen to others carefully. It's better to be a good listener.
          ★ Be different. Don't try to change others through your own ideas.
           Warnings :
          ★Never ask or give away (泄密) a friend's secret.
          ★Don't be afraid to stand up for what is right.
          ★You'd better not give your ID number, phone number or your home address to people that you
    have just made friends with. 
    1. Why is it good to look for groups in your area? 
    A. Because it isn't far.
    B. Because it is a rule in your area.
    C. Because you can make some money.
    D. Because it's a good chance to meet people who have the same interests.
    2. The underlined word '6contact" means"         " in Chinese.
    A. 练习        
    B. 关联
    C. 关联        
    D. 联合
    3. If you are somebody's good friend, you should         .
    ①try to know his or her secrets
    ②support him or her when he or she is right
    ③keep in touch with them often
    ④try to change her or him with your own ideas
    A. ①②          
    B. ②③
    C. ②④          
    D. ①④
    4. Which of the following is NOT right according to the passage?
    A. Listen to your friends carefully and keep their secrets.
    B. To keep in touch with your new friends, you'd better tell them your phone number or address.
    C. If you have an argument with your good friend, you'd better say sorry to him or her first.
    D. When you want to make more friends, you should look on the bright side first.
    5. What's the best title for the passage?  
    A. What Is Real Friend ship.
    B. Where to Meet New Friends.
    C. How to Make Friends.
    D. Friends Should Help Each Other.

    查看答案和解析>>


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