题目内容

occur        A．accept                 B．access                 C．according            D．accident
C
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Nature is full of color, from rainbows and roses to butterfly wings and peacock tails. Even the fruits and vegetables you eat have different colors: blue blueberries, red strawberries, green broccoli, and orange carrots.
Plant and animals often use color to attract attention. The substances responsible for these colors belong to a class of chemical called antioxidants(抗氧化物). Plants make antioxidant to protect themselves from the sun’s ultraviolet(UV)(紫外线)light.
Ultraviolet light causes chemicals called free radicals(自由基)to form within plant cells. They can destroy parts of plant. Free radicals also have damaging effects on human beings. Some of these effects like wrinkled skin can be seen. The damage is caused by the free radicals attacking cells in our bodies. Certain cancers and heart disease are linked to free radicals.
Our bodies have natural defences for fighting off free radicals. While we are young, our defences are pretty strong. However, they get weaker as we get older. The body’s built-in defences can only go so far without extra help.
The key to fighting free radicals with fruits and vegetables is to mix and match colors. It’s like sunscreen(防晒霜)for the inside of your body. Go for a range of very bright colors. Colorful foods contain hundreds of healthy chemicals not found anywhere else.
Research into how chemicals in blueberries affect the brain’s function in rats suggests that these chemicals may help our own brains work more efficiently.
Don’t just blame the sun. Ultraviolet light isn’t the only source of free radicals. If you breathe polluted air such as smog, automobile exhaust(废气), or wasted gas from a factory, you take in chemicals that also cause such damage. And, the body itself produces free radicals as it processes food.
【小题1】Which of the following not true?

A．Antioxidants are responsible for plant colors
B．Plants use color to attract attention
C．Antioxidants can protect plants from UV light
D．Antioxidants help free radicals to attack plants
【小题2】In which order do the following facts occur?
a Wrinkled skin can be seen
b UV light causes free radicals to form
c Free radicals damage cells in our bodies
d The sun gives out UV light
A．a,b,c,dB．d,b,c,a
C．c,a,d,bD．d,b,a,c
【小题3】We need extra help for fighting off free radicals from fruits and vegetables because ____.
A．our bodies’ defences are not natural
B．we are too young to defend ourselves
C．our defences get weaker as we get older
D．our bodies’ built-in defences can only go away
【小题4】Which of the following can not cause free radicals to form?
A．Colorful foodB．UV light from the sun
C．Polluted airD．The body itself

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。注意：涂卡时，如答题卡上没有E、F、G选项，请按如下方式填涂：选E涂AB；选F涂AC；选G涂AD。

Watching a sporting event with family and friends under the sun is a great experience in summer.   1.   In the United States, heat exposure led to 8,000 deaths between 1979 and 2003. Luckily, a little prevention can go a long way towards making sure of an enjoyable day.

Know the danger

Heat-related illnesses do not require record-breaking temperatures to occur.   2.  The body’s temperature can reach 106 or 107 degrees Fahrenheit on a 90-degree day, creating a potentially deadly situation. Factors such as age, weight or a medical condition can influence people.

Drink plenty of water

  3.   Sweating is your body’s key way to keep cool, so drink water to stay well hydrated(含水的) before you feel thirsty. A cool beer may sound perfect on a hot day, but drink responsibly. Alcohol stops the body’s cooling system and causes you to go to the bathroom frequently.

   4.   

Wear light-colored and loosely fitting clothing, so air can go around your body and help keep you cool. A hat is a must to help you keep cool, since your head contains many blood vessels(血管), and sun block(防晒乳) is always a good idea.

Take action

What should you do if you are suffering from the heat while watching your favorite event?

Get up and go. It is a simple piece of advice, but could make the difference between a quick recovery and something more severe that requires medical attention. The ideal thing is to move yourself from the position you’re in to an area that is a little cooler.  5.  

A. Dress for the occasion

B. Weather-related causes

C. In hot weather, it is essential to stay hydrated.

D. You may miss a little of the action, but it beats missing a lot.

E. But when you add sun exposure to the crowds, the results can be deadly.

F. It is also important to take advantage of services the equipment provides.

G. Temperatures between 80 and 90 degrees Fahrenheit can be dangerous.

 

Nature is full of color, from rainbows and roses to butterfly wings and peacock tails. Even the fruits and vegetables you eat have different colors: blue blueberries, red strawberries, green broccoli, and orange carrots.
Plant and animals often use color to attract attention. The substances responsible for these colors belong to a class of chemical called antioxidants(抗氧化物). Plants make antioxidant to protect themselves from the sun’s ultraviolet(UV)(紫外线)light.
Ultraviolet light causes chemicals called free radicals(自由基)to form within plant cells. They can destroy parts of plant. Free radicals also have damaging effects on human beings. Some of these effects like wrinkled skin can be seen. The damage is caused by the free radicals attacking cells in our bodies. Certain cancers and heart disease are linked to free radicals.
Our bodies have natural defences for fighting off free radicals. While we are young, our defences are pretty strong. However, they get weaker as we get older. The body’s built-in defences can only go so far without extra help.
The key to fighting free radicals with fruits and vegetables is to mix and match colors. It’s like sunscreen(防晒霜)for the inside of your body. Go for a range of very bright colors. Colorful foods contain hundreds of healthy chemicals not found anywhere else.
Research into how chemicals in blueberries affect the brain’s function in rats suggests that these chemicals may help our own brains work more efficiently.
Don’t just blame the sun. Ultraviolet light isn’t the only source of free radicals. If you breathe polluted air such as smog, automobile exhaust(废气), or wasted gas from a factory, you take in chemicals that also cause such damage. And, the body itself produces free radicals as it processes food

  1. 1.

    Which of the following not true?

    1. A.
      Antioxidants are responsible for plant colors
    2. B.
      Plants use color to attract attention
    3. C.
      Antioxidants can protect plants from UV light
    4. D.
      Antioxidants help free radicals to attack plants
  2. 2.

    In which order do the following facts occur?
    a Wrinkled skin can be seen
    b UV light causes free radicals to form
    c Free radicals damage cells in our bodies
    d The sun gives out UV light

    1. A.
      a,b,c,d
    2. B.
      d,b,c,a
    3. C.
      c,a,d,b
    4. D.
      d,b,a,c
  3. 3.

    We need extra help for fighting off free radicals from fruits and vegetables because______.

    1. A.
      our bodies’ defences are not natural
    2. B.
      we are too young to defend ourselves
    3. C.
      our defences get weaker as we get older
    4. D.
      our bodies’ built-in defences can only go away
  4. 4.

    Which of the following can not cause free radicals to form?

    1. A.
      Colorful food
    2. B.
      UV light from the sun
    3. C.
      Polluted air
    4. D.
      The body itself

Department of Homeland Security and CIA produced ________ joint report on Monday warning that ________ next 911 could in fact occur on ________ different date．


  1. A.
    the; a; the
  2. B.
    a; the; a
  3. C.
    /; the; the
  4. D.
    a;/; the

.. Department of Homeland Security and CIA produced ______ joint report on Monday warning that ______ next 911 could in fact occur on ______ different date.

A．the; a; theB．a; the; aC．/; the; theD．a; /; the

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