Extremely hot weather is common in many parts of the world. Although hot weather just makes most people feel hot,it can cause serious medical problems―even death. Recently,extreme heat was blamed for killing more than one hundred people in India. Experts say heat may be nature's deadliest killer.

  The total heat of a hot day or several hot days can affect health. Several hot days are considered a heat wave. Experts say heat waves often become dangerous when the nighttime temperature does not drop much from the highest daytime temperature. This causes great stress on the human body.

  The most common health problem linked to hot weather is heat stress. The causes of heat stress include wearing heavy clothing,physical work or exercise,hot weather or high humidity (濕度) .

  Untreated heat stress can lead to a more serious problem called heat exhaustion. A person suffering from heat exhaustion loses too much water through perspiration (流汗) .The person becomes dehydrated. Heat exhaustion also can lead to heat stroke if it is not treated. Heat stroke is the most serious disorder linked to hot weather.

  Generally,the body temperature rises to more than forty degrees Celsius. The body stops perspiring. The skin becomes dry and very hot. A person may become unconscious,not knowing what is happening.

  Health experts say adults should drink about two liters of water a day to replace all the water lost in liquid wastes and perspiration.

  In hot weather,drinking cool liquids is best. Cool drinks do more than just replace lost body water. They also help cool us faster than warm liquids do. This is because they take up more heat inside the body and carry it away faster. Yet experts advise against drinking sweet liquids in hot weather. The sugar they contain slows the liquid from getting into the blood system. Doctors also warn against alcoholic drinks. Alcohol speeds the loss of body water through liquid wastes.

  Doctors say actions other than drinking water can protect against the health dangers of heat. Stay out of the sun,if possible. Wear loose,lightweight and lightcolored clothes. Also,rest more often. Physical activity produces body heat.

  Experts say these simple steps can prevent the dangerous health problems linked to heat. They will prevent sickness,help you feel better and may one day even save your life.

(   ) 5. The example in the first paragraph indicates that         .

   A. India is not a suitable place for people to live in

   B. extreme heat can be deadly and fatal

   C. extreme heat is the main cause for death in India

   D. Indian government is to blame for not taking active measures

(   ) 6. Which of the following is NOT the cause of heat stress?

   A. Low humidity.

   B. Hot weather.

   C. Wearing heavy clothing.

   D. Physical exercise.

(   ) 7. What does the underlined word "dehydrated" mean in Paragraph 4?

   A. The body stops perspiring.

   B. The body temperature is high.

   C. The body loses much salt through perspiration.

   D. The body loses large amounts of body water.

(   ) 8. What can we learn from the passage?

   A. We should drink cool liquids and sweet liquids in hot weather.

   B. Drink plenty of water can solve the problem of heat exhaustion.

   C. When the body temperature is over 40 degrees Celsius,a person is sure to die.

   D. Physical activity can help us prevent the dangerous problems linked to heat.

5. B作者以印度酷暑為例，目的是表明極度炎熱的危害。

6. A根據(jù)第3段可知應(yīng)為"high humidity"。

7. D由前一句話A person suffering from ... perspiration可推測Dehydrate指"(人體) 脫水，失水"。

8. B A、C、D三項(xiàng)都不正確。

題目來源：高考英語組合訓(xùn)練（完形填空 +閱讀理解） > 組合訓(xùn)練31-40

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  One of the things teachers dread is to have charge of a class dominated by a large,stupid,bullying boy. David Horsey gives such a young rude truly nightmarish (垂夢般的) proportions in today's cartoon：too large to fit in the room.

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   D. An intelligent but talkative one.

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   A. how to teach a violin in an effective way

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