摘要: on average 平均地

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   Fire fighting is a serious matter. Knowing what to do during a fire can save people’s lives. It is important to know the ways you can use and show them to everyone else in the family, such as stairways and emergency exits, but not elevators.(电梯)

   From the lower floors of buildings, to escape from windows is possible. Learn the best way to get out of a window with the least chance of serious injury.

   The second floor window is usually not very high from the ground. An average(平均高度) person, hanging by the fingertips(手指尖) will have a drop of about 6 feet to the ground. It is about the height of an average man. Of course, it is safer to jump a short way down than to stay in a burning building.

    Windows are also useful when you are waiting for help. Be sure to keep the door closed before opening the window. Otherwise, smoke and fire may be drawn into the room. Keep your head low at the window to be sure you get fresh air rather than smoke that may have leaked(泄,漏) into the room.

    On the second or the third floor, the best windows for escape are those that open onto a roof. From the roof a person can drop to the ground more safely. Dropping onto cement (水泥地面) might end in injury. Bushes and trees can help you to have a soft landing.

1. Which of the following should not be used when trying to escape from a fire?

  A. Windows         B. Elevators            C. Fire exits                D. Stairways

2. How far from the ground is the second floor window?

  A. About the height of an average man           B. About 6 feet       

  C. About 12 feet                                          D. Nearly 10 feet

3. When there is a fire, the windows are _______ of escaping a fire.

  A. the only way                                                  B. the best way     

C. safer than any other way                    D. one of the possible ways

4. The writer suggests that ________.

A.      breathing in smoke might be harmful

B.      smoke will enter the room through an open window

C.      fresh air can’t reach the second floor window

D.     to keep your head low will help you to escape a fire

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