Lightning causes more fire damage of forests and property than anything else. More importantly, it kills more people than any ot

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问题    Lightning causes more fire damage of forests and property than anything else. More importantly, it kills more people than any other severe weather event. It is important to know what to do--and what not to do--during a thunderstorm. Here are some important roles to remember:
   Don’t go outdoors.
   Don’t go near open doors or windows, fireplaces, radiators, stoves, metal pipes, sinks, or plug-in electrical appliances.
   Don’t use the telephone, as lightning could strike the wires outside.
   Don’t handle metal objects, such as fishing poles or golf clubs.
   Don’t go into the water or small boats.
   Do stay in an automobile if you are traveling. Cars offer excellent protection.
   Don’t take laundry off the clothesline.
   Do look for shelter if you are outdoors. If there is no shelter, stay away from the highest object in the area. If there are only a few trees nearby, it is best to crouch in the open, away from tile trees at a distance greater than the height of the nearest tree. If you are in an area with many trees, avoid the tallest tree. Look for shorter ones.
   Don’t take shelter near wire fences or clotheslines, exposed sheds, or on a hilltop. If your hair stands on end or your skin tingles (感到刺痛), lightning may be about to strike you. Immediately drop to the ground.
   1) Fire damage of forests and property is mostly caused by  (46)  .
   2) Don’t use the telephone in the thunderstorm because lightning could  (47)   outside.
   3) You’d better stay in an automobile if you are traveling, because cars  (48)  .
   4) If there are only a few trees nearby, you’d better crouch in the  (49)  .
   5) If you feel your hair stand on end or your skin tingle, lightning may be about to strike you and you should  (50)   the ground immediately.


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