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Is an earthquake dangerous? Yes，of course．But this doesn't mean you can't do anything about it．If you know what to do in an earthquake，you can be safe．

Keep a cool bead．Worry may cause bad decisions．Don't follow others blindly．Think about what you should do．The first several minutes are important．

If you are indoors during an earthquake，quickly move to a safe place in the room such as under a desk or table．Take care of your head．Stay away from windows and things that may fall and hurt you．

If you are in a crowded room and far away from the door，don't rush to it．You will find too many people trying to escape at the same time．Instead，stay under a desk or table．Don't use an elevator．You may not get out of it．

Stay in a safe place until you are sure it's OK to leave．Some aftershocks（余震）may follow an earthquake．These are as dangerous as the earthquake．

If you are in debris（廢墟），try to free your hands and legs．You may make noises by hitting stones．Shouting will make you tired．Try to find some water and food．They are important for you if you aren't found in a short time．Wait patiently for help．

根據短文內容，判斷下列句子正誤。正確的用“A”表示，不正確的用“B”表示。

1．Don't stay near the windows if you are indoors during an earthquake．

2．You may not get out if you use an elevator during an earthquake．

3．Rush to the door together if you are in a crowded room in an earthquake．

4．Keep staying in a safe place until you are sure it's OK to leave after an earthquake．

5．You should keep shouting until others hear you if you are in debris．