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[audioFiles]audio_ezfm_0200(20103)[/audioFiles]
[audioFiles]audio_ezfm_0200(20103)[/audioFiles]
游客
2023-11-20
10
管理
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Several Ways To Keep Food Cool
Bacteria can make foods go bad. / This is true of cooked foods as well as fresh foods. / The problem is
especially dangerous when the air around food is warm./High heat kills bacteria./But warm,wet conditions help bacteria grow./
So,the best way to protect food is to keep it in a Cool place./There are several ways to keep food call without the need for electricity./Some refrigerators,for example, are powered by gasoline motors./
There are 1ess costly ways than refrigeration to keep food cool./An ice box is a simple device./It is made mostly of wood./The inside walls are covered with metal./A big piece of ice is placed in the bottom./Millions of homes had ice boxes/until refrigerators became common in the 1940s./
An ice box is kept food cool spoiling for several days/if the outside temperature is not too warn./If the box is kept out of sunlight,the ice Will 1astlonger./
Probably the best method to keep food C001 without electricity/is a device called the evaporative cooler./Evaporation is the natural change of water from liquid to gas/as the water mixes back into the atmosphere./An evaporative cooler is.easy to make,And it does not need tee./
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