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问题描述：

[单选] 库房内食品应 “隔地离墙” 存放， 与墙壁、地面均保持（）以上。 *
A．A 、5cm B．10cm C．C 、15cm D．D 、20cm
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答案解析：无
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上一篇：以下哪项不属于角膜特点( )（） 下一篇：自制饮品应在（）制作。 *

随机题目

B Work is very important to Americans， and most of them （）their work． Americans put their work first in life． They can learn （）a person is great by talking about his job． So it"s （）to hear people ask each other what they“do” for a living． Today， Americans love to work and always want to get more （）their work． Most Americans want their jobs to be （），wonderful and even challenging（有挑战性的）． Americans work long hours． Most people work about forty hours a week， （）some even work much longer hours-more than sixty hours a week． Most Americans are too busy with their work to （）about their families． In fact， many Americans have （）more pressure（压力）from their work and fewer vacations． Sometimes they have to do （）work at home． In America， some jobs are fun and meaningful， but some are not． To （）better and become happier from boring jobs， many Americans spend time on vacations， hobbies， sports and all kinds of parties when they are free．1．
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以下几项不良项目哪些属于丝网印刷的外观不良项目（）（多选）
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