问题描述：
[单选]
关于工艺卫生的说法正确的是（）
A．无尘服两个月清洗一次
B．皮带一个班清洁一次
C．台面纸一个班转动一次
D．带手套可直接接触硅片正面
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上一篇：下面关于导致印刷偏移的原因哪个不正确（）
下一篇：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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