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【判断题】
食品卫生“五四”制中环境“四定”的内容是:定人、定物、定时间、定质量划片分工,包干负责。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】---- Would you like to go travelling with me to New York, Benjamin? ---- Sorry, I’m busy, for the final examination is coming. So I ____________ hard throughout the next several weeks.
A.
have worked
B.
have been working
C.
work
D.
will be working
【简答题】__________ [A] maintenance [B] protection [C] care [D] attention
【简答题】A．Pottery and car maintenance. B．Car maintenance and Spanish conversation. C．Folk guitar and Spanish conversation D．Spanish conversation and keep-fit.
【简答题】[A] management [B] maintenance [C] conservation [D] protection
【简答题】砷盐的检查中导气管中填充的醋酸铅棉花起什么作用?
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