问答题

以下关于食品冷冻卫生要求，正确的是( )。

以下关于食品冷冻卫生要求，正确的是(  )。
  A．食品冷冻后，应尽量保持新鲜，减少污染
  B．用水或冰制冷时，要保证水和人造冰的卫生质量相当于纯净水的水平
  C．采用天然冰时，更应注意冰箱及其周围的污染情况
  D．防止冷藏食品的干缩

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饭店促销的手段有()。A.广告宣传B.营业推广C.公共关系D.人员推销

饭店促销的手段有()。
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