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【单选题】
我国国家标准中鲜肉中的挥发性盐基氮限量为( )(mg/100g)。A.
5
B.
10
C.
15
D.
20
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举一反三
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【简答题】神经一肌肉接头处的化学递质是（ ）
【单选题】According to this passage, various types of packaging come into existence to ______.
A.
meet the needs of consumers
B.
suit all kinds of products
C.
enhance the market position of products
D.
introduce new products
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