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【单选题】
某企业新鲜水补充量400m³/h，循环水量10 000 m³/h，外排废水量300 m³/h，损失量50 m³/h，产品带走量50 m³/h，原料带入水忽略不计，该企业水的循环利用率为（ ）。A.
96.2%
B.
94.2%
C.
90.2%
D.
89.2%
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【单选题】According to the information, what should employees do if they need to have more details?
A.
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B.
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C.
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D.
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【简答题】A/D转换器和D/A 转换器的主要技术参数是转换精度和_______。
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