Basic Education; Construction way; Result standard.

基础教育；建设方式；成效标准。

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Result Standard addition test results suggests that the recoveries of chemical additive residues were 89%-95% with relative standard less than 2%.

结果：加标回收试验结果表明，残留化学助剂加标回收率为89～95%，相对标准偏差均小于2%；

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Result Standard addition test results suggests that the recoveries of chemical additive residues were 89%-95% with relative standard less than 2%.

结果：加标回收试验结果表明，残留化学助剂加标回收率为89～95%，相对标准偏差均小于2%；

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