题目：
国家标准是对全国经济技术发展有重大意义，必须在全国范围内统一的（）。
A.管理要求
B.工作要求
C.方法要求
D.技术要求
答案：
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参考答案：原子吸收分光光度法
国家标准是对全国经济技术发展有重大意义，必须在全国范围内统一的（）。 A.管理要求
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