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【单选题】
现有紫外－可见吸收光谱相互干扰的A和B两组分，它们的最大波长分别为A和B，若用双波长测定A组分的含量，则下面哪一种选择 1和 2的方法是正确的？（）A.
使 1和 2分别等于A和B
B.
选 1等于A，选 2使B组分在2的吸光度和它在1处的吸光度相等
C.
选 1等于A，选 2为A，B两组分吸收峰相交处的波长
D.
选 1等于B，选 2使A组分在 2的吸光度和它在 1处的吸光度相等
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