题目：
根据所需提供信息来确定的原则即是（）.
A.针对性
B.有效性
C.重要性
D.经济性
E.时效性有关检验项目选择的原则
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A
根据所需提供信息来确定的原则即是（）. A.针对性 B.有效性 C.重要性 D.经济
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