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【单选题】
对一项诊断试验作评价时,其阳性预测值和误诊率分别是:
A.
a/(a+d)、b/(c+d)
B.
a/(a+c)、b/(b+d)
C.
a/(a+b)、b/(c+d)
D.
a/(a+b)、b/(b+d)
E.
a/(a+c)、d/(b+d)
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