14. The Johns Hopkins team has identified a genetic change, or _____, that can be measured in the blood of colon cancer patients.
(A) antibiotic
(B) biomarker
(C) hormone
(D) vaccine
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統計: A(0), B(13), C(0), D(0), E(0) #3861081
統計: A(0), B(13), C(0), D(0), E(0) #3861081