阿摩線上測驗
7. Absorbance at______ nm is frequently used to determine the concentration of a protein.
(A) 200
(B) 260
(C) 280
(D)400
(E) 540.
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統計： A(0), B(0), C(2), D(0), E(0) #3191417
統計： A(0), B(0), C(2), D(0), E(0) #3191417
