37. "Viral vectors" are _______.
(A) ways with which viruses genomes are changed
(B) viruses used for carrying genetic material into cells
(C) the paths through which viruses move
(D) immune reactions triggered by viral infection
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統計: A(1), B(4), C(1), D(1), E(0) #3374980
統計: A(1), B(4), C(1), D(1), E(0) #3374980