66. Azidothymidine (AZT) is a reverse transcriptase inhibitor that was part of the first class of antiviral drugs developed to treat HIV infection. Which of the following steps does AZT act on during the HIV infection cycle? 
(A) Step A
(B) Step B
(C) Step C
(D) Step D
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統計: A(2), B(14), C(2), D(3), E(0) #3426035
統計: A(2), B(14), C(2), D(3), E(0) #3426035