阿摩線上測驗
27. When a person becomes infected with HIV, the virus attacks and weakens the ________system.
(A) digestive
(B) circulatory
(C) nervous
(D) immune
(E) cardiovascular
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統計： A(0), B(0), C(0), D(33), E(0) #3081447
統計： A(0), B(0), C(0), D(33), E(0) #3081447
