阿摩線上測驗
50. In paragraph 3, the phrase “this memory” refers to:
(A) Initial immune response
(B) Vaccine genetic material
(C) Pathogen recognition
(D) Standard immunization schedule
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統計： A(2), B(0), C(13), D(0), E(0) #3840110
統計： A(2), B(0), C(13), D(0), E(0) #3840110
