Theforemostr easonwhytheegg-basedmethodisdefectiveliesin_____.
[A]thecomplexprocessofvaccineproduction
[B]itspotentialthreattohumanbeing
[C]thelowsurvivalratefornewfluvaccines
[D]itscontr ibutiontothefluvaccineshortage
正确答案:C
Theforemostr easonwhytheegg-basedmethodisdefectiveliesin_____.
[A]thecomplexprocessofvaccineproduction
[B]itspotentialthreattohumanbeing
[C]thelowsurvivalratefornewfluvaccines
[D]itscontr ibutiontothefluvaccineshortage
正确答案:C