1.The moon-landing is mentioned in the first paragraph to illustrate_____.
[A] technology cannot solve all of our human problems
[B] progress in vaccine research for influenza has lagged behind
[C] great achievements have been made by men in exploring the unknown
[D] the development of vaccine production methods can not be stopped
2.What step is essential to the traditional production of flu vaccine?
[A] Manufacturers implant the vaccine into ordered chicken eggs.
[B] Scientists identify the exact strain soon after a flu pandemic starts.
[C] Public health measures are taken as an important pandemic-fighting tool.
[D] Viruses are deadened and made clean before being put into vaccine use.
3.The foremost reason why the egg-based method is defective lies in_____.
[A] the complex process of vaccine production [B] its potential threat to human being
[C] the low survival rate for new flu vaccines [D] its contribution to the flu vaccine shortage
4.Which of the following is true according to the passage?
[A] Flu vaccines now mainly use egg-based technology.
[B] A bird influenza has once circulated among humans.
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