The World Health Organization gave a warning to the public without any when the virus of H

发布时间：2020-08-16 08:59:15

The World Health Organization gave a warning to the public without any     when the virus of H1N1 hit Mexico in April, 2009. 

A. delay
B. effort
C. schedule
D. consideration

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(答案→)A. delay
B. effort
C. schedule
D. consideration
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