5. Due to the constantly evolving nature of influenza viruses, WHO continues to stress the importance of year-round global ______ to detect and monitor emerging or circulating influenza viruses.
(A) trade
(B) market
(C) surveillance
(D) vaccination
(E) war
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統計: A(0), B(0), C(7), D(0), E(0) #3853932
統計: A(0), B(0), C(7), D(0), E(0) #3853932