56. The disease transmission of COVID-19 is mainly by:
(A) air pollutants
(B) blood transmission
(C) fecal oral transmission
(D) direct contact with secretions or droplets.

答案：登入後查看
統計： A(17), B(1), C(18), D(53), E(0) #2319620

詳解 (共 1 筆)

#4288727
Both secretion and droplet have something to do with the saliva that people generate, which is the main cause of COVID-19.
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