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.

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統計： A(16), B(1), C(18), D(53), E(0) #2319620

詳解 (共 1 筆)

#4288727
Both secretion and d...
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