----What do you know the _____ of are the pig influenza in humans?
---- usually similar to regular human seasonal influenza .
A.symptoms | B.sympathy | C.symbol | D.symptom |
相关知识点
推荐套卷
----What do you know the _____ of are the pig influenza in humans?
---- usually similar to regular human seasonal influenza .
A.symptoms | B.sympathy | C.symbol | D.symptom |