下列哪些感染类型属医院感染 ( )
A. 内源性医院感染
B. 医院内交叉感染
C. 医院环境感染
D. 医源性感染
E. 野外带菌动物咬伤感染
医院感染的微生态特征有 ( )
A. 主要为机会致病菌
B. 主要为病原菌
C. 常具有耐药性
D. 常发生种类变迁
E. 目前医院感染主要为革兰阳性菌
What can we learn about the origin of COVID-19?
A. Bats have been discovered to be its original cause.
B. Pangolins are now considered the most likely source.
C. It’s identified by comparing sources of various viruses.
D. The virus was found to be genetically similar to those seen in bats.
Why don’t bats suffer from the coronavirus?
A. Their low body temperature protects them.
Bats have a unique immune system.
C. Bats are the only flying mammal to live in groups.
D. Living in caves helps bats fight against viruses.
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