被动免疫治疗（passive immunotherapy)（名词解释)

免疫治疗（immunotherapy)（名词解释)

主动免疫治疗（active immunotherapy)（名词解释)

人工被动免疫（artificial passive immunization)（名词解释)

Passive smoking can be deadly too.

Passive smoking can be deadly too.

Passive smoking can be【 deadly】 too.A.harmful B.f