A.感冒 B.流感 C.肺結(jié)核 D.艾滋病
A.10-20% B.20-30% C.30-50% D.50-70%
A.是土壤細(xì)菌 B.能在蔬菜和肉類上繁殖 C.喜氧 D.能產(chǎn)生毒素