A.青海 B.陜西 C.寧夏 D.甘肅
A.特許經(jīng)營 B.委托經(jīng)營 C.租賃經(jīng)營 D.授權(quán)經(jīng)營
A.MERS B.SARS C.H5N9 D.H7N11