A:唾液中含抗生素,有杀菌作用,属于非特异性免疫
B:唾液中含溶菌酶,有杀菌作用,属于特异性免疫
C:唾液中含溶菌酶,有杀菌作用,属于非特异性免疫
D:唾液中含唾液淀粉酶,有消化病菌的作用,属于特异性免疫
—Excuse me. Is the library open all day?
— . Only from 8 a.m. to 4 p.m.