21.下列哪些是在門診治療的社區型肺炎(outpatient community-acquired pneumonia)最常見的致病原 (1)Streptococcus pneumoniae (2)Klebsiella pneumoniae (3)Mycoplasma pneumoniae (4)Chlamydia pneumoniae (5)Staphylococcus aureus (6)Haemophilus influenzae
(A)(1)+(2)+(5)+(6)
(B)(1)+(3)+(4)+(6)
(C)(2)+(3)+(4)+(5)
(D)(1)+(2)+(4)+(5)
(E)(1)+(4)+(5)+(6)