80 從肺炎病人痰液中分離出下列何種病菌,即可確立該菌為致病菌?(A)綠膿桿菌(Pseudomonas aeruginosa)(B)肺結核分枝桿菌(Mycobacterium tuberculosis)(C)嗜血性感冒桿菌(Haemophilus influenzae)(D)草綠色鏈球菌(Viridans streptococci)