血源性肺脓肿最常见的病原菌是( )
A．大肠杆菌
B．产气杆菌
C．金黄色葡萄球菌
D．肺炎杆菌
E．草绿色链球菌
参考答案：C
解析： 肺脓肿的病原最常见来自上呼吸道，以吸入为主，其病原菌多为厌氧菌。由膈下脓肿或肝脓肿直接转移发病的肺脓肿，病原菌多见为大肠杆菌、粪链球菌、阿米巴原虫等。由菌血症或败血症所致的血源性播散的肺脓肿，其病原菌多为金黄色葡萄球菌。
| 阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话。 | |
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| A: Susan, how was your weekend? B: 1 A: What did you do? B: I watched a chess (国际象棋) game on Sunday. A: I don't like chess. 2 B: Yes. I enjoyed it a lot. It was an exciting and special game. A: Special? Why? B: 3 A. Two, of course. B: There was only one player in the game. A: One? 4 B: He played against a computer. A: Wow! That sounds interesting. 5 B: The player. He is cleverer than the computer. |