急性上呼吸道感染如合并细菌感染,以下哪种不常见()
A.肺炎克雷伯杆菌
B.溶血性链球菌
C.流感嗜血杆菌
D.肺炎链球菌
E.葡萄球菌
参考答案:A
The most gifted students do not necessarily perform best in exams. It counts for more to know how to make the most of one’s abilities.
脂质体的膜材主要由()和胆固醇等构成。