麻疹并发细菌性肺炎最常见病原是()
A.大肠杆菌
B.金黄色葡萄球菌
C.溶血性链球菌
D.嗜血流感杆菌
E.肺炎克雷伯菌
参考答案:B
下列图示,表示6月22日地球上太阳光照情况的是
—What did you see when you came into Simon's room?
—I saw he _____ the Internet. [ ]
A. was searching
B. searched
C. search
D. will search