流行性出血性结膜炎传染途径为（）
A.呼吸道感染
B.消化道感染
C.接触传染
D.血液传染
E.空气传染
参考答案：C
He ______ trees in his garden just now. [ ]
A. was seen planting
B. was seen plant
C. is seen to plant
D. has been seen to plant
鼻腔活检的禁忌证是（）
A.高血压患者
B.鼻咽纤维血管瘤
C.疑似鼻咽恶性肿瘤者
D.严重鼻中隔偏曲者
E.鼻腔有急性炎症时
