干眼症患者的渗透压是A．大于305m Osm/L B．等于300m Osm/L C．

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问题单项选择题

干眼症患者的渗透压是

A．大于305m Osm/L

B．等于300m Osm/L

C．小于300m Osm/L

D．等于312m Osm/L

E．大于312m Osm/L

答案

参考答案：E

选择题

______ is in the classroom. In fact many students were late for school ________me because of the

heavy rain. [ ]

A. No students; except

B. Not every student; besides

C. Not all the students; but

D. No every student; except

单项选择题

骨与关节X线摄片检查常规要求（）

A.双侧对照摄片

B.正侧位片，包括周围软组织及邻近一个关节

C.左、右斜位摄片

D.正、侧位摄片

E.正、侧位摄片，必要时包括双侧对照