Result : The clinical manifestations of chordoma in the neck or skull base were complex . The first symptoms included the mass in the neck rhinocleisis visuognosis fall tinnitus hearing loss and damages of brain nerves .

结果：发生于颅底及颈部的脊索瘤临床表现复杂，首发症状以鼻塞、颈部包块、 视力下降、耳鸣、耳聋及脑神经受损症状为主。

Results Difference was not significant in visuognosis persistence visual-motor reflex time reading number and intellective capacity index between those with protective filters and without filters study groups ( P > 0.05 ) .

结果 操作者 明视持久 度、反应时、阅字数、脑力 工作能力指数 四 项指标在有屏组与无屏组间比较，无统计学意义（P＞0.05）。

Methods Field study was adopted in forty students in a certain hygienic school whose age were 17 to 18 . Observational indicators were as follows : visuognosis persistence visual-motor reflex time reading number error ratio intellective capacity index .

方法对某卫生学校40名17～18岁学生进行，现场研究，观察指标为 明视持久 度、视觉运动反应时、阅字数、错误率、脑力 工作能力指数。

To improve the means of experimental teaching the software system and conventional test method were adopted to measure the visuognosis persistence . Through analysis two different testing methods showed good correlation ( P < 0.01 ) .

为了提高实验教学手段，采用计算机和传统方法进行 明视持久 度 测定， 结果经 统计分析表明，两种方法间有很好的相关性（P<0.01）。

Comparative study of the visuognosis persistence test with the computer and conventional methods in experimental teaching

用计算机与传统方法 测定 明视持久度在实验教学中的对比研究