问题
问答题 简答题
光光度计显示屏指针摆动不稳定解决办法?
答案
参考答案:
光电管暗盒内受潮,会造成放大器不稳定,电表指针产生抖动,灵敏度从1挡到3挡变3DJ6F场效应管Rgs性能变坏,阻抗降低,更换新3DJ6F场效应管。合格的状态是各调节旋钮可以正常工作,电表指示稳定。
光光度计显示屏指针摆动不稳定解决办法?
参考答案:
光电管暗盒内受潮,会造成放大器不稳定,电表指针产生抖动,灵敏度从1挡到3挡变3DJ6F场效应管Rgs性能变坏,阻抗降低,更换新3DJ6F场效应管。合格的状态是各调节旋钮可以正常工作,电表指示稳定。
根据表格内容,选择最佳答案。
A. Hangzhou B. Beijing C. Guangxi 小题2:We can go to __________ on the first floor. A. Animal Hall B. Human and Health C Home on earth. 小题3:We mustn’t ___________ in the museum. A. talk B. stop C. smoke 小题4:The museum is open ______________ hours a day. A. 8 B. 10 C. 12 小题5:Which of the following is TRUE? A. We can visit the museum on Mondays. B. We don’t need to pay for the visit to the museum. C. We can take some photos in the museum. |