The multimedia demonstration instrument has become an indispensable tool for college teaching.
多媒体演示仪已成为高校教学的必备工具。
The results of simulation test and model test show that the parameters of demonstration instrument are in line with teachers' class operation state.
经过模拟试验和模型测试，结果显示：演示仪参数符合教师课堂操作状态和相合性。
Using electronic components to design circuit, the basic control demonstration instrument is made, and the control phenomena of temperature, magnetism, light and voice are demonstrated.
利用电子元器件设计电路 ，制作了基本控制演示仪 ，演示了最基本的温、磁、光、声控制现象 。
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