题目内容
躯体运动神经和植物性神经从中枢发出的纤维到达效应器前都要交换神经元。
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与交感神经比较，副交感神经节前纤维较长，节后纤维较短。
产生听觉是耳朵的唯一作用。
两个神经元的任何部分都可能彼此形成突触。
16. What is the purpose of the video library?To help people improve their abilities.17. What problem may people have when using the library for the first time?They may have difficulties understanding .18. What are people advised to do when listening to the video?Write down the they hear and understand.19. What should people do in listening to each conversation?Try to notice the .20. How can people start watching their first video?All they need to do is to click on the link of .
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