《变阻器》
变阻器的结构、原理和使用方法
本次执教的九年级(5)班在年级中属于中等程度，但是同学们思维比较活跃，在课堂上很愿意发表自己的见解，向老师提出问题。
參考答案:<rheostat>
rheostat's framework ,principle and method of application
Grade 9,class 5, which I teaches this year is of moderate level in this grade,but the students in this class are very keen and active.They all like telling their real opion and asking me questions.
楼上的
如果9grade5class is in middle degree which I taught this time就问题
首先,...which...is才比较常规
还有 有歧义.
in middle degree which I taught this
