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１存在的问题a．电学仪器的使用不熟练。电表正、负接线柱接错；不会连接实验电路；不会使用滑动变阻器；不会使用学生电源。b．操作不规范。①电学实验仪器摆放杂乱无章。②不会选择电表的量程及正负接线柱。③电表的读数不规范，不是正对表盘，随意性较大，造成读数误差过大
1 existing problems a. The use of electrical instruments is not skilled. The positive and negative terminals of the meter are connected incorrectly; the experimental circuit will not be connected; the sliding rheostat will not be used; the student power supply will not be used. b. The operation is not standardized. 1 Electrical experiment equipment is arranged in disorder. 2 will not select the meter’s range and positive and negative terminals. 3 The reading of the meter is not standardized, it is not facing the dial, and the randomness is large, causing the reading error to be too large.