2004年高考理综卷(全国卷)22题第(2)问考查的是电表的改装,其中涉及到电表内阻的测量,由于在高三复习中仅接触半偏法测内阻,使得一些学生对于题中所给电路生疏,造成该题失分较严重。笔者根据自己的教学实践,向大家介绍测量电表内阻的 In the 2004 College Entrance Examination (National Volume), 22 questions (2) examined the modification of the electric meter, which involved the measurement of the internal resistance of the meter. As students only contacted the partial resistance method in the third grade review, some students were exposed. The unfamiliarity of the circuit given in the question leads to a serious loss of the title. According to my own teaching practice, the author introduces the internal resistance of the meter.