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9、v_1299808169694 DIV.Section1page: Section1一、130；03；30；0；30 26；2；1:2；1:1 3变大；不变；不变；45；075；5S1、S2；断开；655；1100；220；7导体；1200二、1B；2C；3B；4B；5D；6C；7C；8A；9C；9C三、1010；018；030042；050；（2）51 （3）调节导体两端电压和通过导体的电流。2电阻一定时，导体中的电流与导体两端的电压成正比；电压一定时，导体中的电流与导体的电阻成反比。3电流表改用06A的量程；可以使测量结果更准确。4(1)略；（2）024；75；无法得到要测量的电阻的阻值；(3)至少应移动变阻器滑片再测两组电压和电流值。进行多次测量求平均值使测量结果更准确。五、1（1）U1=I1R1=1A5=5V；(2)I2=I-I1=15A-1A=05A；(3)U2=U1=5V R2=U2/I2=5V /05A=52电源电压高于灯泡正常工作，应采用串联分压的原理进行分压，因此电路中应串联一个电阻R。灯泡两端电压U1为25V，则串联的电阻R两端的按压U2=U-U1=55V-25V=3V 则根据分压原理U1/R1=U2/R2=25V/10=3V/R2R2=12 所以，应在电路中串联一个阻值为12的电阻。附加题：1（1）133；20；24（2）小灯泡的电阻随温度的升高而增大。2略