Although one of her fans shouted encouragingly, Li stayed calm and won the most important point in this most important game of her career.
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Some computer mistakes are reversible but some are not and that is when disaster strikes.
就车检测发电机时可将万用表旋钮旋至直流电压档,把红表笔接发电机“电枢”接柱,黑表笔接外壳,让发动机运转在中速以上,12V电气系统的电压标准值应在14V左右,24V电气系统的电压标准值应在28V左右。若测的电压为蓄电池电压,则表明发电机不发电。( )
A. 对
B. 错
就车检测发电机时,当没有万用表和直流电表时,可用汽车灯泡做一试灯来检测。将灯泡两端焊接适当长度的导线,并在其两端接上锷鱼夹。检测前先将发电机“电枢”接柱的导线拆下,再将试灯的一端夹住发电机“电枢”接柱,另一端搭铁,当发动机中速运转时,试灯亮度说明发电机工作正常,否则发电机不发电。()
A. 对
B. 错
交流发电机解体后对定子绕组搭铁检查时,用万用表电阻最大挡检测定子绕组接线端与定子铁芯间的电阻,应为“∞”,否则说明有( )故障。
A. 短路
B. 断路
C. 正常
D. 搭铁