在制作精密电阻时,为了消除使用过程中由于电流变化而引起的自感现象,采用双线并绕的方法,如图所示.其道理是( ) A . 当电路中的电流变化时,两股导线产生的自感电动势相互抵消 B . 当电路中的电流变化时,两股导线产生的感应电流相互抵消 C . 当电路中的电流变化时,两股导线中原电流的磁通量相互抵消 D . 以上说法都不对7.-What made the boss that angry?-________.( )A.Because the data he worked on were lostB.Because of the loss of the data he worked onC.The data he worked on lostD.That the data he worked on were lost