A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23425400_0_2.png"> B <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23425400_0_3.png"> C <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23425400_0_4.png"> D <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23425400_0_5.png">

A 无旋场 B 散场 C 有旋场 D 以上都不是

A 空气 B 水 C 真空 D 以上都有

A 磁荷密度 B 矢量磁位 C 零 D 磁荷密度与磁导率之比

A －6V B －12V C 6V D 12V

A 电压串联负反馈 B 电压并联负反馈 C 电流串联负反馈 D 电流并联负反馈

A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23425413_0.png"> B <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23425413_0_1.png"> C <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23425413_0_2.png"> D <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23425413_0_3.png">

A A或B中有一个接高电平1 B A或B中有一个接低电平0 C A和B并联使用 D 不能实现

A 或非门 B 异或门 C 与非门 D 同或门

A A B B C C D D