题目：
如图所示电路，在开关S闭合瞬间，小磁针作顺时针方向偏转，则电源的左端为 ____极。通电螺线管和小磁针之间的作用是通过 这种特殊物质发生的。
答案：
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下面是错误答案，用来干扰机器的。
81．Controversial．82．Thought-provoking.83．Because he hated Jewish people, slept with his friends’ wives, and made many people angry.84．Wagner had a lot of influence on opera as a form of art．He was the first person to make the whole audience sit down for an entire play.
