奥斯特实验说明____．在两根相互平行且靠近的长直导线中通入相同方向的电流时，它们互相____；通入相反方向的电流时，它们互相____；电流之间的相互作用是通过____发生的．

任务型阅读

    This is Ken. He likes pandas best. ①Because he thinks pandas are smart. Pandas are from China. His friend Tom is different from(与……不同) him. Tom's favorite animals are giraffes because he thinks they are very cute and friendly.

    I like tigers. I think they are beautiful and energetic（充满活力的）. But now the tigers, especially（特别）the Manchurian tigers(东北虎), are in great danger. We must save them.

    We love animals. ②We think people should protect（保护）all the animals.