阿哈罗诺夫—玻姆（A—B）效应的存在表明了B具有可观测的物理效应
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电磁波在波导管内传播时，其电磁波可以是横电波，也可以是横磁波
A. 对
B. 错
推迟势的重要意义在于它反映了电磁作用具有一定的传播速度
A. 对
B. 错
NO[音频]
A. Manager and assistant.
B. Consultant and client.
C. Director and actress.
D. Presenter and guest.
NO
A. He is a marriage counselor.
B. He is the woman’s family doctor.
C. He is one of the couple’s good friends.
D. He is an expert on interpersonal relations.
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