【单选题】What is a key characteristic of a permanent magnet alternator? A. Permanent magnet stator B. Permanent magnet rotor C. Permanent magnet rotor and stator D. The use of a strong NIB magnet

名词翻译：giant magnet

magnet A: 磁性 B: % C: @

_______________every magnet is surrounded by a magnetic field.

Does induction motor require a permanent magnet?

magnet A: 陶瓷，瓷器 B: 磁铁，磁石

superconducting magnet A: 常导磁体 B: 超导磁体

‎_____ magnet in a magnetic field will be subject to _____ force.‎ A: A; a B: The; the C: A; the D: the; /

Attempting to quit smoking can ______a people magnet among social groups.

Many birds, butterflies andcrabsuse the Earth like a giant magnet to find their way. (crabs)