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1. Magnets have magnetism and can attract iron objects.

2. Magnets have magnetic poles, N and S poles, and they exist in pairs.

3. There is a distinction between temporary magnets and permanent magnets: when ferromagnetic materials are magnetized, they are easily lost in magnetism, called temporary magnets. When ferromagnetic materials are magnetized, they are not easily lost in magnetism, and are called permanent magnets.

4. When two magnets approach, the same magnetic pole will push apart, and different magnetic poles will attract.