A ferromagnetic material, which is hard to magnetize and demagnetize, could be used as a computer memory material.

How can we classify the materials based on the susceptibility? A: Ferromagnetic & Ferrimagnetic magnetic materials B: Paramagnetic materials C: Antiferrimanetic materials D: Diamagnetic materials

A small piece of ferromagnetic media (the relative permeability is much greater than 1) is placed in a vacuum uniform magnetic field. Compared with the surrounding magnetic field, the magnetic strength in the media will ________, the magnetic field strength will __________. A: increase; increase B: increase; decrease C: decrease; decrease D: decrease; increase

Regarding the magnetism of the complex, the following statement is<br/>incorrect: ( ). A: The magnetism of complexes is one of the important properties of<br/>complexes B: If all substances are placed separately in a magnetic field, they can<br/>be divided into two groups according to their influence by the<br/>magnetic field: diamagnetic, paramagnetic, and ferromagnetic C: Ferromagnetism is a substance, which is strongly attracted by a<br/>magnetic field D: Most of substances are paramagnetic