A.順磁質(zhì)μr>0,抗磁質(zhì)μr<0,鐵磁質(zhì)μr>>1 B.順磁質(zhì)μr>1,抗磁質(zhì)μr=1,鐵磁質(zhì)μr>>1 C.順磁質(zhì)μr>1,抗磁質(zhì)μr<1,鐵磁質(zhì)μr>>1 D.順磁質(zhì)μr<0,抗磁質(zhì)μr<1,鐵磁質(zhì)μr>0