A.脈動(dòng)磁場(chǎng) B.靜止磁場(chǎng) C.圓形旋轉(zhuǎn)磁場(chǎng) D.無(wú)磁場(chǎng)
A.OR0.00 B.LDNOT0.00 C.AND0.00 D.LD0.00
A.2個(gè) B.3個(gè) C.4個(gè) D.6個(gè)