A.數(shù)據(jù)塊長(zhǎng)度(低) B.數(shù)據(jù)塊索引號(hào) C.數(shù)據(jù)塊類型 D.數(shù)據(jù)塊長(zhǎng)度(高)
A.1 B.2 C.3 D.4
A.0 B.128 C.64 D.255