A.封面B.封底C.書脊D.書芯
A.上臟B.糊版C.掉版D.網(wǎng)點(diǎn)增大
A.調(diào)幅加網(wǎng)B.調(diào)頻加網(wǎng)C.混合加網(wǎng)D.隨機(jī)加網(wǎng)
