NTSC制的相位失真敏感主要会引起( )。
A．色饱和度失真
B．色调失真
C．对比度失真
D．以上都不对
参考答案：B
_____ such a heavy loss, the businessman didn't have the courage to go on.[ ]
A. Having suffered
B. Suffering
C. To suffer
D. Suffered
"条形码标签"的英文是（）
A.label
B.barlabel
C.barcodeandlabel
D.barcodelabel
