[原创]回答完毕.
<P>第一题 </P>
<P>(B)因为A区灰度高亮度就低了</P>
<P>第2题 (A)</P>
<P><img src="attachments/dvbbs/2006-4/2006481554825652.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2006-4/2006481554825652.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><BR></P>
