weichengfu:
[图片]500){this.resized=true;this.width=500;this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/76/3076481239370689.gif');}"onmousewheel="returnimgzoom(this);">麻烦看一下这张图,有些地方还不懂,整流滤波以后为什么还是馒头波?