原帖由 <i>bbscatelcom</i> 于 2014-5-17 23:33:18 发表 <a href="http://www.mscbsc.com/bbs/redirect.php?goto=findpost&pid=4950882&ptid=277502" target="_blank"><img src="http://www.mscbsc.com/bbs/images/common/back.gif" 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(this.src);}" onmousewheel="return imgzoom(this);" alt="" /></a><br />
肯定答案是3啊，E=h*v,频率低，波长越长，穿透能力越强，频率高，波长短，穿透能力弱。电信的800M覆盖较好，穿透力强就是这个原因。