[求助]请教多肉DX

紫气青霞

偶这个虹之玉买来3周之内是下面这个样子，可时间久一点就发现它身上的红色慢慢不见了，新长出来的叶子也是油绿油绿的，怎么回事呢？怎么让他变红啊?<img src="attachments/dvbbs/20031252173895411.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/20031252173895411.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

小王

加光，降温。