twice as likely,why use it

题目

twice as likely,why use it
smokers are about ____ to get the lung infection and die from it as non-smokers

答案

首先存在as.as的句型表示和.一样
其次be likely to do 意思是可能.
所以原句的意思是：吸烟者得肺部感染并因此死亡的几率比不吸烟者大两倍