英语选择题Enginesaretomachines____hea
Engines are to hines____ hearts are to animals. A.as B.that C.what D.which 请详细说下解题过程，谢谢。
选C 意思是:引擎对于机器就像心脏对于动物一样(重要). sth. be to sth. what sth. be to sth.句型是一个固定的类比句型.