新人，请多指教—主语的判别，what作连词

A leading figure in the Scottish enlightenment, Adam Smith's two major books are to democratic  capitalism what Marx's Das Kapital is to socialism.

A. 原句

B. Adam Smith's two major books are to democratic capitalism like

C. Adam Smith's two major books are to democratic capitalism just as

D Adam Smith wrote two major books that are to democratic capitalism similar to

E. Adam Smith wrote two major books that are to democratic capitalism what

答案是E。

请问： 1.为什么主语不是books而是Adam这个人，然后后边还要加个从句解释这么麻烦？

             2. what都可以作连词用啊？what连接主语从句吗？这里是指带谁呢？

Adam Smith 是前面A leading figure 的同位语，所以主语是人..

这题包含了一个句式：

A is to B what C is to D解释为A对于B就如C之于B

So E is correct

多谢前辈！

这么看来，figure只可以理解为“人物角色”，不可以理解为“时代标记（如：图书）”了。