A is to B what C is to D中的what用作连接代词。它既是前而is的表语，又是后而is的表语。"A is to B what C is to D”常译为“A之于B犹如C之于D"。

A is to B what C is to do是一个习惯表达

A is to B what C is to D.

A leading figure in the Scottish enlightenment 苏格兰启蒙运动的领军任务 figure 有人物的意思 enlightenment 启蒙运动
排掉abc
A is to B what C is to D是一个习惯表达 A之于B犹如C之于D

A is to B what C is to D

“A leading figure in the Scottish Enlightenment是同位语，显然应该是修饰一个人的，而不是“书”

“A leading figure in the Scottish Enlightenment是同位语，显然应该是修饰一个人的，而不是“书”，”

A is to B what C is to D中的what用作连接代词。它既是前而is的表语，又是后而is的表语。"A is to B what C is to D”常译为“A之于B犹如C之于D"。

“A leading figure in the Scottish Enlightenment是同位语，显然应该是修饰一个人的，而不是“书”，”

注意注意注意，figure是人物，不是指标！！！！

就算不知道figure的意思也不能选ABC

A is to B what C is to D是一个习惯表达，A对B来说，就像C对D一样

A is to B what C is to do是一个习惯表达，而不能用A is to B similar to C is to D

A is to B what C is to do是一个习惯表达

A is to B what C is to do是一个习惯表达，而不能用A is to B similar to C is to D

A is to B what C is to do是一个习惯表达，而不能用A is to B similar to C is to D，可以排除(D)，答案为(E)

长难句理解：
A leading figure in the Scottish enlightenment, Adam Smith wrote two major books that are to democratic capitalism what Marx's Das Kapital is to socialism.
作为苏格兰启蒙运动的领军人物，亚当斯密写了两本主要的著作，这两本著作之于民主资本主义正如马克思的《资本论》之于社会主义。

考察：
figure 人物
A is to B what C is to d

A is to B what C is to D是一个习惯表达

A is to B what C is to do是一个习惯表达，而不能用A is to B similar to C is to D