请分析一下这句话的语法成分？谢谢

Question

1、They’re all groaning about soaring health budgets, the fastest-growing component of which are pharmaceutical costs.
2、The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined.
3.Very few writers on the subject have explored this distinction -- indeed, contradiction -- which goes to the heart of what is wrong with the campaign to put computers in the classroom.
特别是 of which ，of where 和of what 在句中作的成分。

Answer 1

1、They是主语’re all groaning是谓语 about soaring health budgets是状语, the fastest-growing component of which are pharmaceutical costs.是非限制性定语从句
其中 pharmaceutical costs是定从中的主语 are是定从中的系动词 the fastest-growing component 是定从中的表语of which 是定从中的定语 。which是关系代词 指代先行词health budgets
句子意思：他们都抱怨飞涨的健康卫生预算,其中制药成本是其涨速最快的组成部分.
2、The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined.

The complementary coastlines and certain geological features 是主语
that seem to span the ocean 是修饰主语的定语从句
are 是系动词,reminders 是表语
of where the two continents were once joined是介词短语 作定语 修饰reminders
其中 where the two continents were once joined是宾语从句 作 介词of的宾语
句子大意为：互补的海岸线和一些些似乎跨洋的地质特征暗示这两个大陆曾经连在一起.
3.Very few writers 是主语on the subject是定语
have explored是谓语 this distinction 是宾语-- indeed, contradiction是同位语 -- which goes to the heart of what is wrong with the campaign to put computers in the classroom是非限制性定语从句.
其中 of what is wrong with the campaign to put computers in the classroom是介词短语 作定语 修饰the heart
what is wrong with the campaign to put computers in the classroom是宾语从句 作 介词of的宾语
句子意思：研究这一课题的作家很少有人探讨过这种区别、或者可以说是矛盾.这种矛盾触及了倡导使计算机进入教室这一错误的核心.