IthinkIhadatleastabilliontests,includingoneinwhichtheycutoutapieceofmusclefrommylegandlookedatitunderamicroscope.那个including为什么用ing?还有inwhich这里引导的什么从句句子成分分析下?

Question

I think I had at least a billion tests,including one in which they cut out a piece of muscle from my leg and looked at it under a microscope.
那个including 为什么用ing?还有in which 这里引导的什么从句 句子成分分析下?

Answer 1

including是介词,+宾语one,介宾短语作状语.
in which引导的是定语从句,修饰先行词one.in which相当于in one test,在定语从句中作状语.