The problem which digital camera of the three is suitable puzzles me
问题描述：
The problem which digital camera of the three is suitable puzzles me
这里的which在从句中充当什么成分?
为什么是用which?
答
which digital camera of the three is suitable 整个结构做the problem的同位语,根据句意“三款数码相机中哪一款适合”先行词用 which