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题目内容双击单词支持查询和收藏哦～
Philosophical problems arise when people ask questions that, though very _____ , have certain characteristics in common.
- A.relevant
- B.elementary
- C.abstract
- D.heterogeneous
- E.diverse
- F.controversial
D,E显示答案
以上解析由 考满分老师提供。
