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题目内容双击单词支持查询和收藏哦～
The effects of radiation are _____: only after many years, once a chronic disease surfaces, do people realize they had, at some point in their lives, been exposed.
- A.debatable
- B.insidious
- C.obvious
- D.indiscernible
- E.benign
B显示答案
以上解析由 考满分老师提供。
