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题目内容双击单词支持查询和收藏哦～
The _____________ of criteria for determining what is meant by "balance" and whether it is beneficial makes it difficult to evaluate claims that probiotics promote a healthy balance of microorganisms in the body.
- A.diversity
- B.vagueness
- C.stringency
- D.paucity
- E.dearth
- F.rigor
D,E显示答案
以上解析由 考满分老师提供。
