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题目内容双击单词支持查询和收藏哦～
Space is often referred to as the final frontier, as the only realm of which humankind has still to gain substantial understanding, yet the ocean realm is another vast area about which our knowledge is _____.
- A.erroneous
- B.confusing
- C.frustrating
- D.rudimentary
- E. delusive
- F.sketchy
D,F显示答案
以上解析由 考满分老师提供。
