2. 外语
  3. Space is often referred to as the final frontier, as the only realm of which humankind has still to gain substantial understandi

Space is often referred to as the final frontier, as the only realm of which humankind has still to gain substantial understandi

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问题 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 is also another vast area about which our knowledge is________.
A. erroneous
B. confusing
C. frustrating
D. rudimentary
E. delusive
F. sketchy
选项
答案D,F
解析 逻辑连接词是yet，转折关系，前后反义对应。前面说太空通常被称为最后的边界(frontier)，是人类唯一还有许多知识需要获取的领域(realm)，yet后面说然而海洋也是人类知识________的地方。换对象取反和yet否定负负得正，空格与still co gain substantial understanding同义重复。海洋跟太空一样，人类关于它也有很多知识需要获得，因此空格应表达知识“匮乏不足”的含义，符合预判的是D项rudimentary(基本的)和F项sketchy(粗略的)。有同学误选B项confusing(让人困惑的)。注意空格主语是knowledge，不能说知识是让人困惑的，只能说知识还很粗略，因此不能选B。
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