2. 外语
  3. Although scientific progress leads to constant revision of ideas, one observation that has remained________over the years is tha

Although scientific progress leads to constant revision of ideas, one observation that has remained________over the years is tha

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问题 Although scientific progress leads to constant revision of ideas, one observation that has remained________over the years is that there are a lot of insects in the world: some 950,000 species have been identified.
A. robust
B. significant
C. strong
D. perplexing
E. confounding
F. obscure
选项
答案A,C
解析 两句话的逻辑连接词为although，引导让步转折，让步的部分与转折的部分取反。虽然科学的进步导致观点的不断修改，但是有一个观点多年来都是________的。空格中要求填入一个形容词，表示某个特定观点的特征。让步的部分说很多观点在不断被修改(constant revision)，即不断变化，转折的部分说某个特定的观点具有不变的特征即可，所以空格中填入表示“不容易改变”的同义词组，所以选A项robust，C项strong(强有力的)。
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