2. 外语
  3. Though steam engines have now passed the ______ of their usefulness, their heritage remains.

Though steam engines have now passed the ______ of their usefulness, their heritage remains.

admin2013-08-03  66
问题 Though steam engines have now passed the ______ of their usefulness, their heritage remains.
选项 A、prime
B、era
C、epoch
D、date
答案A
解析 prime，全盛时期。如：in the prime of youth．在青春风华正茂时期。本题意为“尽管蒸汽发动机现在已经过了它们的全盛时期，它们的传统仍然保留了下来”。era，时代，年代；epoch，(新)纪元，时期，重要时期；date，日期，日子。
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