2. 外语
  3. During the period 1490—1979 the main progress mentioned in this passage was The German, Augustus Siebe, invented the "hard-hat

During the period 1490—1979 the main progress mentioned in this passage was The German, Augustus Siebe, invented the "hard-hat

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问题 During the period 1490—1979 the main progress mentioned in this passage was
The German, Augustus Siebe, invented the "hard-hat suit" which was used
选项 A、for nearly a hundred years.
B、for almost a thousand years.
C、for over a century.
D、for a century or so.
答案A
解析 由第三段中的"Finally，in 1837，he invented the ’hard-hat suit’ which was to be used for nearly a century"可知答案。
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