2. 外语
  3. The people for the experiment were chosen completely ______.

The people for the experiment were chosen completely ______.

admin2010-02-19  34
问题 The people for the experiment were chosen completely ______.
选项 A、at length
B、in essence
C、at random
D、in bulk
答案C
解析 confirm证实。句意：新的数据证实臭氧成层的破坏并不限于南半球。ratify批准，许可；assure保证；approve同意，赞成。
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