2. 外语
  3. He had a clear ______ of what was wrong with the machine and fixed it in a short time.

He had a clear ______ of what was wrong with the machine and fixed it in a short time.

admin2005-12-10  82
问题 He had a clear ______ of what was wrong with the machine and fixed it in a short time.
选项 A、debris
B、deficiency
C、perception
D、persecution
答案C
解析
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