2. 专升本
  3. (2001) To raise the labor______of our factory, the engineers, technicians and workers made a lot of suggestions.

(2001) To raise the labor______of our factory, the engineers, technicians and workers made a lot of suggestions.

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问题 (2001) To raise the labor______of our factory, the engineers, technicians and workers made a lot of suggestions.
选项 A、effect
B、efficiency
C、resolution
D、influence
答案B
解析
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