After months of ________, I personally can conclude that it was pretty much an arbitrary policy. ( 章节：1 难度：3)
- A、investment
- B、diameter
- C、transmission
- D、observation
正确答案:D
答案解析:有
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After months of ________, I personally can conclude that it was pretty much an arbitrary policy. ( 章节：1 难度：3)
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