2. 专升本
  3. However, at times this balance in nature is ______, resulting in a number of possibly unforeseen effects.

However, at times this balance in nature is ______, resulting in a number of possibly unforeseen effects.

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问题 However, at times this balance in nature is ______, resulting in a number of possibly unforeseen effects.
选项 A、troubled
B、disturbed
C、confused
D、puzzled
答案B
解析
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