◎ 题干
At times the balance in nature is________, resulting in a number of possibly unforeseen effects.
[     ] 
A. confused  
B. puzzled
C. disturbed  
D. troubled
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“At times the balance in nature is________, resulting in a number of possibly unforeseen effects. [ ] A. confusedB. puzzledC. disturbedD. troubled…”主要考查了你对  【动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。