2. 外语
  3. The outer layer of the bark Ainsulating the tree from the Bweather, protects the tree Cfrom animals, and Dforms a barrier agains

The outer layer of the bark Ainsulating the tree from the Bweather, protects the tree Cfrom animals, and Dforms a barrier agains

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问题 The outer layer of the bark Ainsulating the tree from the Bweather, protects the tree Cfrom animals, and Dforms a barrier against fungi.
选项 A、 
B、 
C、 
D、 
答案A
解析 Insulating is not parallel to the other verbs in the list, protects and forms. Correction: insulates.
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