未分类题
One example of physically induced changes of aquatic habitats is
A.easier
B.
B.more
C.
C.herbicide
D.
D.lack
E.
【参考答案】
D
第三段指出影响两栖动物生存的一个重要因素;物理因素和化学因素诱发了水中栖息地的变化。第六段和第七段则是对诱发......
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