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Which of the following best sums up activities within an ecosystem?
A.Predator-prey relationships.
B.Interactions among all members.
C.Human-animal interactions.
D.Human relationship with the environment.

A.Predator-prey
B.
B.Interactions
C.
C.Human-animal
D.
D.Human
E.


【参考答案】

B
属信息归纳题。根据生态系统的定义,其内部的活动应概括为所有成员之间的相互影响。
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