What is the main idea of the third paragraph?
A.An ecosystem is a community that includes animals, plants, and microscopic bacteria.
B.Local ecosystems depend on each other, so human activity should be cautiously planned.
C.In managing the ecology of an area, we should use natural succession to our advantage.
D.People should remember that they are a part of the ecosystems where they live and work.
第1题
According to this author, after a forest fire, the first living things to reappear would be
A.algae
B.insects
C.mosses and ferns
D.forest animals
请帮忙给出正确答案和分析,谢谢!
第2题
We can infer that the definition of natural succession the author would support would be______.
A.methods of preventing runoff of water
B.the relationship between the environment and living organisms
C.the effect of living things on the environment
D.how environmental changes change life within an ecosystem
请帮忙给出正确答案和分析,谢谢!
第3题
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.
请帮忙给出正确答案和分析,谢谢!
第4题
An ecosystem can most accurately be defined as a______.
A.geographical area
B.community
C.habitat
D.protected environment
请帮忙给出正确答案和分析,谢谢!
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