题目内容

土壤及时满足植物对水、肥、气、热要求的能力,称为土壤肥力。()

A. 正确
B. 错误

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次生演替的方式和趋向是多种多样的。()

A. 正确
B. 错误

有效的捕食可能把猎物种群消灭,然后捕食者也因饥饿而死亡。()

A. 正确
B. 错误

当生物种群数量达到高峰时,由于种群压力增加,种群数量会趋于下降。这是自然对生物种群的调节。()

A. 正确
B. 错误

What's the purpose of the stress management courses that runs by Jane Collard?

A. Help people reduce their stress.
B. Make the trainees realize stress in itself is not harmful.
C. Stress enables people to feel motivated and to perform. effectively.
D. A complete absence of stress can lead to depression.

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