题目内容

从人类开展化学固氮之后，自然界中生物的硝化过程和反硝化过程就被迫加快了。 ( )

A. 对
B. 错

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持续性原则要求人类根据生态系统持续性的条件和限制因子，在生态系统可以保持相对稳定的范围内，确定自己的消耗标准，而不是把资源视为获得财富的手段。( )

A. 对
B. 错

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Interview Two What is NOT the difference between the American and the British youth

A. British young people are more radical.
B. They dress differently.
C. More British young people wear bright colors.

论述全球初级生产量分布的特点。