A. our share of resources B. a biological creature C. a given area D. the maintenance of the ecosystem E. the source of food F.

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问题 A. our share of resources B. a biological creature
C. a given area D. the maintenance of the ecosystem
E. the source of food F. various species
To protect our ecosystems we should not use more than______.

选项

答案A

解析 根据第五段第一句话“To preserve our ecosystems,we should stop using too nmch energy.which happens when we consume more than our share of resources.”可知,为了保护生态系统,我们应该停止使用过多能源。当我们消耗比所拥有资源份额更多的量时,就使用了过多能源。A选项说“我们所拥有的资源份额”符合文意,所以本题选A。
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