试题与答案

桑基鱼塘是将低洼稻田挖深作塘,塘内养鱼,塘基上种桑,用桑养蚕,蚕粪养鱼,鱼粪肥塘

题型:选择题

题目:

桑基鱼塘是将低洼稻田挖深作塘,塘内养鱼,塘基上种桑,用桑养蚕,蚕粪养鱼,鱼粪肥塘,塘泥肥田.肥桑,从而获得稻.鱼.蚕三大丰收.这是哪一方面的典型例子(  )

A.维持原有的生态平衡

B.根据人类需要建立新的生态平衡

C.加速生态系统的物质循环

D.加速生态系统的能量循环

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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