生物的生态对策有__________和r对策两种。

生物的生态对策有__________和r对策两种。

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在生态系统中,物质周转期是.(  )

在生态系统中,物质周转期是.(  )A.周转率的倒数 B.能效的倒数 C.流入量除以库存容量 D.流出量除以库存容量

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正确答案:(  )[ A ] indeed [ B ] hence [ C ] however   [ D ] ther

正确答案:(  )[ A ] indeed [ B ] hence [ C ] however   [ D ] therefore

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正确答案:(  )[ A ] of [ B ] for [ C ] beyond   [ D ] into

正确答案:(  )[ A ] of [ B ] for [ C ] beyond   [ D ] into

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正确答案:(  )[ A ] process   [ B ] company [ C ] light [ D ] for

正确答案:(  )[ A ] process   [ B ] company [ C ] light [ D ] form

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