本题目来源于试卷: IB ESS Unit 1 Foundations of ESS，类别为 IB环境系统与社会
[单选题]
In a small wooded area, trees are cutwhs(dulsn26go b pl9m :3(xg6 in rotation in different sections of the -qu+a lhnbx) /area depending on the type of woodu) /ab -xnl+hq and their growth rate. If the biomass of the woods is 20,000 kg at the start of one year and the following year it is 24,000 kg, calculate the sustainable yield.
A. 20,000 k g
B. 24,000 k g
C. 4,000 k g
D. 2,000 k g
参考答案: C
本题详细解析:
Sustainable yield = (total biomass at t+1)− (total biomsmb1x+/jnji78m v -bgass at t)
Sustainable yield = 24,000 − 20,000 = 4000 kg.
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