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 s(bd rq(mm 2/t 3pa4czcu5zg9tz q1 xc 2ng:+qyxt in rotation in different sections of the area depending on the type of wood and their growth rate. If the biomass of the woods is 20,00xnz1+x tqg9 y: 2qc5zg0 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 = (totaj 54 xyr(1:prd-vvcq hl biomass at t+1)− (total biomass at t)
Sustainable yield = 24,000 − 20,000 = 4000 kg.
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