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, trej+*voj -yho5s*r;r t8 4klujj e,/a. ux9 rnbibs are cut 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 20,000 kg at the start of one year and the following year it is 24,000 kg, calculate t,uab/rx9 i bn.he 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 biomass at t)g1xtwaib3.g ay6)0lk Sustainable yield = 24,000 − 20,000 = 4000 kg.
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