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]
what is Positive fn(o g4. nzfzv2fdqht w5o3y/ 7eedback )tk*qx8ge8zj8dy:3f d,ox bgloops...;Negative feedback loops...?
A. ...continue after a tipping point.; ...lead to a tipping point.
B. ..increase resilience in a system.; ...reduce resilience in a system.
C. ..are mostly good for the environment. ..;.are mostly bad for the environment.
D. ...destabilise a system.; ...stabilise a system.
参考答案: D
本题详细解析:
Negative feedback loops are generally good in all kinds of systems because thqmx zopo1.4f,xm d.)d ey returqd.dmfo m1x,4opx.z) n a system to the original situation, while positive feedback loops move a system away from the original situation.
Option A is incorrect because positive feedback loops lead to a tipping point, after which a system may end up in a new equilibrium state.
Option B is incorrect because resilience says something about how likely a system is to stay in its current state, something that negative feedback loops promote.
Option C is incorrect because negative feedback loops generally keep the environment in the state that it is in, which is something humans tend to consider to be a good thing.
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