問題詳情

請依下文回答第 33 題至第 36 題        Nobody knows what the global temperature is likely to be in the future, for the climate is a system of almostinfinite complexity. Predicting how much hotter a particular level of carbon dioxide will make the world isimpossible. It’s not just that the precise effect of greenhouse gases on temperature is unclear. It may set offmechanisms that tend to cool things down (clouds which block out sunlight, for instance) or ones that heat theworld further (by melting soils in which greenhouse gases are frozen, for instance). The system could right itselfor spin out of human control.        This uncertainty is central to the difficulty of tackling the problem. Since the costs of climate change areunknown, the benefits of trying to do anything to prevent it are, by definition, unclear. What’s more, if theyaccrue at all, they will do so at some point in the future. So is it really worth using public resources now to avertan uncertain, distant risk, especially when the cash could be spent instead on goods and services that would have ameasurable near-term benefit?        If the risk is big enough, yes. Governments do it all the time. They spend a small slice of tax revenue onkeeping standing armies not because they think their countries are in imminent danger of invasion but because, ifit happened, the consequences would be catastrophic. Individuals do so, too. They spend a little of their incomeson household insurance not because they think their homes are likely to be torched next week but because, if ithappened, the results would be disastrous. Similarly, a growing body of scientific evidence suggests that the riskof a climatic catastrophe is high enough for the world to spend a small proportion of its income trying to preventone from happening. 
33 What is the main idea of this passage?
(A) As technologies advance dramatically, predictions about climate change have become less challenging.
(B) There is an imminent global impact regarding climate change.
(C) The uncertainty surrounding climate change argues for action, not inaction.
(D) There is growing scientific evidence for climate change.

參考答案

答案：C
難度：適中0.676471
統計：A(6),B(11),C(46),D(5),E(0)

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