問題詳情

三、閱讀測驗Weather seems to be the most important factor dictating the severity of forest fires.Hot, dry weather lowers the moisture content of fuel. Once a fire has started, wind wouldbecome influential concerning oxygen supply and the rate of spread. Other importantfactors include forest types and forest conditions. For example, fire is more likely to occurin conifers than in hardwoods; slash-covered or brushy areas are especially hazardousbecause the rate at which combustion consumes fuel is related to fuelvolume or surfacearea.Some fires are caused by lightening; others are caused by people. Those caused bypeople may be accidental or intentional. Regional differences exist regarding the causes offire. For example, fires in Rocky Mountains present a different picture from the fires in theSouth. 70 percent of the fires in the former area are caused by lightening, whereasintentional fires take up to 40 percent in the later.
36. What is the main topic of the passage?
(A) How to reduce the chance of forest fires
(B) Ways to differentiate types of forest fires
(C) Discuss the conditions of forest fires
(D) How to utilize weather information to predict the possibility of forest fires

參考答案

答案：C
難度：適中0.568434
統計：A(38),B(205),C(461),D(81),E(0)

內容推薦

內容推薦