問題詳情

第 48 題至第 50 題為篇章結構，各題請依文意，從四個選項中選出最合適者，各題答案內容不重複While the appeal of a renewable, home-grown alternative to foreign oil has putethanol front and center in US energy policy discussions, the fuel still facescritics who question its feasibility as a replacement for oil and its impact on theenvironment.Ethanol is an alcohol-based fuel generally made from the starch or sugars incrops like corn, barley, sugar cane, and sugar beets. Almost all of the ethanolproduced in the United States comes from corn, while Brazil-the second-largestproducer of ethanol-uses sugar cane. 48Ethanol use has increased in the past decade. It is now available atnearly1,200 pumps in the States. 49 President Bush called in January 2007 formandatory alternative fuel use to grow to 35 billion gallons by 2017.However, not all analysts think that ethanol is the answer to America＇s energyneeds, despite increased ethanol use. While proponents stress ethanol＇s benefitsfor reducing dependence on fossil fuels, critics say that it takes a significantamount of “old＂ energy resources to produce it. Moreover, to support ethanolproduction, American government provides a 51–cent subsidy to refineries for everygallon of ethanol blended into gasoline. Critics say that government support hasincreased pressure on corn production, while driving up the cost of corn anddiverting an increasing proportion of the corn crop for the fuel.50 In Mexico, the price of tortillas, traditionally made with corn and astaple of the Mexican diet, tripled during the latter half of 2006 ,according to arecent Washington Post article, Another expert also expressed concern that thedemand for sugar cane for ethanol could result in the destruction of thedestruction of the Amazon rainforest.
48.
(A)The money to be made from ethanol is driving farmers to plant more cornand switch lands from other crops.
(B)Ethanol also can be made from materials such as wood and grasses.
(C)The boom in corn demand helps boost the farm economies in many states.
(D)The ripples of rising corn prices have also spread beyond America＇sborders.

參考答案

答案：B
難度：困難0.35
統計：A(8),B(14),C(13),D(4),E(0)

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