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【正文】 was in evershorter supply, yet itremained tremendously important. ■【c】it served as the primary source of heat for allhomes and industries and as a basic raw material. ■【d】processed wood (charcoal) was thefuel that was mixed with iron ore in the blast furnace to produce pig iron (raw iron). the ironindustry’s appetite for wood was enormous, and by 1740 the british iron industry wasstagnating. vast forests enabled russia to bee the world’s leading producer of iron, much ofwhich was exported to britain. but russia’s potential for growth was limited too, and in a fewdecades russia would reach the barrier of inadequate energy that was already holdingengland back.14. directions: an introductory sentence for a brief summary of the passage of thepassage is provided below. plete the summary by selecting the three answerchoices that express the most important ideas in the passage. some answer choicesdo not belong in the summary because they express ideas that are not presented inthe passage or are minor ideas in the passage. this questions is worth 2 points.by the eighteenth century, britain was experiencing a severe shortage of energy.development of blast furnaces for the manufacture of pig iron made the britain lessdependent on wood.the medieval period, both russia and britain began to look for alternative sources ofenergy, such as steam power, in order to maintain the growth of their iron industries.inventors designed the first steam engines in order to overe the disadvantages ofrelying on horses to power the pumps used in mining coal.watt was able to improve upon the efficiency of the steam engine and make it usefulto several industries.puddling furnace increased the availability of charcoal to a variety of industries fromcotton to iron production.power increased coal production, which in turn allowed extraordinary growth of theiron industry and the british economy.s(content_relate)?！?017年托福閱讀試題及答案】相關(guān)文章：1.托福試題練習(xí)精選閱讀題及答案2.托?？荚囬喿x試題及答案20173.2016最新托福考試閱讀試題及答案4.2016年托?？荚囬喿x試題及答案5.2016年托福（toefl）考試閱讀模擬試題及答案6.語文閱讀試題及答案7.托福閱讀考試真題及答案8.托福語法試題練習(xí)及答案2017
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