第5题: [单项选择]In almost all chemical-process plants, heat is ______ by burning of fossil fuels—coal, oil, or natural gas. A. transformed B. conducted C. transferred D. generated 参考答案:D 答案解析:[解析] 本题意为“几乎所有的化工厂里,热能是由燃烧煤、石油或天然气这类矿物燃料而得到的”。D项的“generated产生(光、热、电等)”符合题意。其他三项“transformed转变; condu