2. 外语
  3. In almost all chemical-process plants, heat is______by burning of fossil fuels—coal, oil, or natural gas.

In almost all chemical-process plants, heat is______by burning of fossil fuels—coal, oil, or natural gas.

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问题 In almost all chemical-process plants, heat is______by burning of fossil fuels—coal, oil, or natural gas.
选项 A、transformed
B、conducted
C、transferred
D、generated
答案D
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；conducted指导；transferred转移”都不正确。
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