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
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