2. 外语
  3. Coal, though ______ than either oil or gas, is still a finite resource.

Coal, though ______ than either oil or gas, is still a finite resource.

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问题 Coal, though ______ than either oil or gas, is still a finite resource.
选项 A、much energy more abundant source
B、the much more energy abundant source
C、a much more abundant energy source
D、energy source more abundant
答案C
解析
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