Compared with ordinary coal, new, ’clean’ coals may generate powerA、more cleanly

游客2025-02-17 38

问题 Compared with ordinary coal, new, ’clean’ coals may generate power

选项 A、more cleanly and more efficiently.
B、more cleanly but less efficiently.
C、more cleanly but at higher cost.
D、more cleanly but much more slowly.

答案 A // more cleanly and more efficiently

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Comparedwithordinarycoal,new,’clean’coalsmaygeneratepowerA、morecleanly