Even in this age of conservation, cooking ranges that consume fossil fuels are far more common than those that rely on magnetic resonance, producing heat more efficiently than natural gas.
-
Aproducing heat more efficiently than natural gas
分析该选项
-
Bproducing heat more efficiently than natural gas does
分析该选项
-
Cwhich produce heat more efficiently than natural gas
分析该选项
-
Dwhich produce heat more efficiently than natural gas does
分析该选项
-
Emuch more efficient at producing heat than natural gas
分析该选项
显示答案
正确答案: B