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搜题
更多“煤成气（coal derived gas)是天然气。”相关的问题
第2题
A、The requirement for through-ventilation B、The corrosion some types of coal will cause to the ship C、Spontaneous heating D、Generation of methane gas
第6题
A、A.Britain has used up almost all coal deposits B、B.the demand for British coal has declined C、C.petroleum,water power,and electric power are replacing coal for many purposes D、D.the old British mines are narrow and deep,making it difficult to sue machines fro mining.
