题目

若要使2mol CH4完全和Cl2发生取代反应，且生成的四种氯代物的物质的量相同，则所需Cl2的物质的量为（ ）    A．5mol       B．4mol          C．3mol          D．2mol 答案：AThe newly-discovered evidence led to the criminal _______ to five years in prison.A.to be sentenced B.being sentencedC.sentenced D.be sentenced