题目

含有a mol FeBr2的溶液中，通入x mol Cl2。下列各项为通Cl2过程中，溶液内发生反应的离子方程式，其中不正确的是                                          ( ) A．x＝0.4a,2Fe2＋＋Cl2===2Fe3＋＋2Cl－ B．x＝0.6a,2Br－＋Cl2===Br2＋2Cl－ C．x＝a,2Fe2＋＋2Br－＋2Cl2===Br2＋2Fe3＋＋4Cl－ D．x＝1.5a,2Fe2＋＋4Br－＋3Cl2===2Br2＋2Fe3＋＋6Cl－With the ______word “ PM2.5” constantly appearing in _____media reports, people pay greater attention to it and seek health tips for smoggy days.A. the; / B. the; theC. a; the D. a; /