题目

硝酸生产工艺中，在吸收塔里发生如下反应：3NO2＋H2O2HNO3＋NO  ΔH<0，为提高NO2的转化率，理论上应该采取的措施是A．减压B．增压         C．升温          D．加催化剂  答案：B解析:略  If our car had not ________, we would have been here on time. A. broken out            B. broken into                    C. broken away                D. broken down