题目

 “It’s a secret….” he lowered his voice and whispered     no one could overhear it. A. in case                   B. even if               C. so that           D. as if 答案：C在化学反应2A+B2=2AB中，A 与B2反应的质量关系如图所示，现将6g A和8g B2充分反应，则生成AB的质量是（       ） A．9g                 B．11g             C．12g                D．14g