题目

____ himself with necessary knowledge and skills, Tom went to the job market with much confidence. A. Equipped              B. Equipping       C. Having equipped       D. Being equipped 答案：C 解析: 略在一固定容积的密闭容器中充入2molA和1molB，发生反应2A（g）+B（g）xC（g），达到平衡后，C的体积分数为W%。若维持容器体积和温度不变，按0.6molA、0.3molB、1.4molC为起始物质，达到平衡后，C的体积分数也为W%，则x值为（ ）A．1 B．2 C．3 D．2或3