题型:问答题 简答题 Zhanglin was lost in computer games during his last year in high school, otherwise he_______ a student at Beijing University. A.had beenB.can beC.has beenD.would have been 查看答案
题型:问答题 简答题 质量保证体系是为使人们确信某产品或某项目服务能满足给定的质量要求所必需的全部有计划有系统的活动。质量保证体系是企业内部的一种管理手段。在合同环境里,质量保证体系是施工单位取得建设单位信任的手段。企业质量管理体系获准认证的有效期为( )年。A.一B.二C.三D.四 查看答案