A. maintained B. held C. observed D. implemented 参考答案:A 答案解析:[题解] 单词maintain:坚持;保持;维持;主张。单词observe:觉察到;注意到;庆祝;评论;遵守(习俗,法律)。单词implement:实现;使生效;执行(命令,协议,方案,判决)。
第22题: [单项选择]integration______is the process of verifying that the components of a system work together as described in the program design and system design specifications A. trying B. checking C. testing D. coding 参考答案:C