[单项选择]In addition to bettering group and individual performance, cooperation ______ the quality of interpersonal relationship. A. ascends B. compels C. enhances D. prefers
第4题: [单项选择]在创建表时,如果定义了一个列的数据类型为VARCHAR2,该列的默认长度是如下的哪一个 A. 1 B. 23 C. 38 D. 250 E. 4000 F. 对于一个VARCHAR2类型的列必须定义其长度 参考答案:F 答案解析:[解析] 这一题是测试对VARCHAR2数据类型列的熟悉程度。根据有关VARCHAR2(size)数据类型的介绍,可知size为该列最多可容纳的字符个数,必须定义,所以可以断定只有选项F是正确的。
第6题: [单项选择]A. About fifty years before the first modern Olympics. B. Fifty years ago. C. When the crawl was developed. D. After the breast stroke was developed. 参考答案:A 答案解析:[听力原文] Being able to swim has always been a valued skill. But competitive swimming is just ov
第7题: [单项选择]肝性脑病前驱期的主要表现是() A. 轻度性格和行为改变 B. 扑翼样震颤 C. 脑电图异常 D. 意识错乱 E. 昏睡但可唤醒 参考答案:A
第8题:[单选题] 使用直读式绝缘电阻检测表,检测全列车的绝缘阻值,应将转换开关旋至( ) 挡。 A.检测 B.R×1 k C.R×10 k D.任意 参考答案:A