第23题: [单项选择]Questions 23 to 25 are based on the conversation you have just heard. A. Until the end of November. B. From the beginning of April to the end of September. C. From the 1st October until the 10th December. D. From the 11th December until the 31st January. 参考答案:D 答案解析:[听力原文] When is the peak season
第27题: [单项选择]SQL的SELECT语句中,“HAVING<条件表达式>”用来筛选满足条件的( )。 A. 列 B. 行 C. 关系 D. 分组 参考答案:D 答案解析:[解析] SELECT的命令格式看起来似乎非常复杂,实际上只要理解了命令中各个短语的含义,SQL SELECT还是很容易掌握的,其中主要短语的含义如下:SELECT说明要查询的数据;FROM说明要查询