Oracle 产品中 CASE 工具的名称是_________。
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在建立索引时,用【 】表明索引文件中每一个索引值只对应惟一的数据记录。
查询是数据浏览、数据重组、【 】、【 】、输入输出等操作的基础。
第一节听下面5段对话。每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 Where are the two speakers
A. In a restaurant.
B. On a farm.
C. At the man’s home.
What must the woman do in order to get to the place she wants to
A. [A] Walk through three yards and turn left at the end.
B. Turn left at the end and walk further to a sign.
C. Turn left at the ticket counter and walk further.