题目内容

Listen to the conversation and circle the appropriate letter. Which of the following is true

A. The hotel provides free car pickup service.
B. The hotel only provides airport pickup service.
C. The woman asks for an airport pickup service.

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Listen to the conversation and circle the appropriate letter. The woman called to __________ .

A. change the room reservation
B. ask for a car pick up service
C. book a room for a couple

Listen to the conversation and circle the appropriate letter. Which room does the woman reserve

A. Room 301
B. Room 302
C. Room 303

在ACCess已建立了“学生”表，表中有“学号”，“姓名”，“性别”和“入学成绩”等字段。执行如下sQl。命令： SeleCt性别，avg(入学成绩)From学生Group By性别其结果是（）。

A. 计算并显示所有学生的性别和入学成绩的平均值
B. 按性别分组计算并显示性别和入学成绩的平均值
C. 计算并显示所有学生的入学成绩的平均值
D. 按性别分组计算并显示所有学生的入学成绩的平均值

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