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问题 单项选择题

将一张软盘设置写保护后，则对于该软盘，下面说法不正确的是（）。

A.可以将盘上ASCII码文件的内容打印出来

B.可以删除盘上的文件

C.可以显示盘上的文件目录

D.可以在显示器上显示ASCII码文件的内容

答案

参考答案：B

完形填空

请用适当的词完成下面这篇短文，并把所缺单词填写在答题卡指定的位置上。每个空只能填写一个形式正确、意义相符的单词。

It was a fine day last Sunday．John went to a supermarket to do some    小题1:  ．Because it’s a little far away from his home, he   小题2:   his car there．It was difficult for him to find a place to park his car．At last he found one at the corner between two buildings．After parking his car he went into the supermarket to     小题3:  the things he needed．Twenty minutes    小题4:  , he finished shopping and took the things slowly back to the car park．Suddenly he     小题5:   two young men trying hard to open the door of his car．They were both wearing black     小题6:   ．John knew they were the car thieves． But he was    小题7:   and didn’t know what to do．He thought for a moment．Then he got an   小题8: ．He went up to them and shouted loudly: “Can I help you? I think you lost your keys． You can use    小题9:  ．” “Can your keys open this door? Why?” “Yes, because it’s my car．” When the two men heard this, they ran away as    小题10:    as they could． In this way, he stopped the thieves from stealing his car．How clever John was!

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单项选择题

第(31)到(35)题中使用的3个数据表：“学生”表、“课程”表和“成绩”表的结构如下：
“学生”表：学号C(8)，姓名C(8)，性别C(2)，系名(10)，出生日期D
“课程”表：课程编号C(4)，课程名称C(12)，开课系名C(10)
“成绩”表：学号C(8)，课程编号C(4)，成绩Ⅰ

检索每门课程的总分，查询结果中包括课程名和总分，正确的命令是( )。

A．SELECT 课程名称，COUNT (成绩) AS 总分 FROM 课程，成绩；
WHERE 课程．课程编号=成绩．课程编号；
ORDER BY 成绩．课程编号

B．SELECT 课程名称，COUNT(成绩) AS 总分 FROM 课程，成绩；
WHERE 课程．课程编号=成绩．课程编号；
GROUP BY 成绩．课程编号

C．SELECT 课程名称，SUM (成绩) AS 总分FROM 课程，成绩：
WHERE 课程．课程编号=成绩．课程编号；
ORDER BY成绩．课程编号

D．SELECT 课程名称，SUM(成绩) AS 总分FROM 课程，成绩；
WHERE 课程．课程编号=成绩．课程编号；
GROUP BY 成绩．课程编号
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