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【简答题】

TASK 4
Directions: The following is a menu of a mobile phone. After reading it, you are required to find the items equivalent to(与……等同)those given in Chinese in the table below. Then you should, the corresponding letters in the brackets on the Answer Sheet, numbered from 51 to 55.
A—phone book B—tools
C—calculator D—message saving
E—phone setting F—backlight setting
G—key lock H—automatic redial
I—sound volume J—ring type
K—voicemail L—additional functions
M—own number N—alarm
O—new message P—network
Q—delete all Directions:
( )自动重拨 ( )本机号码

题目标签:号码
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参考答案:
参考解析:
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刷刷题刷刷变学霸
举一反三

【多选题】查询至少选修了学生201215122选修的全部课程的学生号码,以下说法正确的有( )

A.
查询学号为x的学生,对所有的课程y,只要201215122学生选修了课程y,则x也选修了y。即不存在学生201215122选修的课程y,学生x没有选
B.
该查询只需要在SC表中进行,因此需要用自身连接,通过别名以示区别
C.
SELECT DISTINCT Sno FROM SC S1 WHERE NOT EXISTS  ( SELECT cno FROM SC S2 WHERE S2.Sno = '201215122 ' AND  cno not in (SELECT cno  FROM SC S3 WHERE S3.Sno=S1.Sno  AND  S3.Cno=S2.Cno)  )
D.
SELECT DISTINCT Sno FROM SC S1 WHERE NOT EXISTS  ( SELECT cno FROM SC S2 WHERE S2.Sno = ' 201215122 ' AND  not EXISTS (SELECT *  FROM SC S3 WHERE S3.Sno=S1.Sno AND  S3.Cno=S2.Cno)  );

【单选题】图中所示号码为

A.
发动机型号
B.
发动机号
C.
车架号
D.
零件号