London-is such a wonderful city.It is very large.The Thames River runs (11) the city from west to east. So the city has (12) parts: the South and the North. In the North, there are important buildings, shops, big parks and interesting places. the weather in London is good. In winter it is not very cold and in summer it is not very hot (13) the city is near the sea. People say (14 ) London is a foggy city and it often rains. It is true.Last year,when l (15) in London, Imet one of the (16) fogs in years. You could hardly see your hands in front of your face. Cars and buses moved -along with their lights on.When evening fell, the weather (17 ) even worse. The fog was as thick as milk.(18) the buses and cars stopped. I happened (19 ) . an important meeting on the other side of the town, but it was impossible to find a car. I had to get there (20) .
( )11.
A.about
B.through
C.in
D.along
第1题:
The workers were resting with the machine ________.
A、run
B、running
C、to run
D、runs
第2题:
关系模式CSZ(CITY,ST,ZIP)其属性组上的函数依赖集为F={(CITY,ST)+ZIP, ZIP→CITY},关系模式CSZ的主属性是
A.ZIP
B.CITY,ST,ZIP
C.CITY,ZIP
D.ST,ZIP
第3题:
第4题:
检索有职工的基本工资大于或等于“11”部门中任意一名职工工资的“部门号”,正确的命令是,( )。
A.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ANY; (SELECT 基本工资 FROM 职工 WHERE 部门号="11")
B.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ALL; (SELECT 基本工资 FROM 职工 WHERE 部门号="11")
C.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ANY; (SELECT MAX(基本工资) FROM 职工 WHERE 部门号="11")
D.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ALL; (SELECT MIN(基本工资) FROM 职工 WHERE 部门号="11")
第5题:
关系模式CSZ(CITY,ST,ZIP)其属性组上的函数依赖集为F={(CITY,ST)→ZIP, P→CITY},关系模式CSZ的主属性是
A.ZIP
B.CITY,ST,ZIP
C.CITY,ZIP
D.ST,ZIP
第6题:
有如下的数据表: 部门(部门号, 部门名称) 职工(部门号, 职工号, 姓名, 基本工资) 检索有职工的基本工资大于或等于“11”部门中任意一名职工工资的“部门号”,正确的语句是______。
A.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ANY (SELECT 基本工资 FROM 职工 WHERE 部门号='11')
B.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ALL (SELECT 基本工资 FROM 职工 WHERE 部门号='11')
C.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ANY (SELECT MAX(基本工资) FROM 职工 WHERE 部门号='11')
D.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ALL (SELECT MIN(基本工资) FROM 职工 WHERE 部门号='11')