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【单选题】
● 给定关系模式 ( ) F U R ， ，其中U 为关系R属性集，F 是U 上的一组函数依赖， 若 Y X → ， （42） 是错误的，因为该函数依赖不蕴涵在F中。 （42）A.
Z Y → 成立，则 Z X →
B.
Z X → 成立，则 YZ X →
C.
U Z ? 成立，则 YZ X →
D.
Z WY → 成立，则 Z XW →
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【简答题】Where can visitors buy a cup of tea?
【单选题】. My parents always help _________ with housework, and we four children always help _________ with our homework.
A.
one another, each other
B.
one another, one another
C.
each other, one another
D.
each other, each other
【单选题】A customer has a new p5-550 running AIX 5.2 that is SAN-attached to a FAStT900. They have encountered hangs lasting over a minute on their new system during application load testing. They called the...
A.
Are there any errors in the error log？ Do they indicate any hardware or software errors？
B.
Has performance data been collected？ What do the results show in terms of I/O statistics？
C.
Has performance data been collected？ What do the results show in terms of CPU utilization？
D.
What type of SAN switch is the customer using？ What are the microcode levels on the switch？
【简答题】根据句意和音标提示写单词。 1. Sun Haiping is Liu Xia ng's ___________/ k?ut /. 2. My parents alw ays ___________/ / me when I haven't got good marks. 3. Liu Xiang broke the world ___________/'rek :d / with a time ...
【单选题】从下列各题的A、B、C三个选项中选出一个最佳选项填入空白处: 17. My parents always ask me _____ hard.
A.
study
B.
studying
C.
to study
【单选题】Where can the visitors learn about the subjects for new students?
A.
in the school hall
B.
in the science labs
C.
in the classrooms
【单选题】【 2014· 天津卷】 9. My parents always _______ great importance to my getting a good education.
A.
have
B.
attach
C.
accept
D.
pay
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