【单选题】【消耗次数：1】
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<img src=https://huaweicloudobs.ahjxjy.cn/00709C2726C7B242A2722D0C74B938E7.png title=QQ截图20170105211255.png alt=QQ截图20170105211255.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/07A1CC2B4A8BEDC547ADF219C642A305.png title=QQ截图20170105211303.png alt=QQ截图20170105211303.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/B56F99CEE1E3C3E5FFBC7EE1037D4758.png title=QQ截图20170105211311.png alt=QQ截图20170105211311.png/>
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参考答案：
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相关题目
【单选题】
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<img src=https://huaweicloudobs.ahjxjy.cn/5C3CF7722AA35D3C7A4867689282CDB9.png title=QQ截图20170105143221.png alt=QQ截图20170105143221.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/4D2B5BE519A1E9E0F97FAE1569015188.png title=QQ截图20170105143232.png alt=QQ截图20170105143232.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/DE6CFD61F0859E4BD0CC321963B6FE1C.png title=QQ截图20170105143242.png alt=QQ截图20170105143242.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/B8E519D255F410DEC0CBB04218E47B10.png title=QQ截图20170105215205.png alt=QQ截图20170105215205.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/E5EDFF71C1A83E73D1ECFC332B560AC3.png title=QQ截图20170105215228.png alt=QQ截图20170105215228.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/C4AD6AA9862BB41C2128B5C65D32DA70.png title=QQ截图20170105215235.png alt=QQ截图20170105215235.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/90DE00CC1A33B69AE4141216E938286A.png title=QQ截图20170105141858.png alt=QQ截图20170105141858.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/455797CA18792757A35FADFCCF29A217.png title=QQ截图20170105142227.png alt=QQ截图20170105142227.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/FC8491D1E4DB44108822D7DB057CA293.png title=QQ截图20170105142243.png alt=QQ截图20170105142243.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/E7C2FDDABF41B2C2CA5E2EEAB684381C.png title=QQ截图20170105142250.png alt=QQ截图20170105142250.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/ACCC024B36B62798A28EAA4490A2341E.png title=QQ截图20170105142841.png alt=QQ截图20170105142841.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/10BF496722BEDC67D564718AF21D49CB.png title=QQ截图20170105142917.png alt=QQ截图20170105142917.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/878768604797FDC9F36F063B16F063C3.png title=QQ截图20170105211946.png alt=QQ截图20170105211946.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/E46A8483390F2825D1CFB85A2A816801.png title=QQ截图20170105211955.png alt=QQ截图20170105211955.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/799905B41C213907EAFC763464473F1F.png title=QQ截图20170105212001.png alt=QQ截图20170105212001.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/22ABA3EE71503FFC56D1182FA9C1D0E3.png title=QQ截图20170105212008.png alt=QQ截图20170105212008.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/CB7804AC8F89B223AE7187BD4E217E81.png title=QQ截图20170105212015.png alt=QQ截图20170105212015.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/7134306666FC3AFBC19E5F8CABA45B06.png title=QQ截图20170105210927.png alt=QQ截图20170105210927.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/0E7EC41479419C6F3CE4A14F817B9858.png title=QQ截图20170105211022.png alt=QQ截图20170105211022.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/3AFCC58A5AA0AC9522090A9C19D4A76F.png title=QQ截图20170105211029.png alt=QQ截图20170105211029.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/696473C46DEE14EB972205864B0596B8.png title=QQ截图20170105211036.png alt=QQ截图20170105211036.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/733AB926ED161E55E586BF5E43EF75F9.png title=QQ截图20170105211043.png alt=QQ截图20170105211043.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/FA01B4293FFD986B27593B9C7B840E3D.png title=QQ截图20170105163026.png alt=QQ截图20170105163026.png/>
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0.5
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0.6
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0.66
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0.7
【单选题】
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<img src=https://huaweicloudobs.ahjxjy.cn/FF6D0DB8DBA30C68A45DE29ABE93AB33.png title=QQ截图20170105162423.png alt=QQ截图20170105162423.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/98EC6A07C160880103C16BE6F1D75E86.png title=QQ截图20170105162430.png alt=QQ截图20170105162430.png/>
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【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/EAC7F1517AF4CDD2C63116D3CBCE8EE2.png title=QQ截图20170105222541.png alt=QQ截图20170105222541.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/F688398F0AFBA6F46B0B1F940C8BB838.png title=QQ截图20170105222601.png alt=QQ截图20170105222601.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/DDEA614A37E33503D8927FD69D4486A6.png title=QQ截图20170105222609.png alt=QQ截图20170105222609.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/B0D650E0BD48090250F46C8666CC7F71.png title=QQ截图20170105222616.png alt=QQ截图20170105222616.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/A2B32A066BAF2281525EEF77DE0A8967.png title=QQ截图20170105222644.png alt=QQ截图20170105222644.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/7EDC847E33E86807B0E4EC28972B4B81.png title=QQ截图20170105222653.png alt=QQ截图20170105222653.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/E16337BBC730E255CA108E7C272BA06A.png title=QQ截图20170105222700.png alt=QQ截图20170105222700.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/493869BAF8D735EE235E25F13716F4AF.png title=QQ截图20170105222713.png alt=QQ截图20170105222713.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/AAAABAD89B983EF8F2748699F960F61D.png title=QQ截图20170105222720.png alt=QQ截图20170105222720.png/>
随机题目
【简答题】
从关系规范化理论的角度讲，一个只满足1NF的关系可能存在的四方面问题是：数据冗余度大、[填空]、删除异常和更新异常。
【简答题】
关系模式由2NF转化为3NF是消除了[填空]对码的[填空]。
【简答题】
属性X函数决定Y，且X的真子集X也能函数决定Y，则称Y[填空]函数依赖X。
【简答题】
数据库中，每个事务都感觉不到系统中其他事务在并发地执行，这一特性称为事务的[填空]。
【简答题】
TCSEC中规定[填空]级别及以上的系统必须实现审计。
【单选题】
设有关系表S(NO，NAME，AGE)，其中AGE为年龄字段，则表达式AGE NOT BETWEEN 18 AND 24 等价于（ ）
①
AGE=24
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AGE24
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AGE=24
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AGE24