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【单选题】
一个关系模式r的每一个非主属性,既不传递依赖于码,也不部分依赖于码,则这个关系模式r可以达到第几范式:
A.
1NF
B.
2NF
C.
3NF
D.
4NF
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参考答案：
举一反三
【单选题】--- How much the T-shirt and the bag? --- 30 dollars.
A.
is; It’s          
B.
are; It’s       
C.
are; They’re
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【简答题】Perry lives on avocados and beans. The price of avocados is $10, the price of beans is $5, and his income is $40. Show Perry’s budget line on a graph with avocados on the horizontal axis and beans on ...
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【单选题】—______is the weather in Shanghai? —______windy. [     ]
A.
What ; It’s
B.
How ; It’s
C.
How ; Its
D.
What ; Its
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【单选题】—What’s the date today? —____. [     ]
A.
It’s Sunday
B.
It’s sunny
C.
It’s June 20
D.
It’s going to rain
查看完整题目与答案
【单选题】If the price of bread is zero, a budget line between bread (on the vertical axis) and cheese (on the horizontal axis) would ( )
A.
be vertical.
B.
coincide with the vertical axis.
C.
coincide with the horizontal axis.
D.
be horizontal.
查看完整题目与答案
【简答题】2011年6月27日，甲县烟草专卖局稽查大队市场监管员小张接到电话举报，举报人称，本县城关镇零售户“一康便利店”销售的A品牌卷烟激光喷码模糊不清，怀疑是假烟。小张认为这一线索价值较小，故未做记录，也未向稽查大队负责人汇报。第二天，小张和另一名市场监管员小王来到一康便利店，一康便利店店主康某正在店中。小张、小王经出示证件、表明身份后，依法对该店进行了检查。在对该店柜台内的卷烟进行检查时，小张对康某说...
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【单选题】流线型舵设计呈中间空心并要求的水密的主要目的是( )。
A.
获得浮力减轻舵承压力
B.
节省材料及简化制造工艺
C.
降低造价增加强度
D.
提高水动力性能
查看完整题目与答案
【单选题】Considering a PPF with health care services on the vertical axis and other goods and services on the horizontal axis, the increasing production of health care services in the United States as a result...
A.
a movement upward along the PPF.
B.
an outward shift of the PPF from the vertical axis.
C.
an outward shift of the PPF from the horizontal axis.
D.
a movement downward along the PPF.
查看完整题目与答案
【单选题】左外连接查询使用的关键字是()。
A.
JOIN
B.
CROSS JOIN
C.
RIGHT JOIN
D.
LEFT JOIN
查看完整题目与答案
【单选题】—This is ______ eraser. —______ her eraser.
A.
a; It’s           
B.
an; Its      
C.
an; It’s
查看完整题目与答案
相关题目：
【单选题】--- How much the T-shirt and the bag? --- 30 dollars.
A.
is; It’s          
B.
are; It’s       
C.
are; They’re
查看完整题目与答案
【简答题】Perry lives on avocados and beans. The price of avocados is $10, the price of beans is $5, and his income is $40. Show Perry’s budget line on a graph with avocados on the horizontal axis and beans on ...
查看完整题目与答案
【单选题】—______is the weather in Shanghai? —______windy. [     ]
A.
What ; It’s
B.
How ; It’s
C.
How ; Its
D.
What ; Its
查看完整题目与答案
【单选题】—What’s the date today? —____. [     ]
A.
It’s Sunday
B.
It’s sunny
C.
It’s June 20
D.
It’s going to rain
查看完整题目与答案
【单选题】If the price of bread is zero, a budget line between bread (on the vertical axis) and cheese (on the horizontal axis) would ( )
A.
be vertical.
B.
coincide with the vertical axis.
C.
coincide with the horizontal axis.
D.
be horizontal.
查看完整题目与答案
【简答题】2011年6月27日，甲县烟草专卖局稽查大队市场监管员小张接到电话举报，举报人称，本县城关镇零售户“一康便利店”销售的A品牌卷烟激光喷码模糊不清，怀疑是假烟。小张认为这一线索价值较小，故未做记录，也未向稽查大队负责人汇报。第二天，小张和另一名市场监管员小王来到一康便利店，一康便利店店主康某正在店中。小张、小王经出示证件、表明身份后，依法对该店进行了检查。在对该店柜台内的卷烟进行检查时，小张对康某说...
查看完整题目与答案
【单选题】流线型舵设计呈中间空心并要求的水密的主要目的是( )。
A.
获得浮力减轻舵承压力
B.
节省材料及简化制造工艺
C.
降低造价增加强度
D.
提高水动力性能
查看完整题目与答案
【单选题】Considering a PPF with health care services on the vertical axis and other goods and services on the horizontal axis, the increasing production of health care services in the United States as a result...
A.
a movement upward along the PPF.
B.
an outward shift of the PPF from the vertical axis.
C.
an outward shift of the PPF from the horizontal axis.
D.
a movement downward along the PPF.
查看完整题目与答案
【单选题】左外连接查询使用的关键字是()。
A.
JOIN
B.
CROSS JOIN
C.
RIGHT JOIN
D.
LEFT JOIN
查看完整题目与答案
【单选题】—This is ______ eraser. —______ her eraser.
A.
a; It’s           
B.
an; Its      
C.
an; It’s
查看完整题目与答案
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