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● 建立一个供应商、零件数据库。其中“供应商”表 S(Sno,Sname,Zip,City)分别表示: 供应商代码、 供应商名、 供应商邮编、 供应商所在城市, 其函数依赖为: Sno→(Sname,Zip,City ) ,Zip→City。 “零件”表 P(Pno,Pname,Color,Wei
● 建立一个供应商、零件数据库。其中“供应商”表 S(Sno,Sname,Zip,City)分别表示:供应商代码、供应商名、供应商邮编、供应商所在城市,其函数依赖为:Sno→(Sname,Zip,City ) ,Zip→City。 “供应商”表 S属于 (53) 。(53)A. 1NFB. 2NF
Many buildings in the city need repairing, but the one ______first is the library.A.repaired B.being repairedC.repairing D.to be repaired
From their _____on the top of the TV Tower, visitors can have a better view of the city.A.stageB.position C.conditionD.situation
CGUATEMALA CITY (Reuters) – A fish that lives in mangrove swamps(红树沼泽)across the Americas can live out of water for months at a time, similar to how
—I wish I could. But I’m on my way out. I have to be in the city in an hour.—63
Why did the woman leave her hometown?A.To lend a city life.B.To open a restaurart.C.To find a job.
Why did the woman leave her hometown?A.To lead a city life.B.To open a restaurant.C.To find a job.
Many buildings in the city need repairing, but the one_______ first is the library.A.repairedB. being repairedC. repairingD.to be repaired
I was born in New Orleans, Louisiana, a city name will create a picture of beautiful trees and green grass in our mind.A. which B. of which C. that D
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