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【简答题】
在关系模式R(D，E，G)中，存在函数依赖关系{E→D，(D，G)→E}，则候选码为__________。
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举一反三
【简答题】I see a very clear link here between British science, the development of British universities and the technological revolution. A couple of weeks ago, I had a presentation at Downing Street from some ...
【单选题】听 Passage in Unit 3 ,Book 1 9. Why do the woman have pain in their neck and back?
A.
Because they carry heavy water on their heads.
B.
Because they walk a lot and push a heavy can.
C.
Because its difficult to walk on the bumpy road
D.
Because its difficult to pump water into a plastic can.
【简答题】The British Musuem is the first _________ _________ museum in the world.
【单选题】顺序循环队列中(数组的大小为 6 ),队头指示 front 和队尾指示 rear 的值分别为 3 和 0 ,当从队列中删除 1 个元素,再插入 2 个元素后, front 和 rear 的值分别为( )
A.
5 和 1
B.
2 和 4
C.
1 和 5
D.
4 和 2
【简答题】British English and American English A student is studying British English. He wonders: Can I have a talk with Americans? Can they catch me? Learners of English often ask--what are the differences bet...
【简答题】It is the first time that I (pay)______a visit to the British Museum.
【单选题】听 Passage in Unit 3 ,Book 1 11.How does the speaker describe the place to pump water?
A.
It is a place high up the mountain.
B.
It is a place not far from people's homes.
C.
It is a place for people to get water three times every week
D.
It is a place for people to wait for their turns to get water.
【单选题】听 Passage in Unit 2 ,Book 1 7. What did the three-year-old girl do?
A.
She brought dogs inside her house
B.
She watched her parents drink alcohol
C.
She left the dogs outside the doghouse
D.
She ran on her hands and feet like dogs.
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