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【简答题】
根据二元组关系,画出对应逻辑图形的草图,指出它们属于何种数据结构。 2. B=(D,R),其中: D={a,b,c,d,e,f}, R={r} R={ , , , , } (尖括号表示结点之间关系是有向的)
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【单选题】When people shop at a flea market, how can they settle on a price?
A.
They can question their value.
B.
They can compare with the other sellers.
C.
They can bargain on a price acceptable to both.
D.
They can expect a fifty percent discount.
【简答题】Nowadays, more and more people like to shop on the Internet. How can you protect yourself from different types of Internet tricks? Following these tips can make you online shopping safer： (1) Never ...
【单选题】---Can you tell me why more and more people choose to shop in a supermarkets? ---Because it offers a great ______ of goods.
A.
connection
B.
mixture
C.
variety
D.
majority
【简答题】阅读理解。 Mabel is a cashier (收银员) in a big shop in New York. People can buy medicine, watches, sweets, and many other things. They pay Mabel for the things they buy. At the shop people can also buy lotte...
【简答题】People can shop online at home at ________ time of the day.A. any
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