实体联系模型中实体与实体之间的联系不可能是 A.一对一 B.多对多 C.一对多 D.

题型:单项选择题

问题:

实体联系模型中实体与实体之间的联系不可能是

A.一对一

B.多对多

C.一对多

D.对零

考点:计算机等级考试C语言二级C语言笔试
题型:单项选择题

      Martin Lynch, an American businessman, had been going on vacation to a small Mexican fishing village for a number of ears. One morning while going for a walk along the beach, he saw his friend Pablo Perez, a local fisherman. Martin watched Pablo unload his boat and pack the fish in a box.

      Martin noticed Pablo was smiling and looked very happy. He could also see several large fish in the boat. Martin greeted Pablo and asked how long it took to catch the fish. “Just a few hours,” replied Pablo. Martin asked, “Why didn’t you stay longer and catch more fish?” “I have enough for my family,” Pablo said. “And what do you do with the rest of your day?” asked Martin. “I take a nap, play with my children, spend time with my wife, and go into the village to see my friends and play cards, I have a full and busy life.”    

      Martin explained that if Pablo worked longer hours and caught more fish, he could make more money. With the extra money, Pablo could buy more boats and catch money more fish. By selling the fish, Pablo could open his own factory and sell direct to supermarkets.

       “Then what?” asked Pablo. “Well you would probably have to move to Mexico City to run the business. Finally, you would be able to sell your business and make millions of dollars,” replied Martin. “How long will that take?” asked Pablo.

       Martin thought for a while and said it would probably take at least 15 years.

      “And then what” asked Pablo.

       “Well, that’s the best part,” Martin said. “You will be able to retire, buy a house near the ocean, sleep longer, play with your children, spend more time with your wife, see your friends, and play cards.”

66. What is the story mainly about? [ ]

A. A businessman and a fisherman have become friends.

B. A businessman learns how to fish from a fisherman.

C. A businessman wants to become a businessman.

D. A businessman gives advice to a fisherman.

67. What makes the Mexican fisherman happy is ______________. [ ]

A. many friends to visit him

B. a full and busy life

C. more boats and more fish

D. the house near the ocean

68. How can the fisherman make more money in the businessman’s view? [ ]

A. By buying a supermarket.

B. To move to Mexico City.

C. By selling his own business.

D. To work longer and catch more fish.

69. The underlined word “unload” in the passage means ____________.  [ ]

A. put … into               

B. take … away from 

C. break down               

D. set off 

70. We can infer from the passage that ____________.  [ ]

A. the fisherman will stay the same with his life 

B. the fisherman will leave the village for Mexico City 

C. the business man will buy the fisherman’s boat 

D. it takes all day for the fisherman to catch large fish 

题型:单项选择题

骨髓细胞内出现Auer小体常见于

A.急性淋巴细胞白血病

B.慢性粒细胞白血病

C.急性粒细胞白血病

D.溶血性贫血

E.系统性红斑性狼疮

题型:单项选择题

球团的加热速度可以从()摄氏度/分钟的范围内波动。

题型:单项选择题

某医院未经批准新设医疗美容科,从外地聘请了一位退休外科医师担任主治医师,该院的行为的性质属于

A.非法行医
B.超范围执业
C.正常医疗行为
D.特殊情况
E.开展新技术

题型:单项选择题

电路中产生并联谐振时的总电流与分支电流比较是()。

A.大于

B.相等

C.小于

更多题库