数据模型是用来描述数据库的结构和语义的、数据模型有概念数据模型和结构数据模型两类。E

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问题:

数据模型是用来描述数据库的结构和语义的、数据模型有概念数据模型和结构数据模型两类。E-R模型是______。

考点:计算机等级考试ACCESS二级ACCESS笔试57
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When I was looking for a Christmas present for my daughter in a toy store, a nicely dressed little girl, with some money in her little hand, was looking at some beautiful dolls. When she saw a doll she liked, she would ask her father if she had enough money. He usually said yes.
At the same time, a boy, with old and small clothes, was looking at some video games. He, too, had money in his hand, but it looked no more than five dollars. Each time he picked up one of the video games and looked at his father, he shook his head.
The little girl had chosen her doll, a very beautiful one. However, she noticed the boy and his father. She saw the boy give up a video game with disappointment and walk to another corner of the store.
The little girl put her doll back to the shelf and ran over to the video game. After she talked to her father, she paid for the video game and whispered(耳语) to the shop assistant.
So the boy got the video game that he wanted for free—he was told it was a prize from the store. He smiled happily, although he felt it was so incredible. The girl saw all this happen. She smiled, too.
When I walked out of the store to my car, I heard the father ask his daughter why she had done that. I would never forget their short talk. " Daddy, didn’t Grandma want me to buy something that would make me happy"
He said, "Of course, she did. "
"Well, I just did!" With that, the little girl started skipping towards their car happily.

The boy ______.

A.wore new and nice clothes
B.had much money in his hand
C.was from a poor family

D.wanted to get a doll very much

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景区景点导游人员负责对游客的导游讲解,解答游客的问题。( )

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患者男,45岁。吸烟20年,声嘶1个月余,伴喉部异物感,咽部疼痛。体检:PS=1,颈部浅表淋巴结未及肿大,扁桃体不大,咽后壁充血明显。间接喉镜发现右侧声带活动受限,局部似可见新生物。

结合临床症状首先考虑可能的肿瘤诊断是()

A.食管癌

B.喉癌

C.肺癌

D.下咽癌

E.扁桃体癌

题型:填空题

宫某为某省司法局副局长,其表姐薛某为某报社记者,张某为薛某的同事。张某的儿子因聚众斗殴致人重伤被依法追究刑事责任,张某得知薛某与宫某的关系后,便交给薛某3万元请其向宫某“疏通”此事。薛某向宫某说明情况,并将2万元交给宫某妻子,但宫某拒绝为其说情。薛某遂以“司法局副局长表姐”的身份直接找到审理此案的法院审判长潘某,潘某迫于压力枉法裁判,将张某儿子无罪释放。对于本案下列说法正确的是( )。

A.宫某与薛某均构成受贿罪

B.宫某不构成犯罪,薛某构成受贿罪

C.薛某不具备受贿罪的主体资格,不构成犯罪

D.宫某及其妻子构成受贿罪

题型:填空题

对填料的选择原则错误的是()。

A、单位体积填料的表面积要大,气液相接触的自由体积要大

B、对气相阻力要小,即空隙截面积小

C、质量要轻,机械强度要高,耐介质腐蚀,经久耐用,价格低廉

D、根据操作压力和介质来选择填料的材质

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