某公司需建立产品信息数据库,经调查其业务要求如下: Ⅰ.一种产品可以使用多个不同

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问题:

某公司需建立产品信息数据库,经调查其业务要求如下:
Ⅰ.一种产品可以使用多个不同种类的部件,也可以使用多个不同种类的零件;一种部件至少被用在一种产品中;一种部件可以由多个不同种类的零件组成;一种零件至少被用在一种产品或一种部件中。
Ⅱ.对于一种具体的部件,要记录这种部件使用的各种零件的数量。
Ⅲ.对于一种具体的产品,要记录这种产品使用的各种部件数量和各种零件数量,但部件所使用的零件数量不计入该种产品的零件数量。
Ⅳ.一个供应商可供应多种零件,但一种零件只能由一个供应商供应。
根据以上业务要求,某建模人员构建了如下E-R图:
[*]
此E-R图中的实体的属性完整,但实体、联系的设计存在不合理之处。

根据重构的E-R图给出符合3NF的关系模式,并标出每个关系模式的主码和外码。

考点:计算机等级考试数据库工程师数据库概念设计及数据建模(一)
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为尽快明确诊断及鉴别诊断,询问病史时应注意

A.头痛的部位

B.家人有无类似发作

C.有无高血压、动脉硬化史

D.有无慢性颅内压增高,如头痛、呕吐及视力减退史

E.有无全身慢性感染病灶

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“Here, waiter! Look at your soup. What’s this? Is it vegetable soup? No. It’s fly(苍蝇) soup! Look at the bluebottle! Terrible! Pour it onto the face of the cook. Who wants such a wonderful soup?” shouted a middle-aged lady. In less than a second, the customers gathered around her table. A young waiter was already holding the soup plate, searching for the fly with a spoon. The lady was angry. The manager came out to see what the trouble was. “Bring her another bowl of soup” was his order. The lady wanted to show the fly to the manager. As she reached for the spoon, she pointed at something blue in it. “Look, that’s the fly!” she shouted.

The crowd pressed closer and stared at the spoon in the young waiter’s hand. Just before they could see it clearly, the man put the spoon full of soup into his mouth. Biting slightly, after a while, he smiled and nodded, “It’s really a piece of burnt green onion. I firmly believe that is worthy of our fame.” On hearing this, people laughed and walked away. The woman was at a loss and didn’t know if she could drink the soup or leave it there.

The whole incident lasted only a few minutes. Not long after that the waiter who had saved the restaurant form disgrace (不光彩) soon got a rise.

1. The “bluebottle” the lady mentioned means          .

A. a kind of soup          B. a kind of fly             C. the soup plate           D. the spoon

2. Seeing what had happened, the manager          .

A. knew that the fault would make this restaurant lose face

B. scolded the waiter to smooth down (消除) the lady’s anger

C. said sorry to the woman for the soup

D. sent away the cook who had caused so much trouble

3. Form the passage we can infer that the young waiter ate the fly, just because       .

A. it’s really his fault to make the lady angry

B. he didn’t want others to drive the cook out of the restaurant

C. he wanted to show what he ate was nothing but a piece of green onion

D. he was afraid he would be sent away by the manager

4. The young waiter saved the restaurant’s fame by           .

A. eating the fly in soup                  B. telling the truth to everyone

C. saying sorry to the lady                D. pointing out what the lady said was wrong

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群众文化活动的活动方式有哪些?

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张林是奇美公司的总经理,潘洪是奇美公司的财务主管。奇美公司每年生产的紫水晶占全世界紫水晶产品的2%。潘洪希望公司通过增加产量使公司利润增加。张林却认为:增加产量将会导致全球紫水晶价格下降,反而会导致利润减少。
以下哪项最为恰当地指出了张林的逻辑推断中的漏洞______

A.将长期需要与短期需要互相混淆
B.将未加工的紫水晶与加工后紫水晶的价格互相混淆
C.不当地假设公司的生产目标与财务目标不一定是一致的
D.不当地假设奇美公司的产品供给变化会显著改变整个水晶市场产品的总供给

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在使用CoolEDitPro过程中,下列说法中正确的是()

A、"FADeIn"处理就是淡入处理,根据需要,对淡入处理的各项参数进行设置,处理后的音频由强到弱逐渐达到音量的正常值

B、"FADeout"处理就是淡出处理,根据需要,对淡出处理的各项参数进行设置,处理后的音频由强到弱逐渐变为静音

C、"FADeIn"处理就是淡出处理,根据需要,对淡出处理的各项参数进行设置,处理后的音频由强到弱逐渐变为静音

D、"FADeout"处理就是淡入处理,根据需要,对淡入处理的各项参数进行设置,处理后的音频由弱到强逐渐达到音量的正常值

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