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第38～－40题基于如下供应商关系S和零件关系P。它们的主码分别是“供应商号”和“零件号”，而且，零件关

第38～-40题基于如下供应商关系S和零件关系P。它们的主码分别是“供应商号”和“零件号”，而且，零件关系P的属性“颜色”只能取值为（红，白，蓝）。

第38～－40题基于如下供应商关系S和零件关系P。它们的主码分别是“供应商号”和“零件号”，而且，零

如果要删除关系S中的元组，（）元组可以被删除（不考虑级联删除和空值删除）。A．（’100’，’红星’，’北京’）B．（’200’，’宇宙’，’上海’）C．（’300’，’黎明’，’天津’）D．（’400’，’立新’，’重庆’）

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更多“第38～－40题基于如下供应商关系S和零件关系P。它们的主码…”相关的问题

第1题

请选出简答第（四）题中你的存疑题，并写一下你的问题或（）

A.第37题

B.第38题

C.第39题

D.第40题

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第2题

根据以下内容回答下列各题 What does it take to be a well-trained nurse？ The answer used to

be two-year associates or four-year bachelors degree programs. But as the nursing shortage 36 , a growing number of schools and hospitals are establishing "fast-track programs" that enable college graduates with no nursing 37 to become registered nurses with only a year or so of 38 training. In 1991, there were only 40 fast-track curricula; now there are more than 200. Typical is Columbia Universitys Entry to Practice program. Students earn their bachelor of science in nursing in a year. Those who stay on for an 39 two years can earn a masters degree that 40 them as nurse practitioners (执业护士) or clinical nurse specialists. Many students are recent 41 ; others are career switchers. Rudy Guardron, 32, a 2004 graduate of Columbias program, was a premedical student in college and then worked for a pharmaceutical (药物的) research company. At Columbia, he was __42__ as a nurse practitioner. "I saw that nurses were in high 43 and it looked like a really good opportunity," he says. "Also, I didnt want to be in school for that long. " The fast-track trend fills a need, but its also creating some 44 between newcomers and veterans. "Nurses that are still at the bedside 45 these kids with suspicion," says Linda Pellico, who has taught nursing at Yale University for 18 years. "They wonder, how can they do it quicker？" The answer is they dont. A)additional B)applied C)demand D)excessive E)experience F)expores G)graduates H)operations I)promote J)qualifies K)specialized L)tension M)trained N)view O)worsens 第36题应填____

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请帮忙给出每个问题的正确答案和分析，谢谢！

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第3题

Questions 下列各are based on the following passage. To get a sense of how women have prog

ressed in science, take a quick tour of the physics department at the University of California, Berkeley. This is a storied place, the 36 of some of the most important discoveries in modern science--starting with Ernest Lawrences invention of the cyclotron (回旋加速器．in1931. A generation ago, female faces were 37 and, even today, visitors walking through the first floor of LeConte Hall will see a full corridor of exhibits 38 the many distinguished physicists who made history here, 39 all of them white males. But climb up to the third floor and youll see a 40 display. There, among the photos of current faculty members and students, are portraits of the 41 head of the department, Marjorie Shapiro, and four other women whose research 42 everything from the mechanics of the universe to the smallest particles of matter. A sixth woman was hired just two weeks ago. Although theyre still only about 10 percent of the physics faculty, women are clearly a presence here. And the real 43 may be in the smaller photos to the right: graduate and undergraduate students, about 20 percent of them female. Every year Berkeley sends its fresh female physics PhDs to the countrys top universities. That makes Shapiro optimistic, but also 44 "I believe things are getting better," she says, "but theyre not getting better as 45 as I would like. A．circumstance B．confidence C．covers D．current E．deals F．different G．exposing H．fast I．honoring J．hope K．presently L．rare M．realistic N．site O．virtually 第36题应填____

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请帮忙给出每个问题的正确答案和分析，谢谢！

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第4题

基于以下题干，回答问题一美术教师计划从8门课F，H，L，N，O，P，S和W中恰好选出6门来连续讲3天课。每天

基于以下题干，回答问题

一美术教师计划从8门课F，H，L，N，O，P，S和W中恰好选出6门来连续讲3天课。每天恰好讲两门课，上午和下午各讲一门课。该计划遵循以下原则：

(1)若有O时，O一定是在第2天；

(2)若有S和W时，S和W只能在上午；

(3)O和P不能与L在同一天；

(4)若户安排在第1天或第2天时，F和打一定被安排在户后面的一天且连续，但 F和H的先后顺序不能确定。

下面哪一项是第l天、第2天和第3天内的一个可以接受的讲课计划？

A．上午，L，H，S；下午：P，F，N

B．上午：N，O，F，下午：L，P，H

C．上午：O，H，N；下午：P，F，I

D．上午：S，L，N；下午：W，F，P

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第5题

某公司拟采购一批零件，价值5400元，供应商规定的付款条件如下：立即付款，付5238元；第20天

付款，付5292；第40天付款，付5346元；第60天付款，付全额。每年按360天计算。

要求：回答以下互不相关的问题。

（1）假设银行短期贷款利率为15％，计算放弃现金折扣的成本（比率），并确定对该公司最有利的付款日期和价格；

（2）假设目前有一短期投资报酬率为40％，确定对该公司最有利的付款日期和价格。

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第6题

Questions are based on the following passage．Eating fruits and vegetables has proved helpf

Questions are based on the following passage．

Eating fruits and vegetables has proved helpful in preventing various chronic （慢性的） illnesses．Does that mean the more the better？

The data from 16 studies were analyzed，（36）more than 833，234 adults．The span of the studies（37）from 5 to 26 years．56，423 adults participating in the studies died．Overall， the more fruits andvegetables people（38）， the less likely they were to have died during the study period．For every（39）serving eaten， up to four a day， the chance of dying for any reason decreased by 5 percent．Those who ate four servings a day were 24 percent less（40）to have died than those who ate none atall．However， eating five or more daily servings indicated no added（41） Higher consumption offruits and vegetables also showed（42）no effect on the probability of dying from cancer．

Although the recommendation of the（43）serving varies with age， health status and other

factors， most adults are called for to fill half their plate with fruits and vegetables．The food pyramidmodel（44）that adults eat three to five servings of vegetables and two to four servings offruits dally．

However， the study did not determine whether certain fruits or vegetables were more or lessbeneficial than others．It indeed inferred that there"s a（n）（45）to how much fruit and vegetables aregood for you．

A．additional

B．annual

C．benefit

D．boundary

E．consumed

F．daily

G．essentially

H．Financially

I．Investing

J．Involving

K．Likely

L．Limit

M．Probable

N．Ranged

O．Suggested

第（36）题应填__________ 查看材料

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第7题

第 10 题：封装、继承和多态是面向对象编程的三大特征，在 Java 开发过程中有着广泛应用。以下关于它们的描述不正确的是（）

A.封装是将数据和基于数据的操作封装成一个整体对象，通过接口实现对数据的访问和修改

B.继承关系中共有的类属性特征均需在父类和子类中进行说明

C.多态使得一个类实例的相同方法在不同情形有不同表现形式

D.多态机制使具有不同内部结构的对象可以共享相同的外部接口

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第8题

某百货公司连续40天的商品销售额如下：（单位：万元) 41 25 29 47 38 34 30 38 43 40 46 36 45 37 37 36 45

某百货公司连续40天的商品销售额如下：(单位：万元)

41 25 29 47 38 34 30 38 43 40

46 36 45 37 37 36 45 43 33 44

35 28 46 34 30 37 44 26 38 44

42 36 37 37 49 39 42 32 36 35

要求：根据数据分组，编制频数分布表，并绘制直方图和折线图。

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第9题

第八章第38题（）

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第10题

传统的供应商和制造商之间的博弈关系是（）

A.战略合作

B.零和博弈

C.合作伙伴

D.长期交易

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第11题

地质条件、设计桩型、成桩工艺相同的10根桩，检测结果如下：请计算桩身波速平均值（)。A、3860m／sB、38

A.3860m/s

B.3889m/s

C.3907m/s

D.3912.5m/s

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