第6章课后习题答案

第6章课后习题答案
第6章课后习题答案

REVIEW QUESTIONS

1.Describe the id, ego, and superego and tell how they work together according

to Freudian theory.

The id is entirely oriented toward immediate gratification—it is the “party

animal” of the mind. The superego is the counterweight to the id. This system is essentially the person’s conscience. It internalizes society’s rules

(especially as parents teach them to us and works to prevent the id from

seeking selfish gratification. Finally, the ego is the system that mediates

between the id and the superego. It is in a way a referee in the fight between

temptation and virtue.

(10 minutes, Chapter Objective 1, AACSB: Reflective Thinking, Course Learning Outcome 8)

2.What is motivational research? Give an example of a marketing study that

used this approach.

In the 1950s, a perspective called motivational research attempted to use

Freudian ideas to understand the deeper meanings of products and

advertisements. This approach was largely based on psychoanalytic

(Freudian) interpretations, with a heavy emphasis on unconscious motives. A basic assumption is that socially unacceptable needs are channeled into

acceptable outlets.Motivational research for the American Red Cross did find that men (but not women) tend to drastically overestimate the amount of blood taken from them during a donation. The Red Cross counteracted the fear of

loss of virility by symbolically equating the act of giving blood with

fertilization: “Give the gift of life.”

(10 minutes, Chapter Objective 1, AACSB: Reflective Thinking, Course Learning Outcome 2)

3.Describe three personality traits relevant to marketers.

Some specific traits that are relevant to consumer behavior include:

innovativeness (the degree to which a person likes to try new things);

materialism (amount of emphasis placed on acquiring and owning products);

self-consciousness (the degree to which a person deliberately monitors and

controls the image of the self that is projected to others), and need for

cognition (the degree to which a person likes to think about things and by

extension expands the necessary effort to process brand information). Another trait relevant to consumer behavior is frugality. Frugal people deny

short-term purchasing whims, choosing instead to resourcefully use what they already own.

(5 minutes, Chapter Objective 1, AACSB: Reflective Thinking, Course Learning Outcome 8)

4.List three problems that arise when we apply trait theory to marketing

contexts.

The use of standard personality trait measurements to predict product choices has met with mixed success at best. In general, marketing researchers simply

have not been able to predict consumers’ behaviors on the basis of measured

personality traits. These are some explanations for these equivocal results:

?Many of the scales are not sufficiently valid or reliable; they do not adequately measure what they are supposed to measure, and their

results may not be stable over time.

?Personality tests are often developed for specific populations (e.g., mentally ill people); these tests are then “borrowed” and applied to the

general population where their relevance is questionable.

?Often the tests are not administered under the appropriate conditions;

people who are not properly trained may give them in a classroom or at

a kitchen table.

?The researchers often make changes in the instruments to adapt them to their own situations, in the process deleting or adding items and

renaming variables. These ad hoc changes dilute the validity of the

measures and also reduce researchers’ ability to compare results across

consumer samples.

?Many trait scales are intended to measure gross, overall tendencies

(e.g., emotional stability or introversion); these results are then used to

make predictions about purchases of specific brands.

?In many cases, a number of scales are given with no advance thought about how these measures should be related to consumer behavior. The

researchers then use a “shotgun approach,” following up on anything

that happens to look interesting.

(20 minutes, Chapter Objective 1, AACSB: Reflective Thinking, Course Learning Outcome 8)

5.Define a brand personality and give two examples.

A brand personality is the set of traits people attribute to a product as if it

were a person. Marlboro may be viewed as rugged and outdoorsy. Many of

the most recognizable figures in popular culture are spokescharacters for

long-standing brands, such as the Jolly Green Giant, the Keebler Elves, or

Charlie the Tuna.

(5 minutes, Chapter Objective 1, AACSB: Reflective Thinking, Course Learning Outcome 8)

6.Define psychographics, and describe three ways marketers can use it.

When marketers combine personality variables with knowledge of lifestyle

preferences, they have a powerful lens with which to focus on consumer

segments. We call this approach psychographics, which involves the “use of

psychological, sociological, and anthropological factors . . . to determine how the market is segmented by the propensity of groups within the market—and

their reasons—to make a particular decision about a product, person,

ideology, or otherwise hold an attitude or use a medium.” Psychographic

studies can take several different forms:

? A lifestyle profile looks for items that differentiate between users and nonusers of a product.

? A product-specific profile identifies a target group and then profiles these consumers on product-relevant dimensions.

? A general lifestyle segmentation places a large sample of respondents into homogenous groups based on similarities of their overall

preferences.

? A product-specific segmentation tailors questions to a product category.

For example, in a study done specifically for a stomach medicine, the

item “I worry too much” might be rephrased as “I get stomach

problems if I worry too much.” This allows the researcher to more finely

discriminate between users of competing brands.

(15 minutes, Chapter Objective 2, AACSB: Reflective Thinking, Course Learning Outcome 8)

7.What are three specific kinds of AIOs?

Most contemporary psychographic research attempts to group consumers

according to some combination of three categories of variables—activities,

interests, and opinions—known as AIOs. Using data from large samples,

marketers create profiles of customers who resemble each other in terms of

their activities and patterns of product usage.

(5 minutes, Chapter Objective 2, AACSB: Reflective Thinking, Course Learning Outcome 8)

8.What is VALS2, and how do marketers use it?

One well-known segmentation system is The Values and Lifestyles (VALS?)

System, developed at Strategic Business Insights. The original VALS? system was based on how consumers agreed or disagreed with various social issues

such as abortion rights. After about 10 years, SBI discovered that the social

issues it used to categorize consumers were not as predictive of consumer

behavior as they once had been. SBI searched for a more powerful way to

segment consumers, and the company discovered that certain lifestyle

indicators such as “I like a lot of excitement in my life” were better predi ctors of purchase behavior than the degree to which a person agreed or disagreed

with a social value. The current VALS2? system uses a battery of 39 items

(35 psychological and four demographic) to divide U.S. adults into groups,

each with distinctive characteristics. Marketers use this typology to target

segments that are in their target audience.

(20 minutes, Chapter Objective 2, AACSB: Reflective Thinking, Course Learning Outcome 8)

9.Alcohol drinkers vary sharply in terms of the number of drinks they may

consume, from those who occasionally have one at a cocktail party to regular imbibers. Explain how the 80/20 rule applies to this product category.

According to text, the 80/20 rule s tates that only 20 percent of a product’s

users account for 80 percent of the product sold. For this question, alcohol

drinkers vary according to the number of drinks consumed. Consumers may

be heavy, moderate, or light users. Applying the 80/20 rule, we assume that

80 percent of the alcohol is drunk by 20 percent of the drinkers (who

constitute the heavy-drinker segment). What does this mean with respect to

advertising? What are the legal and ethical considerations of marketing to

these “heavy drinkers”?

(15 minutes, Chapter Objective 3, AACSB: Reflective Thinking, Course Learning Outcome 8)

10.Define consumer addiction and give two examples.

Consumer addiction is a physiological or psychological dependency on products or services. These problems of course include alcoholism, drug addiction, and

cigarettes—and many companies profit from addictive products or by selling

solutions.

(10 minutes, Chapter Objective 3, AACSB: Reflective Thinking, Course Learning Outcome 1)

11.What is an example of a consumed consumer?

Consumed consumers are people who are used or exploited, willingly or not, for commercial gain in the marketplace. Examples include prostitutes and organ

donors.

(5 minutes, Chapter Objective 2, AACSB: Reflective Thinking, Course Learning Outcome 1)

12.What is shrinkage, and why is it a problem?

S hrinkage is the industry term for inventory and cash losses from shoplifting and employee theft. This is a massive problem for businesses that is passed on to

consumers in the form of higher prices. About 40 percent of the losses can be attributed to employees rather than shoppers. Shopping malls spend $6 million annually on security, and a family of four spends about $300 extra per year

because of markups to cover shrinkage.

(15 minutes, Chapter Objective 3, AACSB: Reflective Thinking, Course Learning Outcome 1)

13.Define anti-consumption, and provide two examples of it.

Anticonsumption is defined by events in which products and services are

deliberately defaced or mutilated. Anticonsumption can range from relatively mild acts like spray-painting graffiti on buildings and subways to serious

incidences of product tampering or even the release of computer viruses that can bring large corporations to their knees.

(15 minutes, Chapter Objective 3, AACSB: Reflective Thinking, Course Learning Outcome 1)

CONSUMER BEHAVIOR CHALLENGE

Discussion Questions

1.The Chinese culture has a unique way of dealing with shoplifters: When a

merchant catches one, he demands a stiff fee as a penalty. Some

storekeepers post a traditional slogan: “Steal one, fine 10.” Some Chinese

shopkeepers have adopted this practice, though it is not clear this deterrent

is legal in the U.S.A. For example, in a Chinese grocery store in New York

City, suspected shoplifters caught by the store’s security guards or staff

members have their identification seized. Then, they are photographed

holding up the items they are accused of trying to steal. Finally, workers at

the store threaten to display the photographs to embarrass them, and to call the police — unless the accused thieves hand over money. Some store

owners share their photographs with other stores, or post them in other

store branches they own. Is this an effective and ethical response, and is it

likely to deter shoplifting?

Students are likely to have different opinions about whether this response is

likely to deter shoplifting and regarding whether this is legal and ethical.

Some students may share policies from their own retail experiences where

the shoplifter is not accused or approached to avoid potential liability issues

and/or false accusations. Some may question whether it is appropriate to

execute justice within the store rather than letting the police and judicial

system handle it.

(25 minutes, Chapter Objective 3, AACSB: Ethical Understanding and Reasoning Abilities and Multicultural and Diversity Understanding, Course Learning Outcome 1) 2.Geodemographic techniques assume that people who live in the same

neighborhood have other things in common as well. Why is this assumption

made, and how accurate is it?

Although members of the U.S. culture share a common national identity,

unique climates, cultural influences, and resources have shaped purchase and consumption patterns of different regions. For example, a student from

Minnesota going to a university in the South quickly recognizes that the

regional drink is iced tea or Coke rather than hot chocolate or pop. Similarly,

the easterner will have a very different attitude toward space and crowding

than residents of Texas or New Mexico. Just as we have come to realize that

cultural differences between countries are significant, regional differences

are recognized as influential (e.g., different names for the same thing—pop,

soft drink, soda, soda pop, soda water, coke, tonic).

(10 minutes, Chapter Objective 2, AACSB: Reflective Thinking, Course Learning Outcome 8)

3.Behavioral targeting techniques give marketers access to a wide range of

information about a consumer when they tell them what websites he visits. Do you believe this “knowledge power” presents any ethical problems with

regard to consumers’ privacy? Should the go vernment regulate access to such information? Should consumers have the right to limit access to these data?

Students are likely to have varied responses to this question. Some may view

this as big brother/big company snooping on their lives. Others will view it as part of the public domain. The instructor should encourage students to

examine both sides of the argument. The instructor should bring in the

government involvement in such matters of privacy. How do they feel about their university or college sharing information collected about them with

outside entities? Should this information be sold? Should students have the

right to know to whom the information was given or sold? Should the campus (or off-campus) bookstores be allowed to share or sell information about

students? What type of information must a university or college legally keep

confidential and not sell or distribute (without permission)? How has

information from the Internet changed our view on what information we will provide and what will not be supplied?

(20 minutes, Chapter Objective 2, AACSB: Ethical Understanding and Reasoning Abilities, Course Learning Outcome 8)

4.Should organizations or individuals be allowed to create websites that

advocate potentially harmful practices? Should hate groups such as al-Qaeda

be allowed to recruit members online? Why or why not?

This is a question for the class that is bold and wants to explore controversial issues. On the one hand, is the principle of free speech as guaranteed by the

Constitution? Current law extends this principle to almost all avenues of the

Internet. However, recent federal legislation strongly and firmly prohibited

hate crimes. An interesting way to approach the dilemma posed in this

question is to have a debate or invite a response from a member of a local or regional ACLU office. This always sparks controversy. Please remember that

this question must be handled carefully and at all costs must not be used

offensively. Set some ground rules on this one.

(25 minutes, Chapter Objective 3, AACSB: Ethical Understanding and Reasoning Abilities, Course Learning Outcome 1)

5.An entrepreneur made international news when he set up a website to

auction the egg cells of fashion models to the highest bidder (minimum bid:

$15,000). The site was targeted to people who wanted to have very

attractive babies because they believed this would maximize their chances of succeeding in our society. Is the buying and selling of humans just another

example of consumer behavior at work? Do you agree that this service is

simply a more efficient way to maximize the chance of having happy,

successful children? Should this kind of marketing activity be allowed? Would you sell your eggs or sperm on a website?

This question should spark discussion revolving around various ethical issues.

One issue is that of the consumed consumer. Is the selling of all or part of a

human being an acceptable practice if that person has given their consent? In such a case, is the person truly being exploited for commercial gain? Both

sides of this issue will emerge as some students will adamantly profess that

such practices are morally wrong while others will view this as a perfectly

acceptable way for consumers to become suppliers, thereby exercising their

rights as participants in the free enterprise system.

Another issue that should emerge is that of the emphasis that society places

on physical beauty. Again, some will contend that this is simply a cultural

value that has come about naturally and that there is nothing wrong with it.

Others will focus more on the role that marketing has played in “artificially”

increasing the importance of physical characteristics as a value.

A third issue that students may identify is somewhat related to the previous.

Does marketing foster incorrect perceptions of how to achieve happiness?

Numerous examples might arise such as owning products with a high-status

image, engaging in leisure activities, or even consuming various food and

beverage items. Although numerous promotions may imply that purchasing

such products leads to happiness, the example given in this question is much

more blatant.

(20 minutes, Chapter Objective 3, AACSB: Ethical Understanding and Reasoning Abilities, Course Learning Outcome 1)

Application Questions

1.Construct a brand personality inventory for three different brands within a

product category. Ask a small number of consumers to rate each brand on

ten different personality dimensions. What differences can you locate? Do

these “personalities” relate to the advertising and packaging strategies used

to differentiate these products?

The first thing students will have to do to answer this question is to establish

the ten personality dimensions. They are free to construct these as they

choose; however, the material in the chapter offers some suggestions. The

differences will be the result of differences observed. It will be easier for them if they choose products from a brand category with which they are familiar.

(Many times students will know more about the brand than what is shown in the advertisement.) Be sure the students demonstrate “how” personalities

relate to the advertising and packaging used by the marketer to differentiate these products.

(60 minutes, Chapter Objective 1, AACSB: Reflective Thinking, Course Learning Outcome 8)

https://www.360docs.net/doc/9a3338779.html,pile a set of recent ads that attempt to link consumption of a product

with a specific lifestyle. How does a marketer usually accomplish this goal?

Students should be able to find a variety of advertisements to represent the

link of product consumption with specific lifestyle. Examples include luxury

cars, cruises, polo, and golf linked to an affluent lifestyle; used cars and

furniture, small apartments, stereos, and books linked to the university

student lifestyle; Miller beer linked to the young, single, sports-fanatic male

lifestyle.

(30 minutes, Chapter Objective 2, AACSB: Reflective Thinking, Course Learning Outcome 8)

3.Political campaigns may use psychographic analyses. Conduct research on

the marketing strategies used in a recent, major election. How did the

campaigning segment voters in terms of values? Can you find evidence that

communications strategies were guided by this information?

Students should recognize the power of psychographic analyses in defining

target consumers and positioning political candidates for office. They should

search for campaign literature that is designed for different targets and that

might even contradict each other, looking for obvious and subtle differences.

This type of polling data is difficult to get because it is closely guarded by the

candidates and their pollsters, but often just by viewing the ads one can

identify the target audience. The students might also like to comment on

recent political scandals that have been rampant in Washington. What do

these scandals (and the ability to retain public confidence during or after the

scandal) tell us about values? What data were students able to get from the

most recent presidential election? Comment on the communications

strategies used by the two candidates.

(15 minutes, Chapter Objective 2, AACSB: Analytic Skills, Course Learning Outcome 8)

4.Construct separate advertising executions for cosmetics products that target

the Believer, Achiever, Experiencer, and Maker VALS2 types. How would the

basic appeal differ for each group?

Students should review the information in the text before trying to design

advertising campaigns for the various VALS2 types.

?Believers—strong principles, favor proven brands

?Achievers—career-oriented, avoid risk, self-discovery

?Experiencers—impulsive, young, offbeat, love risk

?Makers—action-oriented, self-sufficiency, do-it-yourselfers

(30 minutes, Chapter Objective 2, AACSB: Reflective Thinking, Course Learning Outcome 8)

CASE STUDY TEACHING NOTES

Chapter 6 Case Study: Zipcar Creates a Rental Car Culture

Summary of Case

Zipcar is a simple, fun service that rents cars by the hour. Cars can be reserved online or through a mobile app. The Zipcar website is described as clever, fun and conversational. Zipsters (Zipcar renters) are described as individuals “who believe in cost-effective transportation solutions that are good for the planet and easy on the wallet.” Zipcar wants to rent cars and transform urban life by making it more rewarding, sustainable and affordable.

Suggestions for Presentation

This case can be used to illustrate many of the concepts from this chapter. However, most specifically, this case was designed to use as a teaching tool for the two concepts identified in the discussion questions: brand personality and lifestyles. This case can be made very fun and relevant by including current news items, pictures, and ads. The instructor might also wish to arrange for some students who have used Zipcars to talk about their motivations for use and what it means to him/her to be a “Zipster”.

Suggested Answers for Discussion Questions

https://www.360docs.net/doc/9a3338779.html,pare the brand personality of Zipcar to Avis or Hertz.

What are the traits that people (students) attribute to this product? If you

have Zipcar users in the class, they may ascribe very personal characteristics

to Zipcar. However, there will be some general personality traits likely to

emerge: intelligent, cool, hip, flexible, efficient are a few/

(10 minutes, Chapter Objective 1, AACSB: Reflective Thinking, Course Learning Outcome 8)

2.How would you describe the psychographic profile of a typical Zipster?

Students may offer up that there are many identifiable lifestyles, but should

note open-minded city dwellers with an interest in the environment and

efficiency are described in the case. If students use the VALS2 typology, they

may select the Innovators because they are concerned about social issues,

but they may also note that someone with strong ideals about protecting the environment (Thinkers, Believers) and/or someone young and hip who lives in an urban environment and is willing to take risks (Experiencers) may be

desirable segments for the Zipster as well.

(15 minutes, Chapter Objective 2, AACSB: Reflective Thinking, Course Learning Outcome 8)

大学物理第六章课后习题答案(马文蔚第五版)

大学物理第六章课后习题答案(马文蔚第五版) -CAL-FENGHAI-(2020YEAR-YICAI)_JINGBIAN

第六章静电场中的导体与电介质6 -1将一个带正电的带电体A 从远处移到一个不带电的导体B 附近,则导体B 的电势将() (A)升高(B)降低(C)不会发生变化(D)无法确定 分析与解不带电的导体B 相对无穷远处为零电势。由于带正电的带电体A 移到不带电的导体B 附近时,在导体B 的近端感应负电荷;在远端感应正电荷,不带电导体的电势将高于无穷远处,因而正确答案为(A)。 6 -2将一带负电的物体M靠近一不带电的导体N,在N 的左端感应出正电荷,右端感应出负电荷。若将导体N 的左端接地(如图所示),则() (A) N上的负电荷入地(B)N上的正电荷入地 (C) N上的所有电荷入地(D)N上所有的感应电荷入地 分析与解导体N 接地表明导体N 为零电势,即与无穷远处等电势,这与导体N在哪一端接地无关。因而正确答案为(A)。 6 -3如图所示将一个电量为q的点电荷放在一个半径为R的不带电的导体球附近,点电荷距导体球球心为d,参见附图。设无穷远处为零电势,则在导体球球心O点有() 2

3 (A )d εq V E 0π4,0== (B )d εq V d εq E 02 0π4,π4== (C )0,0==V E (D )R εq V d εq E 020π4,π4== 分析与解 达到静电平衡时导体内处处各点电场强度为零。点电荷q 在导 体球表面感应等量异号的感应电荷±q′,导体球表面的感应电荷±q′在球心O 点激发的电势为零,O 点的电势等于点电荷q 在该处激发的电势。因而正确答案为(A )。 6 -4 根据电介质中的高斯定理,在电介质中电位移矢量沿任意一个闭合曲面的积分等于这个曲面所包围自由电荷的代数和。下列推论正确的是( ) (A ) 若电位移矢量沿任意一个闭合曲面的积分等于零,曲面内一定没有自由电荷 (B ) 若电位移矢量沿任意一个闭合曲面的积分等于零,曲面内电荷的代数和一定等于零 (C ) 若电位移矢量沿任意一个闭合曲面的积分不等于零,曲面内一定有极化电荷

高等数学课后习题答案第六章

习题6-2 1.求图6-21中各画斜线部分的面积: (1) 解 画斜线部分在x 轴上的投影区间为[0,1]. 所求的面积为 6 1]2132[)(1022310=-=-=?x x dx x x A . (2) 解法一 画斜线部分在x 轴上的投影区间为[0,1]. 所求的面积为 1|)()(101 0=-=-=?x x e ex dx e e A , 解法二 画斜线部分在y 轴上的投影区间为[1,e ]. 所求的面积为 1)1(|ln ln 1 11=--=-==??e e dy y y ydy A e e e . (3) 解画斜线部分在x 轴上的投影区间为[-3,1]. 所求的面积为

3 32]2)3[(1 32=--=?-dx x x A . (4) 解画斜线部分在x 轴上的投影区间为[-1,3]. 所求的面积为 3 32|)313()32(31323 12=-+=-+=--?x x x dx x x A . 2. 求由下列各曲线所围成的图形的面积: (1)221 x y =与x 2+y 2=8(两部分都要计算); 解: 3 88282)218(22 0220220220221--=--=--=????dx x dx x dx x dx x x A 3 4238cos 16402+=-=?ππ tdt . 3 46)22(122-=-=ππS A . (2)x y 1 =与直线y =x 及x =2;

解: 所求的面积为 ?-=-=2 12ln 2 3)1(dx x x A . (3) y =e x ,y =e -x 与直线x =1; 解: 所求的面积为 ?-+=-=-1 021)(e e dx e e A x x . (4)y =ln x ,y 轴与直线y =ln a , y =ln b (b >a >0). 解 所求的面积为 a b e dy e A b a y b a y -===?ln ln ln ln 3.求抛物线y =-x 2+4x -3及其在点(0,-3)和(3,0)处的切线所围成的图形的面积. 解:

南开大学《遗传学》练习题-第6章答案.doc

性 * 弟八早 1 重组极性杂合DNA 模型中的异常分离现象最早是在酵母不同交配型的杂交中发现的。合子减数 分裂产生的4个子囊抱子除了正常的2A:2a 分离外,出现了 3J:U 或者1/1:3〃的分离,试用某种DNA 重组模型加以说明,并附图解。 答:Holliday 模型,发生单链交换以后的局部异源双链在细胞内的错配修复系统识别下将其 中的一条链切除。前提:酶系统只选择性的切除两条异源双链中的一条,而不是随机切除一 条链。图参见课件。 2 子囊通纲的一种真菌Ascobulus 的一些突变产生浅色子囊泡子,成为a 突变体。不同a 突变体进行了以 下的杂交,观察具有黑色野生型子囊饱子的子囊,杂交中出现的黑色饱子的基因型如下: 答:三次转换,总计:%—1次;⑶一0 次;々3—2次。基于“同线分析”原理,与断点连锁越 1 2 J 紧密,越易发生基因转变。由于。3离断裂位点最近,气次之,灼最远,基因转变具有方向 J 1 L 性,因此推断三个位点的顺序为:(重组位点)勺一%一。2。 3 下表表示人一鼠杂种无性系以及它们所包含的人类染色体。检验了人的4种酶:TK (lhymidine-kinase, 胸腺激酶),只在无性系C 中有活性;LDH (lactate dehydrogenase,乳酸脱氢酶),在A 、C 3个无性 系中都有活性;PGK (phpsphoglycerate kinase?磷酸甘油酸激酶),在无性系A 和C 中有活性;AHH (aryl 无性系 人的染色体 X 2 11 17 A + — + — B — + + — C + — + + 答:TK 只有C 系有活性,即A 、B 系无活性,也就是说,A 、B 系是突变体,由于基因与 染色体具有平行关系,因此与17号染色体同线,即TK 基因位于17号染色体。 同理,LDH 位于11号染色体,PGK 位于X 染色体,AHH 位于2号染色体。 1 1 + a\ + 您 + + + 白1 + + + a 2 + + + + + 白2 + "3 + "3 试说明这些结果。有们、。2和。3这三个突变位点的可能次序如何? "|X 〃2 〃]X ?2X ?3

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遗传学课后习题及答案解析

Chapter 1 An Introduction to Genetics (一) 名词解释: 遗传学:研究生物遗传和变异的科学。 遗传:亲代与子代相似的现象。 变异:亲代与子代之间、子代个体之间存在的差异. (二)选择题: 1.1900年(2))规律的重新发现标志着遗传学的诞生。 (1)达尔文(2)孟德尔(3)拉马克(4)克里克 2.建立在细胞染色体的基因理论之上的遗传学, 称之( 4 )。 (1)分子遗传学(2)个体遗传学(3)群体遗传学(4)经典遗传学 3.遗传学中研究基因化学本质及性状表达的容称( 1 )。 (1)分子遗传学(2)个体遗传学(3)群体遗传学(4)细胞遗传学 4.通常认为遗传学诞生于(3)年。 (1)1859(2)1865(3)1900(4)1910 5.公认遗传学的奠基人是(3): (1)J·Lamarck(2)T·H·Morgan(3)G·J·Mendel(4)C·R·Darwin 6.公认细胞遗传学的奠基人是(2): (1)J·Lamarck(2)T·H·Morgan(3)G·J·Mendel(4)C·R·Darwin Chapter 2 Mitosis and Meiosis 1、有丝分裂和减数分裂的区别在哪里?从遗传学角度来看,这两种分裂各有什么意义?那么,无性生殖会发生分离吗?试加说明。 答:有丝分裂和减数分裂的区别列于下表:

有丝分裂的遗传意义: 首先:核每个染色体,准确地复制分裂为二,为形成的两个子细胞在遗传组成上与母细胞完全一样提供了基础。其次,复制的各对染色体有规则而均匀地分配到两个子细胞的核中从而使两个子细胞与母细胞具有同样质量和数量的染色体。 减数分裂的遗传学意义 首先,减数分裂后形成的四个子细胞,发育为雌性细胞或雄性细胞,各具有半数的染色体(n )雌雄性细胞受精结合为合子,受精卵(合子),又恢复为全数的染色体 2n 。保证了亲代与子代间染色体数目的恒定性,为后代的正常发育和性状遗传提供了物质基础,保证了物种相对的稳定性。 其次,各对染色体中的两个成员在后期I分向两极是随机的,即一对染色体的分离与任何另一对染体的分离不发生关联,各个非同源染色体之间均可能自由组合在一个子细胞里,n 对染色体,就可能有2n 种自由组合方式。 例如,水稻n =12,其非同源染色体分离时的可能组合数为212 = 4096。各个子细胞之间在染色体组成上将可能出现多种多样的组合。 此外,同源染色体的非妹妹染色单体之间还可能出现各种方式的交换,这就更增加了这种差异的复杂性。为生物的变异提供了重要的物质基础。 2. 水稻的正常的孢子体组织,染色体数目是12对,问下列各组织染色体数是多少? 答:(1)胚乳:32;(2)花粉管的管核:12;(3)胚囊:12;(4)叶:24;(5)根端:24;(6)种子的胚:24;(7)颖片:24。 3. 用基因型Aabb 的玉米花粉给基因型AaBb 的玉米雌花授粉,你预期下一代胚乳的基因型是什么类型,比例为何? 答:胚乳是三倍体,是精子与两个极核结合的结果。预期下一代胚乳的基因型和比例为下列所示:

第六章课后习题与答案

第六章课后习题与答案: 1.何谓国际直接投资?国际直接投资有哪些类型?其各自的特征是什么? 国际直接投资是指投资者为了在国外获得长期的投资效益并得到对企业的控制权,通过直接建立新的企业、公司或并购原有企业等方式进行的国际投资活动。从一国角度出发,国际直接投资也被称为对外直接投资或外国直接投资(Foreign Direct Investment,简称FDI)。 按照不同的标准来划分,可以把国际直接投资分为不同的类型或形式: (1)按照投资者控制被投资企业产权的程度可以分为独资经营、合资经营、合作经营和合作开发等形式。独资经营是指完全由外商出资并独立经营的一种国际直接投资方式;合资经营是指两国或两国以上的投资者在平等互利原则基础上,共同商定各自在被投资企业的股权比例,并根据东道国的法律,通过签订合同举办合营企业,共同经营、共负盈亏、共担风险的一种投资方式,这也是在国际直接投资中较为常见的一种方式;合作经营与合作开发都是以签订合同或协议为基础的国际经济合作形式。合作经营企业一般不以股份确定产权,不按股权比例分配收益,而是根据合同规定投资方式和投资比例分配收益并承担风险。当然,合作经营企业本身是一个统一的经营实体,具有独立的法人地位。合作开发则通常是由拥有特定资源的国家,通过招标方式与外国投资者签订合作开发协定或合同,并联合组成开发公司对东道国资源进行开发。 (2)按照投资者控制被投资企业的方式,也可以把国际直接投资分为股权参与式的国际直接投资和非股权参与式的国际直接投资。按照这一标准,独资经营属于全部股权参与式投资;合资经营属于部分股权参与式投资;而投资者没有在东道国企业中参与股份,以其他一些形式如许可证合同、管理合约、销售协议等进行的直接投资,均属于非股权参与式的直接投资。 (3)按照投资者是否建立新企业,国际直接投资可分为创建新企业与控制现有国外企业两类。一国投资者到国外单独或合作创办新的企业,或者组建新的子公司进行生产经营活动,均属于前一种形式;而通过收购国外公司或与国外公司合并以获得对东道国企业的控制权,则属于后一种形式。 (4)按照投资主体与其投资企业之间国际分工的方式,可以把国际直接投资分为水平型投资、垂直型投资和混合型投资。水平型直接投资也称为横向型直接投资,是指一国的企业到国外进行投资,建立与国内生产和经营方向基本一致的子公司或其他企业。这类子公司和其他企业能够独立完成生产和销售,与母公司或国内企业保持水平分工关系。垂直型直接投资也称为纵向型直接投资,一般指一国企业或跨国公司到国外建立子公司或附属机构,这些国外子公司或附属机构与母公司之间实行纵向专业化分工协作。混合型投资则是一种水平型和垂直型相结合的直接投资方式。一般来说,目前企业进行国际直接投资,并不单纯是水平型投资或垂直型投资,而是两者兼有,进行混合型投资。 除此之外,还有一种划分国际直接投资类型的方法,即按照投资主体的性质把国际直接投资分为私人直接投资和国家直接投资,二者有时也被分别称为民间直接投资和官方直接投资。 2.战后以来国际直接投资迅速增长的原因有哪些? 国际直接投资的发展,其最根本的原因可以从国际资本流动本身的规律来考察。一般情况下,国际资本流动是随着生产力水平的提高和世界市场的成熟而从流通领域逐步深入到国际生产领域的。这一发展规律从根本上决定了国际直接投资不断扩大的趋势。但战后国际直接投资的增长势头如此迅猛,还有其他许多因素的作用。从宏观层面来看,主要包括以下

遗传学课后习题与答案

第二章孟德尔定律 1、为什么分离现象比显、隐性现象有更重要的意义? 答:因为1、分离规律就是生物界普遍存在的一种遗传现象,而显性现象的表现就是相对的、有条件的;2、只有遗传因子的分离与重组,才能表现出性状的显隐性。可以说无分离现象的存在,也就无显性现象的发生。 2、在番茄中,红果色(R)对黄果色(r)就是显性,问下列杂交可以产生哪些基因型,哪些表现型,它们的比例如何(1)RR×rr (2)Rr×rr (3)Rr×Rr (4) Rr×RR (5)rr×rr 3、下面就是紫茉莉的几组杂交,基因型与表型已写明。问它们产生哪些配子?杂种后代的基因型与表型怎样?(1)Rr × RR (2)rr × Rr (3)Rr × Rr 粉红 红色白色粉红粉红粉红 合的。问下列杂交可以产生哪些基因型,哪些表型,它们的比例如何?(1)WWDD×wwdd (2)XwDd×wwdd(3)Wwdd×wwDd (4)Wwdd×WwDd 5、在豌豆中,蔓茎(T)对矮茎(t)就是显性,绿豆荚(G)对黄豆荚(g)就是显性,圆种子(R)对皱种子(r)就是显性。

现在有下列两种杂交组合,问它们后代的表型如何?(1)TTGgRr×ttGgrr (2)TtGgrr×ttGgrr解:杂交组合TTGgRr × ttGgrr: 即蔓茎绿豆荚圆种子3/8,蔓茎绿豆荚皱种子3/8,蔓茎黄豆荚圆种子1/8,蔓茎黄豆荚皱种子1/8。 杂交组合TtGgrr ×ttGgrr: 即蔓茎绿豆荚皱种子3/8,蔓茎黄豆荚皱种子1/8,矮茎绿豆荚皱种子3/8,矮茎黄豆荚皱种子1/8。 6、在番茄中,缺刻叶与马铃薯叶就是一对相对性状,显性基因C控制缺刻叶,基因型cc就是马铃薯叶。紫茎与绿茎就是另一对相对性状,显性基因A控制紫茎,基因型aa的植株就是绿茎。把紫茎、马铃薯叶的纯合植株与绿茎、缺刻叶的纯合植株杂交,在F2中得到9∶3∶3∶1的分离比。如果把F1:(1)与紫茎、马铃薯叶亲本回交;(2)与绿茎、缺刻叶亲本回交;以及(3)用双隐性植株测交时,下代表型比例各如何? 解:题中F2分离比提示:番茄叶形与茎色为孟德尔式遗传。所以对三种交配可作如下分析: (1) 紫茎马铃暮叶对F1的回交:

统计学第六章课后题及答案解析

第六章 一、单项选择题 1.下面的函数关系是( ) A现代化水平与劳动生产率 B圆周的长度决定于它的半径 C家庭的收入和消费的关系 D亩产量与施肥量 2.相关系数r的取值范围( ) A -∞< r <+∞ B -1≤r≤+1 C -1< r < +1 D 0≤r≤+1 3.年劳动生产率x(干元)和工人工资y=10+70x,这意味着年劳动生产率每提高1千元时,工人工资平均( ) A增加70元 B减少70元 C增加80元 D减少80元 4.若要证明两变量之间线性相关程度高,则计算出的相关系数应接近于( ) A +1 B -1 C 0.5 D 1 5.回归系数和相关系数的符号是一致的,其符号均可用来判断现象( ) A线性相关还是非线性相关 B正相关还是负相关 C完全相关还是不完全相关 D单相关还是复相关 6.某校经济管理类的学生学习统计学的时间(x)与考试成绩(y)之间建立线性回归方程?=a+bx。经计算,方程为?=200—0.8x,该方程参数的计算( ) A a值是明显不对的 B b值是明显不对的 C a值和b值都是不对的 D a值和b值都是正确的 7.在线性相关的条件下,自变量的均方差为2,因变量均方差为5,而相关系数为0.8时,则其回归系数为:( ) A 8 B 0.32 C 2 D 12.5 8.进行相关分析,要求相关的两个变量( ) A都是随机的 B都不是随机的 C一个是随机的,一个不是随机的 D随机或不随机都可以 9.下列关系中,属于正相关关系的有( ) A合理限度内,施肥量和平均单产量之间的关系 B产品产量与单位产品成本之间的关系 C商品的流通费用与销售利润之间的关系

第6章_课后习题答案1006

第6章 习题解答 6-1 指出下列各类型的触发器中那些能组成移位寄存器,哪些不能组成移位寄存器,如果能 够,在()内打√,否则打×。 (1)基本RS 触发器 ( ); (2)同步RS 触发器 ( ); (3)主从结构触发器 ( ); (4)维持阻塞触发器 ( ); (5)用CMOS 传输门的边沿触发器 ( ); (6)利用传输延迟时间的边沿触发器( )。 解答:(1)×;(2)×;(3)√;(4)√;(5)√;(6)√; 6-2 试分析图6-79所示时序电路的逻辑功能,写出电路的驱动方程、状态方程和输出方程, 画出电路的状态转换图,并且说明电路能够自启动。 解答: 驱动方程:113J K Q ==;221J K Q ==;312J Q Q =、33K Q = 状态方程:111111313113n Q J Q K Q Q Q Q Q Q Q +=+=+= 1 2222212 12 12 n Q J Q K Q Q Q Q Q Q Q +=+=+=⊕ 133333123 33 123 n Q J Q K Q Q Q Q Q Q Q Q Q +=+=+= 输出方程:123CO QQ Q = 状态转换图如下:

此电路为能自启动的同步五进制加法计数器。 6-3 试分析图6-80所示时序电路的逻辑功能,写出电路的驱动方程、状态方程和输出方程, 画出电路的状态转换图。A 为输入逻辑变量。 解答: 驱动方程:12D AQ =;21212()D AQ Q A Q Q ==+ 状态方程:1112n Q D AQ +== 1 221 2()n Q D A Q Q +==+ 输出方程:12CO AQQ = 状态转换表如下: 此电路为串行数据检测器,当输入4个或4个以上的1时输出为1,其他输入情况下输出为0。 6-4 试分析图6-81所示时序电路的逻辑功能,写出电路的驱动方程、状态方程和输出方程, 画出电路的状态转换图。检查电路能否自启动。 解答:

遗传学课后题答案章

遗传学课后题答案章

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第二章孟德尔定律 1、答:因为 (1)分离规律是生物界普遍存在的一种遗传现象,而显性现象的表现是相对的、有条件的;(2)只有遗传因子的分离和重组,才能表现出性状的显隐性。可以说无分离现象的存在,也就无显性现象的发生。 2、解: 序号杂交基因型表现型 1 RR×rr Rr 红果色 2 Rr×rr 1/2Rr,1/2rr 1/2红果色,1/2黄果色 3 Rr×Rr 1/4RR,2/4Rr,1/4rr 3/4红果色,1/4黄果色 4 Rr×RR 1/2RR,1/2Rr 红果色 5 rr×rr rr 黄果色 3、解: 序号杂交配子类型基因型表现型 1 Rr × RR R,r;R 1/2RR,1/2Rr 1/2红色,1/2粉红 2 rr × Rr r;R,r 1/2Rr,1/2rr 1/2粉红,1/2白色 3 Rr × Rr R,r 1/4RR,2/4Rr,1/4rr 1/4红色,2/4粉色,1/4白色 4、解: 序号杂交基因型表现型 1 WWDD×wwdd WwDd 白色、盘状果实 2 WwDd×wwdd 1/4WwDd,1/4Wwdd,1/4wwDd,1/4wwdd,1/4白色、盘状,1/4白色、球状,1/4黄色、盘状,1/4黄色、球状 2 wwDd×wwdd 1/2wwDd,1/2wwdd 1/2黄色、盘状,1/2黄色、球状 3 Wwdd×wwDd 1/4WwDd,1/4Wwdd,1/4wwDd,1/4wwdd,1/4白色、盘状,1/4白色、球状,1/4黄色、盘状,1/4黄色、球状 4 Wwdd×WwDd 1/8WWDd,1/8WWdd,2/8WwDd,2/8Wwdd,1/8wwDd,1/8wwdd 3/8白色、盘状,3/8白色、球状,1/8黄色、盘状,1/8黄色、球状 5.解:杂交组合TTGgRr × ttGgrr: 即蔓茎绿豆荚圆种子3/8,蔓茎绿豆荚皱种子3/8,蔓茎黄豆荚圆种子1/8,蔓茎黄豆荚皱种子1/8。 杂交组合TtGgrr ×ttGgrr: 即蔓茎绿豆荚皱种子3/8,蔓茎黄豆荚皱种子1/8,矮茎绿豆荚皱种子3/8,矮茎黄豆荚皱种子1/8。 6.解:题中F2分离比提示:番茄叶形和茎色为孟德尔式遗传。所以对三种交配可作如下分析: (1) 紫茎马铃暮叶对F1的回交: AaCc×AAc c→AACc、AAcc、AaCc、Aacc 表型二种,比例为1:1 (2) 绿茎缺刻叶对F1的回交: AaCc×aaC C→AaCC、AaCc、aaCC、aaCc 表型二种,比例为1:1 (3)双隐性植株对Fl测交: AaCc×aacc AaCc Aacc aaCc aacc 1紫缺:1紫马:1绿缺:1绿马

第6章课后答案汇总

6.1解: 1.计算截面特征值 工字形截面A=20?500?2+12?450=25400mm2 I x=500?4903/12-488?4503/12=11.9629?108mm4; I y=2?5003?20/12=4.1667?108mm4 mm4; i x=217mm;i y=128mm; 2.刚度验算 λx=6000//217=27.65;λy=46.88 λx、λy<[λ] 刚度满足要求 3.强度验算 因无截面稍弱无需验算截面强度 4.整体稳定验算: 焊接工字形截面翼缘焰切边x、y轴都属于b类截面 ?min=?y=0.8704 σ=N/?A=4500?103/(0.8704?25400) =203.54N/mm2

刘祖洞遗传学习题答案6

第六章 染色体和连锁群 1、在番茄中,圆形(O )对长形(o )是显性,单一花序(S )对复状花序(s )是显性。这两对基因是连锁的,现有一杂交 得到下面4种植株: 圆形、单一花序(OS )23 长形、单一花序(oS )83 圆形、复状花序(Os )85 长形、复状花序(os )19 问O —s 间的交换值是多少? 解:在这一杂交中,圆形、单一花序(OS )和长形、复状花序(os )为重组型,故O —s 间的交换值为:%20%10019 85832319 23=?++++= r 2、根据上一题求得的O —S 间的交换值,你预期 杂交结果,下一代4种表型的比例如何? O_S_ :O_ss :ooS_ :ooss = 51% :24% :24% :1%, 即4种表型的比例为: 圆形、单一花序(51%), 圆形、复状花序(24%), 长形、单一花序(24%), 长形、复状花序(1%)。 3、在家鸡中,白色由于隐性基因c 与o 的两者或任何一个处于纯合态有色要有两个显性基因C 与O 的同时存在,今有下列的交配: ♀CCoo 白色 × ♂ccOO 白色 ↓ 子一代有色

子一代用双隐性个体ccoo 测交。做了很多这样的交配,得到的后代中,有色68只,白色204只。问o —c 之间有连锁吗?如有连锁,交换值是多少? 解:根据题意,上述交配: ♀ CCoo 白色 ccOO 白色 ♂ ↓ 有色CcOo ccoo 白色 ↓ 有色C_O_ 白色(O_cc ,ooC_,ccoo ) 416820468=+ 4 3 68204204=+ 此为自由组合时双杂合个体之测交分离比。 可见,c —o 间无连锁。 (若有连锁,交换值应为50%,即被测交之F1形成Co :cO :CO :co =1 :1 :1 :1的配子;如果这样,那么c 与o 在连锁图上相距很远,一般依该二基因是不能直接测出重组图距来的)。 4、双杂合体产生的配子比例可以用测交来估算。现有一交配如下: 问:(1)独立分配时,P=? (2)完全连锁时,P=? (3)有一定程度连锁时,p=? 解:题目有误,改为:)2 1( )21 (aabb aaBb Aabb AaBb p p p p -- (1)独立分配时,P = 1/4; (2)完全连锁时,P = 0; (3)有一定程度连锁时,p = r /2,其中r 为重组值。 5、在家鸡中,px 和al 是引起阵发性痉挛和白化的伴性隐性基因。今有一双因子杂种公鸡 al Px Al px 与正常母鸡交配,孵出74只小鸡,其中16只是白化。假定小鸡没有一只早期死亡,而px 与al 之间的交换值是10%,那么在小鸡4周龄时,显出阵发性痉挛时,(1)在白化小鸡中有多少数目显出这种症状,(2)在非白化小鸡中有多少数目显出这种症状? 解:上述交配子代小鸡预期频率图示如下: ♀W Al Px al Px Al px ♂

第六章课后习题答案

第六章习题 (二)填空题 1 . MCS-51可提供程序和数据两种存储器、最大存储空间可达64K 的两个并行存储器扩展系统。 2. 为扩展存储器而构造系统总线,应以P0口的8位口线作为低位地址/数据线,以P2口的口线作为高位地址。 3. 在存储器编址技术中,不需要额外增加电路,但却能造成存储器映象区重叠的编址方法是线选法,能有效利用存储空间适用于大容量存储器扩展的编址方法是译码法。 4. 为实现内外程序存储器的衔接,应使用EA 信号进行控制。 5. 访问内部RAM使用MOV 指令,访问外部RAM使用MOVX指令,访问内部ROM 使用MOVC 指令,访问外部ROM使用MOVC 指令。 6. 与微型机不同,单片机必须具有足够容量的程序存储器是因为没有保存程序的外部设备。 7. 在存储器扩展中,无论是线选法还是译码法,最终都是为扩展芯片的片选端提供信号。 8. 在接口电路中,把已经编址并能进行读写操作的寄存器称为口或端口。 9. 从单片机的角度上看,连接到数据总线上的输出口应具有锁存功能,连接到数据总线上的输入口应具有三态缓冲功能。 10. 在三态缓冲电路中,除了数据输入线和数据输出线外,还应当有一个三态控制信号线。 11. 在MCS-51单片机系统中,采用的编址方式是统一编址方式。 12. 在单片机中,为实现数据的I/O传送,可使用3种控制方式,即无条件传送方式、查询方式和中断方式。 13. 在查询和中断两种数据输入输出控制方式中,效率较高的是中断方式。 14. 在多位LED显示器接口电路的控制信号中,必不可少的是段控信号和位 控信号。 15. 简单输入口扩展是为了实现输入数据的缓冲功能,而简单输出口扩展是为了实现输出数据的锁存功能。 16. 8255A能为数据I/O操作提供A、B、C 3个8位口,其中A口和B口只能作为数据口使用,而C口则既可作为数控口使用,又可作为控制口使用。 17. 与8255A比较,8155的功能有所增强,主要表现在8155具有256 单元的RAM 和一个14 位的定时器/计数器。 (三)选择题 1.在MCS-51中,需双向传递信号的是 (A)地址线(B)数据线(C)控制信号线(D)电源线2.在MCS-51中,为实现P0口线的数据和低位地址复用,应使用 (A)地址锁存器(B)地址存储器 (C)地址缓冲器(D)地址译码器 3.在下列信号中,不是给程序存储器扩展使用的是 (A)PSEN (B)EA (C)ALE (D)WR 4.在下列信号中,不是给程序存储器扩展使用的是 (A)EA(B)RD (C)WR (D)ALE

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