电子科技18春《大学英语1(专科)》在线作业123答案

电子科技18春《大学英语1(专科)》在线作业123答案
电子科技18春《大学英语1(专科)》在线作业123答案

(单选题) 1: The lines in her face have been earned one _______.

A: at one time

B: for one time

C: at a time

D: for a time

正确答案: C

(单选题) 2: I regretted _______ taken a bath and dressed in my Sunday best.

A: having not

B: not have

C: have not

D: not having

正确答案: D

(单选题) 3: If someone had the fine things all above his fortune, he would have_______ debt. A: involved

B: running into

C: involving

D: run into

正确答案: D

(单选题) 4: _______their degrees, they refuse to do what they think is “low”work.

A: As a result of

B: As a result

C: As a matter

D: As a matter of fact

正确答案: A

(单选题) 5: Such a company collects _______ information about such man or woman.

A: a great number of

B: a great many

C: a great deal

D: a great deal of

正确答案: D

(单选题) 6: My sisters and brothers asked me _______ I had paid for the whistle.

A: how much

B: how many

C: how was

D: however

正确答案: A

(单选题) 7: So the young people are encouraged to ________ such companies _______ a perfect match.

B: paid…for

C: pay…to

D: paid…to

正确答案: A

(单选题) 8: It was always on at the same time every day _______ Saturday and Sunday. A: except for

B: besides

C: except that

D: except

正确答案: A

(单选题) 9: She has worked ______that body and face for more than sixty years.

A: for

B: on

C: to

D: with

正确答案: B

(单选题) 10: In wanting nothing, he _______ nothing.

A: need

B: need for

C: lacks

D: lack

正确答案: C

(单选题) 11: We are even told _______ is our duty to clean the classroom.

A: that

B: it

C: who

D: whom

正确答案: B

(单选题) 12: It is an exciting experience just _______ down a New York street.

A: walking

B: being going

C: to walk

D: to be going

正确答案: C

(单选题) 13: We laughed and cheered, ________ our victory over the white in the fight. A: celebrated

B: celebration

D: having celebrated

正确答案: C

(单选题) 14: . I managed those four years _______ ever having a friend visit my house.

A: with

B: within

C: without

D: of .

正确答案: C

(单选题) 15: Actually, the busier he is, _______ he feels.

A: happier

B: the happy

C: the happier

D: happier more

正确答案: C

(单选题) 16: They were always looking for a house just a little better ________ the place we were living _______.

A: more as…in

B: than…on

C: as…on

D: than…in

正确答案: D

(单选题) 17: I watched him from the _______ of my eye.

A: side

B: corner

C: light

D: outside

正确答案: B

(单选题) 18: The sharp hearing of a fish _______ by two scientists.

A: have been proved

B: have proved

C: has proved

D: has been proved

正确答案: D

(单选题) 19: Louis keeps _______ the blows to him.

A: fight

B: raining

C: beating

D: box

正确答案: B

(单选题) 20: It is reported that the fish can _______the difference between colors.

A: tell

B: make

C: say

D: talk

正确答案: A

(单选题) 21: The pupils laughed and shouted _______ they played ball games in the schoolyard or _______ the stadium.

A: when…at

B: that…in

C: as…on

D: while…in

正确答案: A

(单选题) 22: The King cried, “I command that all spindles in my kingdom _______ burned!”A: are to be

B: will be

C: be

D: shall be

正确答案: C

(单选题) 23: He was paid _______ the rate of 6 dollars a day.

A: in

B: with

C: on

D: at

正确答案: D

(单选题) 24: —You don't have to have the radio so loud, do you? —____________

A: Oh, that's nothing.

B: It's very kind of you to say so.

C: Oh, I do apologize.

D: Be careful.

正确答案: C

(单选题) 25: She had carried home her babies who were _______ sleepy to walk.

A: too

B: to

C: so

D: such

(单选题) 26: The USA ______ a great advanced country without the labor of the newcomers.

A: could become

B: can become

C: couldn’t have become

D: couldn’t become

正确答案: C

(单选题) 27: He dropped the pennies _______ the two dimes I had hidden in my hand.

A: out with

B: in

C: in with

D: with

正确答案: C

(单选题) 28: —Thanks a lot. You've gone through so much trouble. —____________

A: I don't think it's a trouble.

B: That's good.

C: It's no trouble at all.

D: That's very kind of you.

正确答案: C

(单选题) 29: On the quiet waters ________ a dark outline of the Statue of Liberty under the pale moonlight.

A: are cast

B: is cast

C: were cast

D: being cast

正确答案: B

(单选题) 30: He often ________ ideas and even “stole”most of his clothes from others.

A: borrowed

B: lent

C: borrow

D: lend

正确答案: A

(单选题) 31: The king’s daughter saw an old blind woman ______ a stick around between her hands.

A: to turn

B: turning

C: being turning

D: turned

(单选题) 32: —Shall we have another cup of tea? —____________

A: Do you like tea?

B: Why not?

C: Good tea.

D: I'm thirsty.

正确答案: B

(单选题) 33: His favorite saying was “Do not do to others _______ you would not have them to do to you.

A: what

B: who

C: which

D: that

正确答案: A

(单选题) 34: His father _______ shout at his mother, ________ couldn’t do anything to change the conditions.

A: used to… which

B: was used to…whom

C: used to…who

D: was used to… that

正确答案: A

(单选题) 35: What was the use of having such high heels, when people seemed to _______ a blind eye to them.

A: give

B: turn

C: make

D: take

正确答案: B

(单选题) 36: A good command of English depends upon ________ practice.

A: a lot of

B: a great deal

C: a number of

D: a good many

正确答案: A

(单选题) 37: The child _______ cold if he had put on more clothes.

A: were to catch

B: should catch

C: wouldn’t have caught

正确答案: C

(单选题) 38: —____________ —Thank you, I certainly will.

A: Happy birthday to you.

B: Let me help you with your Math.

C: Please remember me to your mum.

D: Don't forget to post the letter.

正确答案: C

(单选题) 39: He _______ his hat on the side of his head like an Englishman and hurried back. A: take

B: wore

C: dressed

D: made up

正确答案: B

(单选题) 40: He put his hands in the worn-out jeans and took out _______ pennies.

A: a handful of

B: the hand of

C: a hand of

D: the handful of

正确答案: A

(单选题) 41: We grew _______ as the fight was coming to an end.

A: having uneasy

B: be uneasy

C: to uneasy

D: uneasy

正确答案: D

(单选题) 42: The pride of his color was in his ________.

A: voice

B: sound

C: loud

D: quiet

正确答案: A

(单选题) 43: I should have gone to the opera yesterday. It was very good. I wish I _____ yesterday off.

A: have had

B: had

C: have

D: had had

(单选题) 44: With a good command of reading skills, most students can manage to read ______ as they could the year before.

A: as twice fast

B: as fast as twice

C: as twice as fast

D: twice as fast

正确答案: D

(单选题) 45: She must arrange to lose time _______, but not to lose her jo##

A: for work

B: at work

C: in work

D: on work

正确答案: B

(单选题) 46: Who is responsible _______ the education of the children?.

A: to

B: on

C: at

D: for

正确答案: D

(单选题) 47: Their son dreamed that he could succeed _______ they had failed.

A: when

B: while

C: where

D: that

正确答案: C

(单选题) 48: As soon as the ship docks,the passengers _______ to land.

A: were allowed

B: allowed

C: will allow

D: will be allowed

正确答案: D

(单选题) 49: The porter helped Mark Twain a lot, so he gave him _______he usually paid for a porter.

A: as twice more as

B: twice as much as

C: twice as many as

D: as twice much as

(单选题) 50: If the story ended there, one could say that the fish _______ itself by change.

A: had freed

B: has freed

C: were freed

D: was freed

正确答案: A

(单选题) 1: They were always looking for a house just a little better ________ the place we were living _______.

A: more as…in

B: than…on

C: as…o n

D: than…in

正确答案: D

(单选题) 2: He never laughs ______ people when they are ______ trouble.

A: to… in

B: at… in

C: at… at

D: to… at

正确答案: B

(单选题) 3: No matter _______ he says, I do not believe him.

A: whether

B: if

C: what

D: when

正确答案: C

(单选题) 4: He spent the whole morning _______ for the coming exam.

A: to preparing

B: having prepared

C: preparing

D: being prepared

正确答案: C

(单选题) 5: It is reported that the fish can _______the difference between colors.

A: tell

B: make

C: say

D: talk

正确答案: A

(单选题) 6: Her eyes have shone with pride, _______ tears of bitterness and burned from lack of sleep.

A: filling with

B: to fill with

C: having filled with

D: filled with

正确答案: D

(单选题) 7: In fact, to work with one’s hands is thought to be dirty and ______ in such countries. A: ashamed

B: shameful

C: shame

D: shameless

正确答案: B

(单选题) 8: On the quiet waters ________ a dark outline of the Statue of Liberty under the pale moonlight.

A: are cast

B: is cast

C: were cast

D: being cast

正确答案: B

(单选题) 9: The USA ______ a great advanced country without the labor of the newcomers.

A: could become

B: can become

C: couldn’t have become

D: couldn’t become

正确答案: C

(单选题) 10: The new comers brought _______ not only different ways of life, but also with something else.

A: in them

B: with

C: with them

D: in

正确答案: C

(单选题) 11: It is an exciting experience just _______ down a New York street.

A: walking

B: being going

C: to walk

D: to be going

正确答案: C

(单选题) 12: Actually, the busier he is, _______ he feels.

A: happier

B: the happy

C: the happier

D: happier more

正确答案: C

(单选题) 13: These examples will tell you _______ a polite man should do and what he shouldn’t A: what

B: that

C: who

D: where

正确答案: A

(单选题) 14: And while I am going to school I want a wife _______ my children.

A: looking after

B: to look after

C: looking about

D: to look about

正确答案: B

(单选题) 15: His face was covered with the dust which _______ out of the ceiling during the night.

A: has fallen

B: had fallen

C: was falling

D: were falling

正确答案: B

(单选题) 16: It was very funny. The words stood _______ , and didn’t move as they _______ on a TV.

A: still…do

B: quietly (i)

C: still (i)

D: quietly…do

正确答案: C

(单选题) 17: When I saw another _______ for being famous, I thought he paid too dear for his whistle.

A: full of love

B: in love

C: being love

D: loved

正确答案: B

(单选题) 18: I am thankful none of us children ever ________ our parents _______the poor living conditions.

A: blamed… for

B: blamed…on

C: blamed… to

D: blamed…at .

正确答案: A

(单选题) 19: In 1911 a penniless young man left England _______ America.

A: to

B: for

C: at

D: over

正确答案: B

(单选题) 20: We grew _______ as the fight was coming to an end.

A: having uneasy

B: be uneasy

C: to uneasy

D: uneasy

正确答案: D

(单选题) 21: She will not _______ when I talk about the things that interest me and my friends. A: get on

B: inserts

C: speak at

D: cut in

正确答案: D

(单选题) 22: He is unable to go to work _______ the fall from his bike.

A: as a result

B: as a matter

C: as a result of

D: as a matter of

正确答案: C

(单选题) 23: And practice needs great effort and _______ much time.

A: gets

B: spends

C: takes

D: pays

正确答案: C

(单选题) 24: His father died _______ drink.

A: in

B: of

C: as

D: for

正确答案: B

(单选题) 25: The beggar kept wandering why the rich men with so much money were never________.

A: satisfied

B: satisfying

C: satisfy

D: satisfaction

正确答案: A

(单选题) 26: Nancy isn’t here. It’s my fault. I forgot all about _______ her.

A: to telephone

B: to telephone to

C: telephoning

正确答案: A

(单选题) 27: Her legs got _______while teaching her daughter to ride a two wheeler.

A: beat up

B: beat down

C: beat

D: beat over

正确答案: A

(单选题) 28: That story you have just told _______ me of the experience I once had..

A: recalls

B: reminds

C: remembers

D: reviews

正确答案: B

(单选题) 29: When people _______ for a bus, or in a post office, he takes his turn.

A: are waiting

B: wait

C: waited

D: were waiting

正确答案: A

(单选题) 30: The Great Wall ran _______ high mountains and deep valleys.

A: of

B: up

C: over

D: to

正确答案: C

(单选题) 31: Education is entirely _______cost in that school.

A: free about

B: free for

C: free of

D: free with

正确答案: C

(单选题) 32: Professor, would you slow down a bit, please? I can't ______ you.

A: make up to

B: put up with

C: keep up with

D: hold on to

正确答案: C

(单选题) 33: Margie _______ her diary almost every day.

A: kept

B: go on

C: keep

D: had

正确答案: A

(单选题) 34: His favorite saying was “Do not do to others _______ you would not have them to do to you.

A: what

B: who

C: which

D: that

正确答案: A

(单选题) 35: —Shall we have another cup of tea? —____________

A: Do you like tea?

B: Why not?

C: Good tea.

D: I'm thirsty.

正确答案: B

(单选题) 36: —Can you go to the concert with us this evening? —____________

A: No, I already have plans.

B: NO, I really don’t like being with you

C: I’d love to, but I am busy tonight.

D: I’m ill, so I shouldn’t go out.

正确答案: C

(单选题) 37: The Chinese family came to include _______ children and their parents _______ their uncles and aunts..

A: not only…but

B: both…and

C: either…or

D: neither…nor

正确答案: A

(单选题) 38: I regretted _______ taken a bath and dressed in my Sunday best.

A: having not

B: not have

C: have not

D: not having

正确答案: D

(单选题) 39: “Niggers are dirty,”he said. “_______ mud,”said I. “And I am not as dirty as you, yet.”

A: It is

B: That is

C: So is

D: Nor is

正确答案: C

(单选题) 40: My sisters and brothers asked me _______ I had paid for the whistle.

A: how much

B: how many

C: how was

D: however

正确答案: A

(单选题) 41: Now certain companies can help a young person _______ the right husband or wife. A: in search

B: on search

C: in search of

D: on search of

正确答案: C

(单选题) 42: If no one cleaned our streets and _______the rubbish away from our houses, we should get diseases in our towns.

B: brought

C: move

D: took

正确答案: D

(单选题) 43: She didn’t like her picture book _______ , so she threw it away.

A: not more

B: no longer

C: any longer

D: no more

正确答案: C

(单选题) 44: Louis keeps _______ the blows to him.

A: fight

B: raining

C: beating

D: box

正确答案: B

(单选题) 45: They learned the same things, so they could help _______their homework and talk about it.

A: one another with

B: one other with

C: one another for

D: each other for

正确答案: A

(单选题) 46: I’m ashamed of _______ I did.

A: which

B: that

C: as

D: what

正确答案: D

(单选题) 47: She has worked ______that body and face for more than sixty years.

A: for

B: on

C: to

D: with

正确答案: B

(单选题) 48: The pride of his color was in his ________.

A: voice

C: loud

D: quiet

正确答案: A

(单选题) 49: —Thanks a lot. You've gone through so much trouble. —____________

A: I don't think it's a trouble.

B: That's good.

C: It's no trouble at all.

D: That's very kind of you.

正确答案: C

(单选题) 50: There had been a number of walls ________ brick and stone alone the northern border.

A: build in

B: built

C: building

D: built of

正确答案: D

(单选题) 1: On the quiet waters ________ a dark outline of the Statue of Liberty under the pale moonlight.

A: are cast

B: is cast

C: were cast

D: being cast

正确答案: B

(单选题) 2: My first job ______for four years, my second for ten, my third for seven.

A: took

B: lasted

C: take

D: spent

正确答案: B

(单选题) 3: This story did not happen during the Depression; this was ________ and early 70’s. A: in late 60

B: in the late 60

C: in the late 60’s

D: in late 60’s

正确答案: C

(单选题) 4: Margie _______ her diary almost every day.

A: kept

B: go on

D: had

正确答案: A

(单选题) 5: No matter _______ he says, I do not believe him.

A: whether

B: if

C: what

D: when

正确答案: C

(单选题) 6: The more often a fish is nearly caught, _______ it will be to interest it next time.

A: less difficult

B: the more difficult

C: the difficult

D: more difficult

正确答案: B

(单选题) 7: In short, the sufferings of mankind are largely _______ their putting a false value on things.

A: due to

B: because

C: but

D: at

正确答案: A

(单选题) 8: She must arrange to lose time _______, but not to lose her jo##

A: for work

B: at work

C: in work

D: on work

正确答案: B

(单选题) 9: The emperor combined these walls into one _______ wall.

A: continue

B: continuous

C: connection

D: connected

正确答案: B

(单选题) 10: —Do you like to play basketball? —____________

A: Perhaps.

B: No, Xiao Wang does not like it.

C: I am pleased about it.

D: I am crazy about it.

正确答案: D

(单选题) 11: If he, by accident, knocks someone, or _______ their way, he say “Excuse me”or “I’m sorry”.

A: gets on

B: gets in

C: gets by

D: gets to

正确答案: B

(单选题) 12: In the very early days, China ________ and ruled by many kings.

A: divided

B: was divided

C: is divided

D: divides

正确答案: B

(单选题) 13: That evening I looked for gifts _______ just fulfilling a duty.

A: instead that

B: instead of

C: instead

D: instead with

正确答案: B

(单选题) 14: “Niggers are dirty,”he said. “_______ mud,”said I. “And I am not as dirty as you, yet.”

A: It is

B: That is

C: So is

D: Nor is

正确答案: C

(单选题) 15: I watched him from the _______ of my eye.

A: side

B: corner

C: light

D: outside

正确答案: B

(单选题) 16: The last inch of space was filled, yet people kept on pushing _______ in along the walls of the store.

A: them

B: yourself

C: ourselves

D: themselves

正确答案: D

(单选题) 17: The child _______ cold if he had put on more clothes.

A: were to catch

B: should catch

C: wouldn’t have caught

D: caught

正确答案: C

(单选题) 18: _______their degrees, they refuse to do what they think is “low”work.

A: As a result of

B: As a result

C: As a matter

D: As a matter of fact

正确答案: A

(单选题) 19: Think of ________ a small child does when he begins to learn his mother tongue. A: that

B: if

C: what

D: which

正确答案: C

(单选题) 20: —Sorry for having kept you waiting for so long. My car broke down. —____________

A: That's all right.

B: I don't care.

C: I can't bear it any more.

D: It's my pleasure.

正确答案: A

(单选题) 21: He came into the room and found her, the sleeping beauty, ________ on the floor. A: to lie

B: to lying

C: lay

D: lying

正确答案: D

(单选题) 22: Actually, the busier he is, _______ he feels.

A: happier

B: the happy

C: the happier

123章电路理论习题

复习思考题(第1章) 1-1 根据图1-42所示参考方向和数值确定各元件的电流和电压的实际方向,计算各元件的功率并说明元件是吸收功率还是发出功率。 (a) (b) (c) (d) 图1-42 题1-1的图 1-2 在图1-43所示电路中 (1)元件A吸收10W功率,求其电压U a; (2)元件C吸收-10W功率,求其电流i c; (3)元件E发出10W功率,求其电流i e; (4)元件G发出10mW功率,求其电流i g; (1) (2) (3) (4) 图1-43 题1-2的图 1-3 电路如图1-44所示,求各电路中所标出的未知量u、i、R 或P的值。 图1-44 题1-3的图 1-4 已知电容元件电压u的波形如图题1-45(b)所示,(1)试求i(t)并绘出波形图;(2)若已知的是其电流i的波形如图题1-45(c),所示设u(0)= 0V,试求u(t),(0 t),并绘出波形图

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定额作业答案(修改)123

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练习题一 一、单项选择题: 1.()限制了估价报告书的用途。 A、估价方法 B、估价目的 C、估价原则 D、估价日期 参考答案:B 2.现行的土地权属证书有() A、《国有土地所有证》; B、《国有土地使用证》; C、《集体土地所有证》; D、《集体土地使用证》。 参考答案:BCD 3. 中国房地产估价师学会简称为()。 A、IRCEA B、CAIRE C、CIREA D、CEIRA 参考答案:C 4. 政府举行土地使用权拍卖出让,有意购买者可以委托房地产估价人员为其评估能够承受的最高购买价格,这也是一种( )。A.市场价值评估 B.投资价值评估 C.原始价值评估 D.账面价值评估 参考答案:B 解析:就投资价值与市场价值相对而言,房地产估价所评估的是房地产的市场价值。但作为房地产估价人员,评估投资价值或提供房地产市场分析报告、房地产投资项目可行性研究报告,也是其服务的重要领域。 5. 第一个房地产投资者对房地产都有一个心理价位,投资价值可以看成是这个心理价位,当( )低于其心理价位时,投资者趋向于增加投资;相反,他们将向市场出售过去的房地产。A.市场价格 B.投资价格C.使用价格 D.交换价格 参考答案:A 解析:投资者评估的房地产的投资价值,或者说消费者对房地产的评价,大于或等于该房地产的市场价格,是其投资行为或交易能够实现的基本条件。当投资价值大于市场价格时,说明值得投资购买;反之,说明不值得投资购买。 6. ( )是随着时间的推移而减少的。A.原始价值 B.账面价值C.市场价值 D.投资价值 参考答案:B 解析:原始价值是始终不变的;账面价值是随着时间的推移而减少的;市场价值是随着时间的推移而变化的,有时高,有时低。市场价值很少等于账面价值。 7. ( )是指某种房地产在市场上的一般、平均水平价格,是该类房地产大量成交价格的抽象结果。 A. 原始价格 B.理论价格C.成交价格 D.市场价格 参考答案:D 解析:市场价格是指某种房地产在市场上的一般、平均水平价格,是该类房地产大量成交价格的抽象结果。 8. 楼面地价又称单位建筑面积地价,楼面地价与土地总价的关系为( )。 A.楼面地价;土地总价÷总建筑面积B.楼面地价:土地总价x总建筑面积C.楼面地价:土地总价+总建筑面积D. 楼面地价:总建筑面积÷土地总价 参考答案:A 9. 合法原则要求房地产估价应以( )为前提进行。 A.最高最佳使用原则B.公平原则C.估价对象的合法权益 D. 替代原则 参考答案:C 解析:两宗实物状况相同的房地产,如果权益不同,价值会有所不同。 10. 收益递增递减原理可以帮助我们确定( )。 A.最佳用途和最佳规模 B.最佳约度C.最佳规模和最佳约度 D.最佳用途 参考答案:C 解析:它揭示的是两种投入产出关系:一种是在一种投入量变动而其他投入量固定的情况下的投入产出关系;另一种是在所有的投入量都变动的情况下的投入产出关系。 11. ( )是评估房地产价格的时间界限,例如,政府有关房地产的法律、法规、政策、参考、税收等的发布、变更、实施日期等,均有可能影响估价对象的价格,因此,在估价时是采用发布、变更、实施日期之前的还是之后的,就应根据它不确定。A,估价时点 B.估价目的 C.估价区位 D.估价权益 参考答案:A 解析:估价不是求取估价对象在某一个时间上的价格,这既没有必要也不可能。 二、多项选择题: 1. 房地产之所以有价格,其前提条件是( )。A.房地产的有用性 B.房地产的稀缺性C.房地产的有效供给 D.房地产的有效需求 参考答案:A, B, D 解析:房地产之所以有价格,与其他任何商品为什么有价格一样,需要具备3个条件:①有用性;②稀缺性;③有效需求。 2. 成交价格简称成交价,是交易双方实际达成交易的价格。它是一个已完成的事实这种价格通常随着 ( )的不同而不同。A.交易者的心态 B.交易者的偏好C.交易者对市场了解程度 D.讨价还价能力 参考答案:A, B, C, D 解析:成交价格可能是正常的,也可能是不正常的,所以,可将成交价格区分

中考数学答案123

16 、选择题 1. (4分) 如图是由5个大小相同的正方体组成的几何体, 则该几何体的主视图是 ( ) 故选:A . 【点评】本题考查由三视图判断几何体, 简单组合体的三视图. 由几何体的俯视图及小正方 形内的数字,可知主视图的列数与俯视数的列数相同, 且每列小正方形数目为俯视图中该列 小正方形数字中的最大数字. 左视图的列数与俯视图的行数相同, 且每列小正方形数目为俯 视图中相应行中正方形数字中的最大数字. 反比例函数是y=Z 的图象在( A ?第一、二象限 B ?第一、三象限 C .第二、三象限 D ?第二、四象限 【分析】直接根据反比例函数的性质进行解答即可. 【解答】 解:???反比例函数是yi 中,k=2 >0, ???此函数图象的两个分支分别位于一、三象限 故选B . 【点评】本题考查的是反比例函数的性质,熟知反比例函数 当k >0,双曲线的两支分别位于第一、第三象限,在每一象限内 答此题的关键. 3 △ DEF ,若△ ABC 与厶DEF 的相似比为三■,则△ ABC 与厶DEF 4 中考数学试 参考答案与试题解析 【解答】解:观察图形可知,该几何体的主视图是 2. ( 4 分) y 随x 的增大而减小是解 3. ( 4 分) 已知△ ABC s 对应中线的比为( ) (k^0)的图象是双曲线;

A3D 4^ 9 IE A . -B. —c. — D.— 16 【分析】根据相似三角形的对应中线的比等于相似比解答.

6. (4 分) 如图,在△ ABC 中, DE // BC , AD =2 DB =3 ,则 AE EC 【解答】 解:???△ ABC DEF , △ ABC 与厶DEF 的相似比为色, 4 ???△ ABC 与厶DEF 对应中线的比为色, 4 故选:A . 【点评】本题考查的是相似三角形的性质, 相似三角形周长的比等于相似比; 相似三角形面 积的比等于相似比的平方; 相似三角形对应高的比、 对应中线的比、对应角平分线的比都等 于相似比. A . 4 B . 6 C . 8 D . 10 【分析】在直角三角形 ABC 中,利用锐角三角函数定义表示出 sinA ,将sinA 的值与BC 的 长代入求出AB 的长即可. 【解答】 解:在 Rt △ ABC 中,/ C=90° sinA=Z 二=亠,BC=6 , AB 5 I LC I ? AB= = =10, sinA ' 5 【点评】此题考查了解直角三角形,熟练掌握锐角三角函数定义是解本题的关键. 2 5. ( 4分) 一元二次方程X 2+2X +仁 0的根的情况( ) A .有一个实数根 B .有两个相等的实数根 C .有两个不相等的实数根 D .没有实数根 【分析】先求出△的值,再根据△> 0?方程有两个不相等的实数根; △ =0?方程有两个相 等的实数;△< 0?方程没有实数根,进行判断即可. 【解答】解:?/ △ =22- 4 XI X1=0, ? 一元二次方程X 2+2X +1=0有两个相等的实数根; 故选B . 【点评】此题主要考查了一元二次方程根的情况与判别式 △的关系: (1) △>0?方程有两个不相等的实数根; (2) △ =0?方程有两个相等的实数根; (3) △ < 0?方程没有实数根. 4. (4 分) 在 Rt △ ABC 中, / C=90 ° sinA 壬 ,BC=6,贝U AB=( 故选D

金融风险课后习题整理123章

第一章 1.简述金融风险含义的含义、特点和主要类型 金融风险是指金融变量的变动所引起的资产组合未来收益的不确定性。(正收益也有可能是风险、不确定性即是风险、方差度量法度量) 金融风险具有不确定性,客观性,主观性,叠加性和累积性,消极性和积极性并存的特点。 金融风险的类型:按照能否分散,可以分为系统风险和非系统风险。按照会计标准,能分为会计风险和经济风险。按照驱动因素,能分为市场风险、信用分析、操作风险、流动性风险、其他风险(经营、国家、关联风险)等。 2.试对金融风险的诱因和有可能导致的经济结果进行阐释和分析 诱因:未来收益有可能受金融变量变动影响的那部分资产组合的资金头寸称为风险暴露。金融风险来源于风险暴露以及影响资产组合未来收益的金融变量变动的不确定性。(暴露是风险资产的一种状态。风险是可能性)。不确定是金融风险产生的根源(内在和外在即非系统和系统) 可能导致的结果:金融风险利弊共存,不良影响有:(1)可能会给微观经济主体带来直接或潜在的经济损失。(2)影响投资者的预期收益。(3)增大了交易和经营管理成本(4)可能会降低部门生产率和资金利用率。(5)可能会引起一国经济增长、消费水平和投资水平的下降。(6)影响一国的国际收支。(7)可能会造成产业结构部合理,社会生产力水平下降,甚至引起金融市场秩序混乱,对经济产生严重破坏。(8)对宏观经济政策的制定和实施也产生重大影响。(4个微观,4个宏观) 3.辨析金融风险与预期损失、未预期损失、经济资本、监管资本之间的关系 金融风险的经济资本是与金融机构实际承担的风险直接对应、并随着机构实际承担的风险大小而变化的资本,是由金融机构基于追求股东价值最大化的理念对风险、收益、资本综合考虑的基础上所确定的。 金融风险的监管资本是指监管部门针对有可能发生的风险而要求金融机构必须备足的资本。(核心资本和附属资本) 预期损失是实现可以预计的平均损失,一般视为金融机构的业务成本之一,以计提准备

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