Cloze-Test(1)

Cloze-Test(1)
Cloze-Test(1)

T est 1

The nature of light is not wholly known, but it is generally believed to be matter, as in its (1) _______, it obeys the laws (2) _______ matter.so closely is it connected with heat and electricity that there can be (3) _______ doubt of their all being (4) _______ different modifications of the same substance. The effects of light(5) _______ other bodies and how light is affected by them (6) ______ some important principles.

Rays of light are reflected from one surface to (7) _______. It is by this reflection of light that objects are (8) _______ visible. However, unless light falls directly (9) _______ the eye they are invisible, and are not (10) _______ felt until after a certain series of operations upon the various coverings of the eye. Smooth and (11) _______ surfaces reflect light most powerfully, and send to the eye the images of the objects (12) _______ the light proceeded before reflection. Glass would be of no use to us as a mirror, were it not first (13) _______ on one side, interrupting the rays in their (14) _______ from the glass into the air. The reason why trees, rocks and animals are not all mirrors is that their surfaces are (15) _______, and rays of light reflected from such a surface are (16) _______ in every direction. Stand before a mirror and your image is formed and appears to be as far (17) _______ the glass as you are before it. Rays of light (18) _______ reflected at the same (19) _______ at which they fall upon a mirror, two persons can stand in (20) _______ position that each can see the image of the other without seeing his own.

1.[A] actions [B] moves [C] motions [D] motives

2. [A] regulating [B] organizing [C] supervising [D] mofifying

3. [A] some [B] great [C] few [D] little

4. [A] but [B] still [C] hardly [D] narrowly

5. [A] for [B] in [C] with [D] on

6. [A] change [B] involve [C] depend [D] use

7. [A] other [B] the others [C] the other [D] another

8. [A] used [B] served [C] made [D] showed

9. [A] upon [B] in [C] off [D] down

10. [A] rationally [B] sensibly [C] consciously [D] reasonably

11. [A] shiny [B] clean [C] polished [D] flat

12. [A] that [B] when [C] with which [D] from which

13. [A] coated [B] painted [C] drawn [D] overlapped

14. [A] trail [B] lane [C] path [D] passage

15. [A] unequal [B] uneven [C] irregular [D] unstable

16. [A] diffused [B] spread [C] scattered [D] separated

17. [A] back [B] in front of [C] behind [D] beside

18. [A] / [B] are [C] were [D] be

19. [A] way [B] angle [C]point [D] form

20. [A] such [B] quite a [C] so much a [D] /

T est 2

Interruption, more surely than anything else, kills conversation. The best of talkers interrupt (1) _______ in conversation. However, the (2) _______ interruption of the habitual interrupter and the unintentional, conscious interruption of the (3) _______ talkers are two very different things. All habitual interrupters are totally unaware that they continually (4) _______ speeches of their conversers and literally knock their very words back (5) _______ their mouths.

Inability to (6) _______ is responsible for one phase of interruption to conversation. It is the (7) _______ eye that tells one's words have not been heard. "The person next to you must be (8) _______ by my conversation, for it is going into one of your ears and out of the other," said a talker to an inattentive dinner-companion whose absent-minded and (9) _______ replies had been snapping the thread of the thought (10) _______ it grew intolerable.

Because it often (11) _______ from kind thought as from arrogance, sometimes we can see a (12) _______ undesirable phase of interruption takes place when conversationalist is so anxious to prove his quickness of perception (13) _______ he assumes to know what you are going to say before you have finished your sentence in your own mind. He puts his (14) _______ on your arguments before you are (15) _______ stating them. His interpretation is (16) _______ often exactly the opposite of your own as it is (17) _______. Right or wrong, the explanation serves only (18) _______ interrupt the sequence of thought. This can hardly prove one's (19) _______; on the contrary, such a habit may be a (20) _______ to one's powers.

1. [A] occasionally [B] frequently [C] regularly [D] repeatedly

2. [A] conscientious [B] unconscious [C] confusing [D] complex

3. [A] cultivated [B] learned [C]literate [D]intimate

4. [A] break through [B] break into [C] break out [D] break away

5. [A] for [B] to [C] from [D] into

6. [A] hear [B] listen [C] speak [D] see

7. [A] wandering [B] blazing [C] bright [D] gloomy

8. [A] tired [B] excite [C] bored [D] surprised

9. [A] tardy [B] late [C] constant [D] subsequent

10. [A] when [B] after [C] until [D] while

11. [A] stands [B] starts [C] rises [D] springs

12. [A] more [B] few [C] little [D] less

13. [A]that [B] though [C] because [D] but

14. [A] statement [B] translation [C] interpretation [D] description

15. [A] completed [B] ended [C] finalized [D] done

16. [A] so [B] as [C] much [D] not

17. [A] equal [B] identical [C] equivalent [D] comparable

18. [A] for [B] to [C] with [D] on

19. [A] modesty [B] diffidence [C] shyness [D] arrogance

20. [A] key [B] credit [C] reason [D] way

T est 3

It is the young man who has the best chance of winning. Then why shouldn't youthfulness be made a (1) ______ asset? If an older man could carry along with him that spirit of youth, he would be prepared (2) _______ incapacity. Our fate hangs on how we (3) _______ ourselves in youth. The world has great need of (4) _______ men. They should become our leaders in the shaping of our policies (5) _______ experience and knowledge.

The very first thought is to keep healthy. Confidence (6) _______ ourselves is considered as the second requirement, (7) _______ our career is short-lived and can hardly succeed. We (8) _______ that one must realize that he is a unique character who is capable of rowing and learning, and (9) _______ his inner self. The (10) _______ of failures come as a result of not being able to trust one's self. (11) _______ we doubt, or acknowledge that we cannot conquer a weakness, we

begin to go downhill.

Most of our troubles in later life started (12) _______ failure to take hold of ourselves when we were young. (13) _______ we carry with us our atmosphere of good will and enthusiasm, we know no defeat. The man who is (14) _______ and lives in a world of doubt seldom achieves more than a(n) (15) _______ living. There have been a few who have groaned their way through to a (16) _______ and sometimes gained success in their life, but (17) _______ that overwhelming number of souls who carry cheer through life, they are as (18) _______ --- mere drops in the bucket. In addition, choose (19) _______ and we will love our work and stick to it closely. Beginning early (20) _______ timidity and builds for success while we are young enough to enjoy the benefits.

1. [A]precious [B] precise [C] permanent [D] possible

2. [A] for [B] on [C] about [D] against

3. [A] conduct [B] construct [C] induct [D] deduct

4. [A] considerate [B] thoughtful [C] attentive [D] considerable

5. [A] by fright of [B] for the sake of [C] in search of [D] at the mercy of

6. [A] by [B] in [C] with [D] for

7. [A] on which [B] that [C] when [D] without which

8. [A] perceive [B] detect [C]discern [D] prospect

9. [A] keep to [B] keep track of [C] keep up with [D] keep in touch with

10. [A] majority [B] group [C] number [D] range

11. [A] The moment which [B] The moment

[C] In the moment [D] At the moment

12. [A] on [B] off [C] up [D] with

13. [A] If only [B] Even if [C] So long as [D] In addition

14. [A] sad [B] dim [C] gloomy [D] obscure

15. [A] empty [B] bare [C] hollow [D] bald

16. [A] competence [B] competition [C] competitor [D] completeness

17. [A] in relation to [B] in reliance on [C] in proportion to [D] in spite of

18. [A] something [B] somebody [C] nothing [D] anything

19. [A] wisely [B] luckily [C] happily [D] bravely

20. [A] takes up [B] takes on [C] takes to [D] takes away

T est 4

Economy, one of the principles of success in the details of housekeeping, consists not alone (1) _______ making advantageous of fresh material, but in carefully (2) _______ and utilizing the "left-over" fragments and bits of food. Few cooks can make (3) _______ perfect calculation respecting the needs of their families as to provide just enough and no more, and the waste of the (4) _______ is in many homes fully equal (5) _______ one half the first cost of the meal. (6) _______ anything need ever be wasted. There are ways of utilizeing almost every kind of cooked food (7) _______ it will be quite as appetizing and nutritious as when first prepared.

All left-over foods, as grains, vegetables, or others of a (8) _______ character, should be removed to clean dishes. (9) _______ this precaution is observed, the tiny bits about the (10) _______ of the dish, which become sour or moldy much sooner than the larger mass, are apt to (11) _______ the whole. They should also be set on ice or be kept in a cool , dry place (12) _______ needed.

There are (13) _______ other foods that can be combined into more delicious dishes than left-over bread if the bread is properly made form (14) _______ material and is well kept in a proper place. To (15) _______ the perfect preservation of the fragments, the (16) _______ itself should receive good care. Broken pieces of bread may become (17) _______ dry, and in that case, they are (18) _______ to crackers for use in soups. In addition, small quantities of left-over grains can be utilized for preparing various kinds of desserts (19) _______ the ingredients require previous cooking. The may also be used in the preparation of vegetable soups, many of which are even (20) _______ by the addition of a few spoonfuls of well-kept cooked oatmeal or rolled oats.

1. [A] of [B]with [C] by [D] in

2. [A] preserving [B] reserving [C] conserving [D] deserving

3. [A] such [B] so [C] very [D] /

4. [A] addition [B] surplus [C] remains [D] supplement

5. [A] on [B] to [C] about [D] of

6. [A] Frequently [B] Scarcely [C] Regularly [D] Occasionally

7. [A] that [B] when [C] in case [D] so that

8. [A] moist [B] damp [C] wet [D]humid

9. [A] While [B] If [C] Unless [D] Meanwhile

10. [A] margins [B] bounds [C] limits [D] edges

11. [A] spoil [B] destroy [C] break [D] ruin

12. [A] when [B] though [C] until [D] for

13. [A] many [B] some [C] little [D] few

14. [A] whole [B] wholesome [C] complete [D] accomplished

15. [A] ensure [B] assure [C] reassure [D] guarantee

16. [A] piece [B] lump [C] loaf [D] chunk

17. [A] sharply [B] frailly [C] snappily [D] crisply

18. [A] favorable [B] preferable [C] desirable [D] beneficial

19. [A] which [B] what [C] where [D] that

20. [A] improved [B] developed [C] worsened [D] impaired

T est 5

Animals do not eat more than their need. They seem to have the (1) _______ to eat what they are hungry. It has been demonstrated that rats will, (2) _______ give a choice over a period of time, (3) _______ water with vitamins to water without vitamins (4) _______ there is no difference in taste or smell between the two water bottles. When a (5) _______ flavor was added to the vitamin-enriched (6) _______, the rats did seem to (7) _______ a taste for it and kept drinking it, even after the vitamins were (8) _______ to the clear water. (9) _______, however, they broke the habit and went back to (10) _______ the necessary vitamins were.

In a classic experiment, babies of 6 to 12 months old were (11) _______ in a cafeteria feeding arrangement, (12) _______ a wide selection of baby food before them they were given whatever food they pointed to or appeared (13) _______ in. We are told that at first (14) _______, but that over a period of time they managed to select well-balanced (15) _______.

So, in selecting food, rats and babies do seem to know and act (16) _______ what's best for them. Apparently, humans soon (17) _______ a kind of "body wisdom" when growing up. (18) _______ of us do not eat as wisely as we could. Many of our food preferences are (19) _______ determined and influenced by long-established habits. (20) _______ we eat cows and pigs. So

what people eat and how much they eat seems to be greatly influenced by what is going on around them.

1. [A] sense [B] feelings[C] sentiment [D] wisdom

2. [A] because [B] when [C] if only [D] whereas

3. [A] enjoy [B] select [C] favor [D] prefer

4. [A] since [B] even though [C] unless [D] in that

5. [A] fragrant [B] fragmented [C] smelly [D] pleased

6. [A] fluid [B] vapor [C] liquor [D] sip

7. [A] grow [B] train [C] develop [D] exploit

8. [A] exchanged [B] turned [C] switched [D] transformed

9. [A] For a time [B] In time [C] For a time [D] At times

10. [A] what [B] which [C] how [D] where

11. [A] lain [B] placed [C] replaced [D] displaced

12. [A] with [B] in addition [C] among [D] despite

13. [A] absorbed [B] attracted [C] involved [D] interested

14. [A] forms [B] patterns [C] designs [D] standards

15. [A] diet [B] food [C] eating [D] cuisine

16. [A] by [B] to [C] as [D] on

17. [A] gain [B] acquire [C] lose [D] miss

18. [A] Few [B] Most [C] Some [D] None

19. [A] culturally [B] politically [C] economically [D] religiously

20. [A] if [B] while [C] still [D] /

高等数学1试卷(附答案)

一、填空题(共6小题,每小题3分,共18分) 1. 由曲线2cos r θ=所围成的图形的面积是 π 。 2. 设由方程22x y =所确定的隐函数为)(x y y =,则2y dy dx x = - 。 3. 函数2 sin y x =的带佩亚诺余项的四阶麦克劳林公式为2 44 1()3 x x o x -+。 4. 1 1 dx =? 。 5. 函数x x y cos 2+=在区间?? ? ???20π,上的最大值为 6 π +。 6. 222222lim 12n n n n n n n n →∞?? +++ ?+++? ? = 4 π。 二、选择题(共7小题,每小题3分,共21分) 1. 设21cos sin ,0 ()1,0x x x f x x x x ? +

暨南大学《高等数学I 》试卷A 考生姓名: 学号: 3. 1 +∞=? C 。 A .不存在 B .0 C .2π D .π 4. 设()f x 具有二阶连续导数,且(0)0f '=,0 lim ()1x f x →''=-,则下列叙述正确的是 A 。 A .(0)f 是()f x 的极大值 B .(0)f 是()f x 的极小值 C .(0)f 不是()f x 的极值 D .(0)f 是()f x 的最小值 5.曲线2x y d t π-=?的全长为 D 。 A .1 B .2 C .3 D .4 6. 当,a b 为何值时,点( 1, 3 )为曲线3 2 y ax bx =+的拐点? A 。 A .32a =- ,92b = B. 32a =,9 2b =- C .32a =- ,92b =- D. 32a =,92 b = 7. 曲线2x y x -=?的凸区间为 D 。 A.2(,)ln 2-∞- B.2(,)ln 2-+∞ C.2(,)ln 2+∞ D.2(,)ln 2 -∞ 三、计算题(共7小题,其中第1~5题每小题6分, 第6~7题每小题8分,共46分) 1. 2 1lim cos x x x →∞?? ?? ? 解:()2 1 cos lim , 1 t t t x t →==原式令 )0 0( cos ln lim 2 0型t t t e →= (3分) t t t t e cos 2sin lim ?-→= 12 e - = (6分)

同济大学高等数学1期末试题(含答案)

1. 若82lim =?? ? ??--∞→x x a x a x ,则_______.2ln 3- 2. =+++→)1ln()cos 1(1 cos sin 3lim 20x x x x x x ____.2 3 3.设函数)(x y y =由方程4ln 2y x xy =+所确定,则曲线)(x y y =在)1,1(处的切线方程为________.y x = 4. =-++∞→))1(sin 2sin (sin 1lim n n n n n n πππ Λ______.π2 5. x e y y -=-'的通解是____.x x e e y --=21C 二、选择题(每题4分) 1.设函数)(x f 在),(b a 内连续且可导,并有)()(b f a f =,则(D ) A .一定存在),(b a ∈ξ,使 0)(='ξf . B. 一定不存在),(b a ∈ξ,使 0)(='ξf . C. 存在唯一),(b a ∈ξ,使 0)(='ξf . D.A 、B 、C 均不对. 2.设函数)(x f y =二阶可导,且 ,)(),()(,0)(,0)(x x f dy x f x x f y x f x f ?'=-?+=?<''<', 当,0>?x 时,有(A ) A. ,0<>?dy y C. ,0?>y dy 3. =+?-dx e x x x ||2 2)|(|(C) A. ,0B. ,2C. ,222+e D. 26e 4. )3)(1()(--=x x x x f 与x 轴所围图形的面积是(B ) A. dx x f ?3 0)( B. dx x f dx x f ??-3110)()( C. dx x f ?-30)( D. dx x f dx x f ??+-3110)()( 5.函数Cx x y +=361 ,(其中C 为任意常数)是微分方程x y =''的(C ) A . 通解B.特解C.是解但非通解也非特解D.不是解

自动变速箱维修费用之事故车维修拆解过程

今天遇到一辆12年现代朗动车主,这辆现代是1.6 6速的,搭载了现代A6GF1变速箱,车主告诉我们,他的车子是事故车,没有上保险,事故导致壳体破损,油底壳破损,阀体撞坏。到事故之前没有出现过故障问题经过师傅的一番检测,给出的故障分析为:车子年限s不长,公里数不高,跑8万多。 师傅通过用专检设备读故障码 数据流发现:报故障代码P0721变速箱输出转速传感器,不可信信号 建议维修方案:由于是事故车,建议客户大拆解下来,仔细看下除了肉眼看到的,检测出来看到的。问我事故导致的变速箱维修价格高吗?里面没有其他撞坏的吧 那么现在就开始看维修经过了,这是从车上抬下的变速箱 拆下来外壳的情况

油底壳撞烂了 这个是变矩器,这个是的需要翻新的。

油封,这个是需要更换的 拆下来的阀体,看,挺新的吧。就是他报故障码了

拆开发现好几组摩擦片有剥落的症状 这个是是差速器

拆解完了,下面着重介绍朗动变速箱常见的故障,希望能帮到大家。 朗动12年8月上市,搭建1.6L与1.8L两款发动机,其中1.6L配备的是gammacvvt发动机,具有良好的动力性能。朗动采用6速手自一体变速器以及AMS/MDPS等节油配置,结合北京现代主动式ECO经济驾驶模式,使朗动在同级车中拥有不错的燃油经济性。当您遇到朗动6速手自一体变速箱故障问题时,希望能够帮助您 1.现代朗动6速手自一体变速箱常见故障: ①挂挡冲击、挂挡反应慢、挂挡不走车; 换挡冲击、换挡打滑; 故障原因:阀体性能不良;变速箱离合器损坏; ②变速箱故障灯亮,报油温传感器故障 故障原因:油温传感器或线路板损坏 ③变速箱内部异响、噪音大, 故障原因:变速箱内部轴承损坏 ④变速箱不换挡(锁档)、挂挡冲击、加速无力, 故障原因:变速箱电子电路故障,离合器打滑故障; 那到这里也就都拆解完成了,这里也在说下异响这块,因为我之前遇到了比较多的车主都有这个问题,所以也多说一句。CVT箱子出现异常一个就是我刚才说到的主副压力缸匹配的轴承出现磨损, 另一方面就是差速器以及变速箱与发动机连接处的飞轮上面有个卡滞弹簧出现松旷也会出现类似的异响。所以如果出现问题, 我司是一家专门致力于汽车自动变速箱维修和再制造业务的全国连锁性企业。至今,在华东,华北,华中,

变速器传动路线 文档

二、三轴式变速器的变速传动机构 三轴式变速器用于发动机前置后轮驱动的汽车。下面以东风EQ1092中型货车的变速器为例进行介绍,其结构简图如图3-18所示,有三根主要的传动轴,一轴、二轴和中间轴,所以称为三轴式变速器。另外还有倒档轴。 图3-18 东风EQ1092中型货车的三轴式变速器 l-一轴 2-—轴常啮合齿轮 3-—轴常啮合齿轮接合齿圈 4、9-接合套;5-四档齿轮接合齿圈 6-二轴四档齿轮 7-二轴三档齿轮 8-三档齿轮接合齿圈 10-二档齿轮接合齿圈 11-二轴二档齿轮 12-二轴一、倒档直齿滑动齿轮 13-变速器壳体 14-二轴 15-中间轴 16-倒档轴 17、19-倒档中间齿轮 18-中间轴一、倒档齿轮 20-中间轴二档齿轮 21-中间轴三档齿轮 22-中间轴四档齿轮 23-中间轴常啮合齿轮 24、25-花键毂 26-一轴轴承盖 27-回油螺纹该变速器为五档变速器,各档传动情况如下: (1)空档 二轴上的各接合套、传动齿轮均处于中间空转的位置,动力不传给第二轴。

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大一第一学期期末高等数学(上)试题及答案

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(C )0)(,0)(<''<'x f x f 。 (D )0)(,0)(>''<'x f x f 。 4、设)(x f 是连续函数,且? -=dt t f x F x e x )()(,则)(x F '等于( ) 。 (A )())(x f e f e x x ----。 (B )() )(x f e f e x x +---。 (C ) ())(x f e f e x x --- 。 (D )())(x f e f e x x +--。 5、设函数x x a x f 3sin 31sin )(+=在3 π =x 处取得极值,则( )。 (A ))3(,1πf a =是极小值。 (B ))3 (,1π f a =是极大值。 (C ))3(,2πf a =是极小值。 (D ))3 (,2π f a =是极大值。 三、计算题(本题共7个小题,每小题6分,满分42分) 1、求 ) 1ln(sin 1tan 1lim 30x x x x ++-+→ 2、设4lim 221=-++→x x b ax x x ,求 b a 、。

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一.分工 二.设备、工量具检查 三.拆卸 1.拆油滤网及密封圈; 2.拆传输线(工具:3373)及固定座螺栓; 3.拆手动滑阀操纵杆; ①工具:TX20 ;②方法:拨至P档。 4.拆滑阀箱; ①工具:TX30 ;②方法:对角、分步拧松螺栓。 5.取下B1密封塞及密封圈; 6.拆下油泵; ①工具:TX45 ;②方法:均匀拧入M8螺栓,压出油泵。 7. 拔出隔离管、B2及所有离合器并分解; 8.取下涡轮轴活塞环、带垫圈的推力滚针轴承、调整垫圈; 9.将K1从K3上压出; ①工具:VW402、VW412、3110 ;②方法:套管3110的销对着板VW402。10.分解K1、K2、K3并标记各弹性挡圈;取下涡轮轴密封圈; 11.固定大太阳轮,拆下小输入轴螺栓及调整垫圈; 12.拔出大、小输入轴、大太阳轮; 13.拆G38、G68及密封圈; 14.拆隔离管弹性挡圈、单向离合器弹性挡圈; 15.拔出单向离合器及行星齿轮支架;

16.拆下B1片组。 四.检查 1.清洁、检查K1:片数内5外5(查手册00-6,正常);无烧蚀、无损坏。2.用千分尺测量K1外片厚度; 查手册38—8,第一个外片2mm,实测XXX,其余外片1.5mm,实测XXX。 3.清洁、检查K2:片数内5外5(查手册00-6,正常);无烧蚀,无损坏。 4.用千分尺测量K2压盘厚度:查手册38—12,标准值4.9mm,实测XXX。 5. 清洁、检查K3:片数内5外4(查手册00-6,正常);无烧蚀,无损坏。 6. 清洁、检查B1:片数内5外5(查手册00-6,正常);无烧蚀,无损坏。 7.用千分尺测量B1压盘厚度:查手册37—69,标准值10.5mm,实测XXX。 8. 清洁、检查B2:片数内6外7(查手册00-6,正常);无烧蚀,无损坏。 9.用千分尺测量B2外片厚度; 查手册37—64,第一个外片3mm,实测XXX,其余外片2mm,实测XXX。 10.用深度尺测量隔离管高度:查手册37—64,标准值64.9mm,实测XXX。 11.清洁、检查所有零件:离合器鼓、单向离合器、滑阀箱、传输线、大、小输入轴、大太阳轮、行星齿轮支架、轴承及垫片、B1密封塞、变速箱壳体:无损坏。 据手册规定:所有的橡胶密封圈、密封垫、手动滑阀操纵杆螺栓、卡夹需更换。 五、测量装配 1. 润滑、组装K1、K2、K3; 2.润滑、安装涡轮轴O型环、带垫片的推力滚针轴承; 3.将K1压到K3上;

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是如何实现这些功能的。

从发展历程上我们可以看出,最初的AMT变速箱是为法拉利、阿尔法罗密欧等F1赛车或者超级跑车研发的。在早期时候用于赛车的变速箱都是手动变速箱,赛车手在换挡时需要断开动力并且需要单手扶住方向盘,这样一来在换挡时机及驾驶安全上都大打折扣,为了弥补这一缺点,设计师们开始研发AMT变速箱,其设计理念就是希望在传统的MT变速箱上增加一套自动的换挡执行机构,这样一来既能继承传统MT变速箱低成本、传动效率高等优势,又能解决MT变速箱换挡麻烦的劣势。 随着AMT变速箱的研发成功,并且在赛车上逐步发展成熟,2000年以后AMT变速箱开始逐步向民用车发展,一般情况下AMT变速箱要么搭载在民用小车上,要么搭载在超级跑车或者赛车上,因为AMT变速箱的换挡冲击的问题,以至于在舒适性上会有所牺牲,所以一般生产中高级轿车的厂家很少会选用AMT变速箱。 ●AMT变速箱的总体构成:传统的MT变速箱箱体/换挡执行机构/TCU/换挡杆

因为AMT设计最初的设想就是能够在传统的MT变速箱上增加一套自动的换挡机构,所以最终研发出的结果也是同样,其有一个传统的MT变速箱的箱体加上一套换挡执行单元总成(MG3上的AMT变速箱是电液控制的执行机构,常见的还有电动控制的执行机构),此外还有一个换挡杆和TCU(变速箱电脑)。

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A.see x+x B.sec x+x+C A.

23.求不定积分 24.计算二重积分,,其中D是由直线x=1、y=1及x轴、y轴所围成的平面区域.

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