中央電大經(jīng)濟(jì)數(shù)學(xué)基礎(chǔ)期末復(fù)習(xí)考試整理題庫(kù)資料

1、 期末復(fù)習(xí)參考練習(xí)題一 單選題1、設(shè)，則（ C ）A B C D 2、曲線在點(diǎn)（0，1）處的切線方程為（ A ）。A B C D 3、若，則 B ）A B C D 4、設(shè)A，B為同階可逆矩，則下列等式成立的是（ C ）A B C D 5、線形方程組解的情況是（ D ）A 有無窮多解 B 只有0解 C 有唯一解 D 無解1函數(shù)的定義域?yàn)椋?D ）A B、 C、 D、 2設(shè)處的切線方程是（ A ）A B、 C 、 D、 3下列等式中正確的是（ B ）A B、 C、 D、 4、設(shè)A為B有意義，則C為（ B ）矩陣。A B C D 5線性方程組解的情況是（ D ）A無解 B、有無窮多解 C 只有0解

2、D 有唯一解1下列結(jié)論中 （ D ）是正確的。A 基本初等函數(shù)都是單調(diào)函數(shù) B 偶函數(shù)的圖形是關(guān)于坐標(biāo)原點(diǎn)對(duì)稱C 周期函數(shù)都是有界函數(shù) D 奇函數(shù)的圖形是關(guān)于坐標(biāo)原點(diǎn) 對(duì)稱2函數(shù)（ C ）A -2 B -1 C 1 D 2 3下列等式成立的是（ C ）A、 B、 C、 D 、4、設(shè)A，B是同階方陣，且A是可逆矩陣，滿足（ A ）。A、I+B B、 1+B C、 B D、 5、設(shè)線性方程組有無窮多解的充分必要條件是（ D ）A、 B、 C、 D、1函數(shù)的定義域是（ B ）A B、C D、2若（ A ）A0 B 、 C、 D、3下列函數(shù)中，（ D ）是的原函數(shù)。A B、 C、 D、4設(shè)A是矩陣，B

3、是矩陣，且有意義，則C是（ D ）矩陣。A B、 C、 D、5用消元法解方程組得到的解為（ C ）。A B、 C、 D、1下列各函數(shù)對(duì)中，（ D ）中的兩個(gè)函數(shù)相等。A、 B、C D、2已知，當(dāng)（ A ）時(shí)，為無窮小量。A、 B、 C、 D、3、（ C ）A、0 B、 C、 D、4、設(shè)A是可逆矩陣，且A+AB=I，則=（ C ）A、B B、1+B C、 I+B D、5設(shè)線性方程組AX=b的增廣矩陣為，則此線性方程組的一般解中自由未知量的個(gè)數(shù)為（ B ）A、 1 B、2 C、3 D、41.下列各函數(shù)中的兩個(gè)函數(shù)相等的是（ C ）A. B. C. D. 2.下列函數(shù)在區(qū)間（）上單調(diào)增加的是（ C

4、）A. B. C. D. 3. 若是的一個(gè)原函數(shù)，則下列等式成立的是（ B ）A. B. C. D. 4. 設(shè)A，B為同階可逆矩陣，則下式成立的是（D ）A. B. C. D.5.設(shè)線性方程組AX=B有唯一解，則線性方程組AX=O的解的情況是（ A ）A. 只有零解 B.有非零解 C.解不能確定 D.無解二、填空題 6、函數(shù) 的定義域是。-5，2 ）7、。08、函數(shù)的原函數(shù)是。9、設(shè)A，B均為n階矩陣，則等式成立的充分必要條件是。A，B任意10、齊次線性方程組AX=O的系數(shù)矩陣為則此方程組的一般解為6、若函數(shù)，則。7 、設(shè)需求量q對(duì)價(jià)格p的函數(shù)為，則需求彈性為。8。9若則線性方程組AX=b。無

5、解10設(shè)，則。6、函數(shù)的定義域?yàn)椤＃?3，-2）（-2，3）7、需求量對(duì)價(jià)格的函數(shù)為則需求彈性為。8。09、當(dāng)時(shí)，矩陣是對(duì)稱矩陣。 310、線性方程組，且，則=時(shí)，方程組有無窮多解。-16已知生產(chǎn)某產(chǎn)品的成本函數(shù)為則當(dāng)產(chǎn)量單位時(shí)，該產(chǎn)品的平均成本為。3.67、函數(shù)的間斷點(diǎn)是。8、。29、的秩為。210、若線性方程組 有非0解，則=。-16、若函數(shù)則=。7、已知，若內(nèi)連續(xù)，則a=.28、若存在且連續(xù)，則=。9、設(shè)矩陣，I為單位矩陣，則=. 10、已知齊次線性方程組AX=O中A為3*5矩陣，且該方程組有非0解，則.36 .函數(shù)的圖型關(guān)于對(duì)稱 坐標(biāo)原點(diǎn)7.曲線在（處的切線斜率是。 -18. 。 09

6、.兩個(gè)矩陣A，B既可以相加又可以相乘的充分必要條件是。A，B為同階矩陣10. 線性方程組AX=B有解的充分必要條件是。 三 計(jì)算題11、由方程確定的隱函數(shù)，求。解 11設(shè)，求。解 11、已知求解 11、 求解、 11、設(shè)解 11 .已知，求解：11 求解 11. 求解 11. 求解11. 求解 11. 求解 11 11、 11.由方程確定的隱函數(shù)， 求解 11. 由方程確定的隱函數(shù)， 求解 11 由方程 確定的隱函數(shù) 求 解 當(dāng) 11 由方程 確定的隱函數(shù) 求 解 12、解 12解 12. 解 12、解 =12.計(jì)算解： 12、解、12、解、12. 解 12. 解12. 解 12. 解 12.

7、 解 12. 解 12. 解 12. 解 13、設(shè)矩陣A=解 因?yàn)?所以13設(shè)矩陣解 所以 13、設(shè)矩陣，計(jì)算解： 所以 13、設(shè) 求解 所以 13、設(shè)矩陣解 13 .已知AX=B，其中，求X解 . 即13.設(shè)矩陣 計(jì)算解 且 13. 設(shè)矩陣， 求逆矩陣 解 且 所以 13.設(shè)矩陣 計(jì)算 解 13.設(shè)矩陣 計(jì)算 解 13.解矩陣方程 解 即 13.解矩陣方程 解 即 所以 14.設(shè)線性方程組討論當(dāng) 為何值時(shí)，方程組無解，有唯一解，無窮多解。解 當(dāng) 方程組無解；當(dāng) 方程組有唯一解；當(dāng) 方程組有無窮多解。14求線性方程組的一般解。解因?yàn)閯t一般解為：14、當(dāng)b為何值時(shí)，線性方程組 有解，有解時(shí)求一般

8、解。解 所以當(dāng)b=5是方程組有解，且由得解為14、求線性方程組的一般解。解、一般解為14、設(shè)線性方程組 問為何值時(shí)方程組有非0解，并求一般解。解 所以當(dāng)時(shí)，方程有非0解，一般解為14、求線性方程組的一般解解 方程組的一般解為：14.當(dāng)為何值時(shí)，線性方程組有解，在有解的情況下求方程組的一般解解 當(dāng)=3時(shí)，方程組有解， 原方程組化為得解 五、應(yīng)用題15設(shè)生產(chǎn)某種產(chǎn)品q單位時(shí)的成本函數(shù)為：（萬元）求：（1）當(dāng)q=10時(shí)的總成本、平均成本和邊際成本； （2）當(dāng)產(chǎn)量q為多少時(shí)，平均成本最??？解 （1）總成本 平均成本 邊際成本 （2） 令得q=20當(dāng)產(chǎn)量為20時(shí)平均成本最小。15設(shè)生產(chǎn)某產(chǎn)品的邊際成本為

9、（萬元/百臺(tái)），邊際收入為（萬元/百臺(tái)），其中q是產(chǎn)量，問產(chǎn)量為多少時(shí)，利潤(rùn)最大？從利潤(rùn)最大時(shí)的產(chǎn)量再生產(chǎn)2百臺(tái)，利潤(rùn)將會(huì)發(fā)生怎么的變化？解 （1）令，得q=10產(chǎn)量為10百臺(tái)時(shí)利潤(rùn)最大。（2）從利潤(rùn)最大時(shí)的產(chǎn)量再生產(chǎn)2百臺(tái)，利潤(rùn)將減少20萬元。15設(shè)某工廠生產(chǎn)某產(chǎn)品的固定成本為200（百元），每生產(chǎn)一個(gè)單位產(chǎn)品，成本增加5（百元），且已知需求函數(shù)，這種產(chǎn)品在市場(chǎng)上是暢銷的，（1）試分別列出該產(chǎn)品的總成本函數(shù)和總收入函數(shù)表達(dá)式；（2）求使該產(chǎn)品利潤(rùn)最大的產(chǎn)量及最大利潤(rùn)。解 （1）總成本函數(shù) 總收入函數(shù) （2）利潤(rùn)函數(shù)為 令 得 產(chǎn)量，即當(dāng)產(chǎn)量為45單位時(shí)利潤(rùn)最大最大利潤(rùn) 15已知某產(chǎn)品的邊際成

10、本為（元/件），固定成本為0，邊際收入，求：（1）產(chǎn)量為多少時(shí)利潤(rùn)最大？（2）在最大利潤(rùn)的基礎(chǔ)上再生產(chǎn)50件，利潤(rùn)將會(huì)發(fā)生什么變化？解：（1）邊際利潤(rùn) 令當(dāng)產(chǎn)量為500是利潤(rùn)最大。（2）當(dāng)產(chǎn)量由500件增加至550件時(shí)，利潤(rùn)改變量為 （元）即利潤(rùn)將減少25元。15、 已知某產(chǎn)品的邊際成本為（萬元/百臺(tái)），q為產(chǎn)量（百臺(tái)），固定成本為18（萬元），求（1）該產(chǎn)品的平均成本； （2）最低平均成本。解 （1）成本函數(shù)為則平均成本函數(shù)為 （2）令 得 最低平均成本為 （萬元/百臺(tái)）15，某廠生產(chǎn)某種產(chǎn)品q千件時(shí)的總成本函數(shù)為（萬元），單位銷售價(jià)格為（萬元/千件），試求（1）產(chǎn)量為多少時(shí)可使利潤(rùn)達(dá)到最大

11、？（2）最大利潤(rùn)是多少？解（1）由已知得利潤(rùn)函數(shù) 從而有令 解，產(chǎn)量為1千件時(shí)利潤(rùn)最大。（2）最大利潤(rùn)為（萬元）15設(shè)生產(chǎn)某種產(chǎn)品q臺(tái)時(shí)的邊際成本（元/臺(tái)），邊際收入，試求獲得最大利潤(rùn)時(shí)的產(chǎn)量。解：邊際利潤(rùn)為令 得 當(dāng)產(chǎn)量為2000時(shí)利潤(rùn)最大。設(shè)某產(chǎn)品的成本函數(shù)為（萬元）其中q是產(chǎn)量（單位：臺(tái)），求使平均成本最小的產(chǎn)量，并求最小平均成本是多少？解：平均成本 解得 即當(dāng)產(chǎn)量為50臺(tái)時(shí)，平均成本最小，最小平均成本為（萬元）15。生產(chǎn)某種產(chǎn)品的固定費(fèi)用是1000萬元，每生產(chǎn)1臺(tái)該品種產(chǎn)品，其成本增加10萬元，又知對(duì)該產(chǎn)品的需求為（其中q是產(chǎn)銷量（單位：臺(tái)），p是價(jià)格（單位：萬元），求使該產(chǎn)品利潤(rùn)最大

12、的產(chǎn)量；該產(chǎn)品的邊際收入。解：（1）設(shè)總成本函數(shù)為，收入函數(shù)為，利潤(rùn)函數(shù)為于是得 即生產(chǎn)50臺(tái)時(shí)該種產(chǎn)品能獲最大利潤(rùn)。因?yàn)椋蔬呺H收入（萬元/臺(tái)）。15 某廠生產(chǎn)一批產(chǎn)品，其固定成本為2000元，每生產(chǎn)一噸產(chǎn)品的成本為60元，對(duì)這種產(chǎn)品的市場(chǎng)需求規(guī)律為，試求：（1）成本函數(shù)，收入函數(shù)；（2）產(chǎn)量為多少時(shí)利潤(rùn)最大？解：（1）成本函數(shù)為因?yàn)?，即所以收入函數(shù)為（2）因?yàn)槔麧?rùn)函數(shù)為 令得即當(dāng)產(chǎn)量為200噸時(shí)利潤(rùn)最大。15 .設(shè)某工廠生產(chǎn)的產(chǎn)品的固定成本為50000元，每生產(chǎn)一個(gè)單位產(chǎn)品，成本增加100元，又已知需求函數(shù)，這種產(chǎn)品在市場(chǎng)上是暢銷的，問價(jià)格為多少時(shí)利潤(rùn)最大？并求最大利潤(rùn)。解：利潤(rùn)函數(shù)令得

13、 ，即當(dāng)價(jià)格為300元是利潤(rùn)最大。最大利潤(rùn)為（元）15. 某廠生產(chǎn)某種產(chǎn)品q件時(shí)的總成本函數(shù)為（元），單位銷售價(jià)為（元/件），問產(chǎn)量為多少時(shí)可以使利潤(rùn)達(dá)到最大？最大利潤(rùn)是多少。解：收入函數(shù)為 利潤(rùn)函數(shù)且 得 即當(dāng)產(chǎn)量為250件時(shí)可使利潤(rùn)最大，且最大利潤(rùn)為（元）15.某廠每天生產(chǎn)某產(chǎn)品q件時(shí)的成本為（元）。為使平均成本最低，每天產(chǎn)量應(yīng)為多少？此時(shí)，每件產(chǎn)品平均成本為多少？解：平均成本為令 得 即為使平均成本最低，每天應(yīng)該生產(chǎn)140件，此時(shí)的平均成本為（元/件）15.已知某廠生產(chǎn)q件產(chǎn)品的成本為（萬元），要使平均成本最少，應(yīng)生產(chǎn)多少件產(chǎn)品？解：因?yàn)榱?得 要使平均成本最小，應(yīng)生產(chǎn)50件產(chǎn)品。15.

14、投產(chǎn)某產(chǎn)品的固定成本為36萬元，且邊際成本為（萬元/百臺(tái)），試求產(chǎn)量由4白臺(tái)增加至6百臺(tái)時(shí)總成本的增量，及產(chǎn)量為多少時(shí)，可使平均成本達(dá)到最低。解：當(dāng)產(chǎn)量由4百臺(tái)增加至6百臺(tái)時(shí)，總成本的增量為（萬元）又 得 即產(chǎn)量為6百臺(tái)時(shí)可使平均成本達(dá)到最小。15.設(shè)生產(chǎn)某產(chǎn)品的總成本函數(shù)為（萬元），其中q為產(chǎn)量，單位百噸，銷售百噸時(shí)的邊際收入為（萬元/百噸），求：利潤(rùn)最大時(shí)的產(chǎn)量。在利潤(rùn)最大時(shí)的產(chǎn)量基礎(chǔ)上再生產(chǎn)1百噸，利潤(rùn)會(huì)發(fā)生什么變化？解：（1）由成本函數(shù)得邊際成本函數(shù) 邊際利潤(rùn) 令 得 當(dāng)產(chǎn)量為7百噸時(shí)利潤(rùn)最大。當(dāng)產(chǎn)量由7百噸增加至8百噸時(shí)，利潤(rùn)改變量為（萬元）即利潤(rùn)將減少1萬元。g an employ

15、ment tribunal claimEmployment tribunals sort out disagreements between employers and employees.You may need to make a claim to an employment tribunal if:you dont agree with the disciplinary action your employer has taken against youyour employer dismisses you and you think that you have been dismiss

16、ed unfairly.For more information about dismissal and unfair dismissal, seeDismissal.You can make a claim to an employment tribunal, even if you haventappealedagainst the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any compensation a

17、warded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are complaining about happened. If your application is received after this time limit, the tribunal will not usual

18、ly accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed underFurther help.Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation.Most

19、 people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the organisations listed underFurther help.If you are being represented by a solicitor at the tribunal, they may ask yo

20、u to sign an agreement where you pay their fee out of your compensation if you win the case. This is known as adamages-based agreement. In England and Wales, your solicitor cant charge you more than 35% of your compensation if you win the case.If you are thinking about signing up for a damages-based

21、 agreement, you should make sure youre clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by e-mail, click onnearest CAB.For more information about ma

22、king a claim to an employment tribunal, seeEmployment tribunals.The (lack of) air up there Watch mCayman Islands-based Webb, the head of Fifas anti-racism taskforce, is in London for the Football Associations 150th anniversary celebrations and will attend Citys Premier League match at Chelsea on Sun

23、day.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me its about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasopened disciplinary proceedings against CSKAfor the racist behaviour of their fans duringC

24、itys 2-1 win.Michel Platini, president of European footballs governing body, has also ordered an immediate investigation into the referees actions.CSKA said they were surprised and disappointed by Toures complaint. In a statement the Russian side added: We found no racist insults from fans of CSKA.A

25、ge has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day; May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Alway

26、s feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it.一字開頭的年齡已經(jīng)到了尾聲?；蛟S是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個(gè)不同的日子過成了同一天的樣子；或許是追溯過去，對(duì)自己那些近乎偏執(zhí)的怪異信念的醒悟，這些天以來，思緒一直很凌亂，在腦海中不斷糾纏?？傆X得自己自己似乎應(yīng)該去做點(diǎn)什么，或者寫點(diǎn)什么。二十年的人生軌跡深深淺淺，突然就感覺到有些事情，非做不可了。The end

27、of our life, and can meet many things really do?而窮盡我們的一生，又能遇到多少事情是真正地非做不可？During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional; Junior high school, thought to have a crush on just

28、means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isnt really grow up, it seems is not so important; Then in high school, think dont want to give vent to out your inner voice can be in the high school children of the feelings in a pe

29、riod, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already cant remember his appearance.童年時(shí)，覺得壓歲錢和新衣服是過年必備，但是隨著年齡的推進(jìn)，會(huì)越來越發(fā)現(xiàn)，那些東西根本就可有可無；初中時(shí)，以為要有一場(chǎng)暗戀才意味著真正的

30、成長(zhǎng)，但三年過去后，自己心平氣和的寫同學(xué)錄的時(shí)候，突然就發(fā)現(xiàn)是不是真正的成長(zhǎng)了，好像并沒有那么重要了；然后到了高中，覺得非要吐露出自己的心聲才能為高中生涯里的懵懂情愫劃上一個(gè)句點(diǎn)，但畢業(yè)晚會(huì)的時(shí)候最終還是被梗塞在了咽喉，后來再次站在他曾經(jīng)揮汗如雨的球場(chǎng)，看著他投過籃球的球框時(shí)，突然間發(fā)現(xiàn)自己已經(jīng)想不起他的容顏。Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time.原來，這個(gè)世界上，對(duì)某個(gè)事件能產(chǎn)生化學(xué)反應(yīng)的，除了非做

31、不可的堅(jiān)決，還有，時(shí)間。A persons time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot

32、 of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a self-righteous spiritual.一個(gè)人的時(shí)候，自己的想法總是特別地清晰。想要的，不想要的，界限明確，好像沒有什么可以撼動(dòng)自己。也曾經(jīng)好像已經(jīng)下定了決心去做某件事，但更多的時(shí)候是最后又打起了退堂鼓。嫌惡過自己的怯懦，最終卻發(fā)現(xiàn)有很多緣分，有很多錯(cuò)過，好像冥冥之中真的已經(jīng)注定。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支

33、強(qiáng)心劑，或者說，是自以為是的精神寄托罷了。At the moment, the sky is dark, the air is fresh factor after just rained. Suddenly thought of blue plaid shirt; Those were broken into various shapes of stationery; From the corner at the beginning of deep friendship; Have declared the end of the encounter that havent start pla

34、nning. Those years, those days of do, finally, like youth, will end in our life.此刻，天空是陰暗的，空氣里有著剛下過雨之后的清新因子。突然想到那件藍(lán)格子襯衫；那些被折成各種各樣形狀的信紙；那段從街角深巷伊始的友誼；還有那場(chǎng)還沒有開始就宣告了終結(jié)的邂逅計(jì)劃那些年那些天的非做不可，終于和青春一樣，都將在我們的人生中謝幕。Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Start

35、ing at the ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. It will climb higher th

36、an the tip of Mount Everest (5.5 miles/8.85 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The supersonic descent cou

37、ld happen as early as Sunda.The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Earth becomes the concrete bottom of a swimming pool that he wants to land on, but

38、not too hard. Still, hell be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jumpWhen he jumps, he is expected to reach the speed of sound - 690 mph (1,110 kph) - in less th

39、an 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him completely.If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His tea

40、m hopes its not needed. Instead, he plans to deploy his 270-square-foot (25-square-meter) main chute at an altitude of around 5,000 feet (1,524 meters).In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically

41、 if he loses consciousness at mach speeds.Even if everything goes as planned, it wont. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters).cause thereIf we dont do that it will go on and go

42、 on. We have to stop it; we need the courage to do it.His comments came hours after Fifa vice-president Jeffrey Webb - also in London for the FAs celebrations - said he wanted to meet Ivory Coast international Toure to discuss his complaint.CSKA general director Roman Babaev says the matter has been

43、 exaggerated by the Ivorian and the British media.Blatter, 77, said: It has been decided by the Fifa congress that it is a nonsense for racism to be dealt with with fines. You can always find money from somebody to pay them.It is a nonsense to have matches played without spectators because it is aga

44、inst the spirit of football and against the visiting team. It is all nonsense.We can do something better to fight racism and discrimination.This is one of the villains we have today in our game. But it is only with harsh sanctions that racism and discrimination can be washed out of football.The (lac

45、k of) air up there Watch mCayman Islands-based Webb, the head of Fifas anti-racism taskforce, is in London for the Football Associations 150th anniversary celebrations and will attend Citys Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya

46、 Toure, he told BBC Sport.For me its about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasopened disciplinary proceedings against CSKAfor the racist behaviour of their fans duringCitys 2-1 win.Michel Platini, president of European footballs governing b

47、ody, has also ordered an immediate investigation into the referees actions.CSKA said they were surprised and disappointed by Toures complaint. In a statement the Russian side added: We found no racist insults from fans of CSKA.Baumgartner the disappointing news: Mission aborted.The supersonic descen

48、t could happen as early as Sunda.The weather plays an important role in this mission. Starting at the ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. It will climb higher than the tip of Mount Everest (5.5 miles/8.85 kilometers), drifting even higher