2011年1月《概率统计B》(B卷)答案

2011年1月《概率统计B 》（B 卷）答案

一、

填空题（每题3分，共15分）

1. 0.7;

2. 0.2

3. 15

±， 2 ;

4. 0.328;

5. 19

二、 单选题（每题3分，共15分）

1. C

2. A

3. D

4. B

5. B 三、（10分）解: A 为甲击中目标，B 为乙击中目标，C 为目标被击中

0.750.6

0.50.56.00.6

)

B ()B ()A ()

()

C ()()

C ()C ()C |(=?=

=

==

－＋＋A P P P A P P A P P A P A P 2．

四、（10分）解:

五、（10分）解：设事件1A 与2A 分别表示“取出的是甲、乙机床加工的零件”，

B =“取出的零件为次品”

，则由已知条件，知 12()3

P A =

, 21()3

P A =

, 1()0.03P B A =, 2()0.02P B A =

(1)2

1

()()()i i i P B P A P B A ==

∑

210.080.030.020.02733

3

=

?+

?=

≈

所以 ()1()10.0270.973P B P B =-=-=

（2） 222210.02

()()

()1

3()()

()

0.0834

p A P B A P A B P A B P B P B ?=

=

==

六、（10分）解：（1）1=?

?

+∞

∞

-+∞

-==0

)(A dx xe

A

dx x f x

；

（2）当x ≤0时，F (x )=0； 当x >0时，?

--+-==

x

x

x

e

x dx xe x F 0

)1(1)(，

（3）E (X )200

()2x

xf x dx x e dx +∞

+∞

-===?

?

；

E (X 2

)2

30

()6x x f x dx x e dx +∞

+∞

-=

==?

?

，D (X )= E (X 2

)2

()E X -=6-4=2；

七、（10分）解：（1）当1y <时，(){}0Y

F y P Y y =≤=

当1y ≥时，1

20

1(){}{21}{}2

Y y x

y F y P Y y P X y P X e dx ---=≤=+≤=≤

=

?

所以， 当1y <时，()0Y f y =； 当1y ≥时，12

1()()2

y Y Y f y F y e

--

'==

(2)0

()(21)()(21)x E Y x f x dx x e dx +∞+∞

--∞

=

+=+?

?

=0

(21)2x

x

x e

e dx +∞

-+∞

--++=?

3

八、（10分）解：(1)()0

()(,) 0 0x y x X e dy e x f x f x y dy x +∞-+-+∞-∞

?=>?

=

=??

()0

y 0()(,) 0 y 0

x y y Y e dx e f y f x y dx +∞-+-+∞-∞

?=>?

=

=??

则有 () 0,0

(,)()() 0 x y X Y e x y f x y f x f y -+?>>==?? 其它

所以 X 与Y

相互独立. (2) ()()??

?

?

+∞∞

-+∞

∞

-+∞

+∞

--==

=

1,dy ye

dx

xe

dxdy

y x xyf

XY E y

x

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“Congratulations, Mr. Cooper. It?s a girl.” Fatherhood is going to have a different meaning and (31) a different response from every man who hears these words. Some feel (32) when they receive the news, (33) others worry, wondering whether they will be good father. (34) there are some men who like children and may have had (35) experience with them, others do not particularly (36) children and spend little time with them. Many fathers and mothers have been planning and looking forward to children for some time. (37) other couples, pregnancy was an accident that both husband and wife have (38) willingly or unwillingly. Whatever the (39) to the birth of a child, it is obvious the shift from the role of husband to (40) of a father is a difficult task. (41) , unfortunately, few attempts have been made to (42) fathers in this resocialization (43) . Although numerous books have been written about mothers, (44) recently has literature focused on the (45) of a father. It is argued that the transition to the father's role, although difficult, is not (46) as great as the transition the wife must (47) to the mother's role. The mother's role seems to require a complete (48) in daily routine. (49) , the father?s role is less demanding and (50) . 31. A. bring down B. bring forth C. bring off D. bring in 32. A. emotional B. sentimental C. bewildered D. proud 33. A. while B. when C. if D. as 34. A. When B. If C. Although D. Yet 35. A. considerate B. considerable C. considering D. considered 36. A. care about B. care of C. care with D. care for 37. A. For B. Of C. From D. Upon 38. A. received B. taken C. accepted D. obtained 39. A. reply B. reaction C. readiness D. reality 40. A. what B. this C. one D. that 41. A. As a result B. For example C. Yet D. Also 42. A. educate B. cultivate C. inform D. convert 43. A. step B. process C. point D. time 44. A. / B. just C. quite D. only 45. A. role B. work C. career D. position 46. A. a little B. just C. nearly D. almost 47. A. take B. make C. carry D. accept 48. A. transformation B. realization C. socialization D. reception 49. A. In addition B. Above all C. Generally D. However 50. A. current B. immediate C. present D. quick TEXT A We have a crisis on our hands. You mean global warning? The world economy? No, the decline of reading. People are just not doing it anymore, especially the young. Who?s responsible? Actually, it?s more like, What is responsible? The Internet, of course, and everything that comes with it —Facebook, Twitter (微博). You can write your own list. There?s been a warning about the imminent death of literate civilization for a long time. In the 20th century, first it was the movies, then radio, then television that seemed to spell doom for the written world. None did. Reading survived; in fact it not only survived, it has flourished. The world is more literate than ever before —there are more and more readers, and more and more books. The fact that we often get our reading material online today is not something we should worry over. The electronic and digital revolution of the last two decades has arguably shown the way forward for reading and for writing. Take the arrival of e-book readers as an example. Devices like Kindle make reading more convenient and are a lot more environmentally friendly than the traditional paper book.

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2011年1月高等教育自学考试全国统一命题考试 中国近现代史纲要试题 课程代码：03708 一、单项选择题（本大题共30小题，每小题1分，共30分） 在每小题列出的四个备选项中只有一个是符合题目要求的，请将其代码填写在题后的括号内。错选、多选或未选均无分。 1.太平天国由盛而衰的转折点是( D ) A.永安建制 B.长沙战役 C.北伐失利 D.天京事变 2.1861年，清政府设立的综理洋务的机关是( A ) A.总理各国事务衙门 B.江南制造总局 C.外务部 D.轮船招商局 3.1898年，张之洞发表的对抗维新变法的著作是( D ) A.《新学伪经考》 B.《孔子改制考》 C.《仁学》 D.《劝学篇》 4.1915年9月在上海创办《青年》杂志的是( B ) A.李大钊 B.陈独秀 C.胡适 D.鲁迅 5.中国近代史上第一次彻底反帝反封建的革命运动是( B ) A.辛亥革命 B.五四运动 C.五卅运动 D.国民革命 6.以第一次国共合作为基础的国民革命统一战线正式形成的标志是( C ) A.中共二大的召开 B.中共三大的召开 C.中国国民党一大的召开 D.中国国民党二大的召开 7.1925年至1926年间，中国工人坚持16个月之久的罢工斗争是( D ) A.香港海员罢工 B.安源路矿工人罢工 C.京汉铁路工人罢工 D.省港罢工 8.1928年10月，国民党中央常务委员会通过了( D ) A.《中华民国临时约法》 B.《中华民国约法》 C.《军政纲领》 D.《训政纲领》 9.1928年12月，在东北宣布“服从国民政府，改易旗帜”的是( A ) A.张学良 B.张作霖 C.冯国璋 D.冯玉祥 10.1930年8月，邓演达领导成立的中间党派是( A ) A.中国国民党临时行动委员会 B.中国青年党 C.中国国家社会党 D.中国国民党革命委员会 11.1931年11月，中国共产党在江西瑞金召开的重要会议是( C ) A.中共六届四中全会 B.红四军第九次党的代表大会 C.中华苏维埃第一次全国代表大会 D.赣南会议 12.1934年中国工农红军第五次反“围剿”斗争失败后，率先开始战略转移的是 ( B )

2011年7月信息资源管理考试试卷及答案

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2011年6月应用能力B级真题(附答案)

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2011年—2012年1月自考国贸真题及答案解析

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2011年7月全国自考英美文学选读试题和答案

45. What’s the theme of the poem Paradise Lost? What’s the author’s intention to create it and the implication that the poem expresses? 1.The theme of the poem “ParadiseLost”is the” Fall of Man,”i.e.mans disobedience and the loss of Paradise, with its prime cause----Satan. 2.The athor’s intention to write this poem is to expose the ways of Satan to” justifythe ways of God to men.” 3.In this poem,the author implicitly expresses his fundamental concern with freedom and choice and his belief that the unquestionable truth of biblical revelation means that an all-knowing God was just in allowing Adam and eve to be tempted and of their free will to choose sin and its inevitable punishment. 46. The Waste Land is T. S. Eliot’s most important single poem. What’s the theme of the poem? The theme of The Waste Land: The Waste Land is a poem concerned with the spiritual breakup of a modern civilization in which human life has lost its meaning, significance and purpose. The poem has developed a whole set of historical, cultural and religious themes; but it is often regarded as being primarily a reflection of the 20th-century disillusionment and frustration in a sterile and futile society. 47. In American literature, Emily Dickinson’s poetry is unique and unconventional in its own way. What are the features of Dickinson’s poems? 1.Dickinson is poems are usually based on her own experiences,her sorrows and joys.2.Love is another subject Dickinson dwelt on.3.Many poems Dickinson wrote are about nature,in which her general skepticism about the relationship between man and nature is well-expressed.4.Dickinson is poetry is unique and unconventional in own way.Her poems have no titles,hence are always quoted by their first lines. 48. What’s the theme of F. Scott Fitzgerald’s The G reat Gatsby? The Great Gatsby evokes a haunting mood of a glamorous, wild time that seemingly will never come again. Besides, the loss of an ideal and the disillusionment that comes with the failure are exploited fully in the personal tragedy of a young man whose "incorruptible dream" is "smashed into pieces by the relentless reality." IV. Topic Discussion(20 points in all, 10 for each) Write no less than 150 words on each of the following topics in English in the corresponding space on the answer sheet. 49. Discuss Charles Dickens’ art of fiction: the setting, the character- portrayal, the language, etc. , based on his novel Oliver Twist. (1)Charles Dickens uses a mixture of the contemporary and recollected past as his fictional setting. In his works, he sets out a full map and a large scale criticism of the 19th century England, especially London. Oliver Twist is his early novel, in which Dickens reveals the dehumanizing workhouse system and the dark, criminal underworld life. (2)Character-por trayal is the most distinguished feature of Dickens’s works. His works best-depicted characters are those innocent, virtuous, persecuted, helpless child characters such as Oliver Twist, Little Nell. Dickens writes best when she writes from the child’s poin t of view. And he is also famous for the description of those horrible and grotesque characters like Fagin, Bill Sikes.. (3)With his first sentence, he engages the reader’s attention and holds it to the end. In language, he is often compared with Shakespeare for his adeptness with vernacular and large vocabulary with which he brings out many a wonderful verbal picture of man and scene. Dickens’s works are also characterized by a mingling of humor and pathos.His humor and wit seem inexhaustible. 50. Summ arize Ernest Hemingway’s artistic features. 1. The Hemingway code heroes and grace under pressure: They have seen the cold world ,and for one cause, they boldly and courageously face the reality. They has an indestructible spirit for his optimistic view of life. Whatever is the result is, the are ready to live with grace under pressure. No matter how