在直角坐标平面中，已知点P1（1，2），P2（2，22），P3（3，23），…，

发布时间：2017-04-17 03:31 │ 来源：www.tikuol.com

题型：解答题

问题：

在直角坐标平面中，已知点P₁（1，2），P₂（2，2²），P₃（3，2³），…，P_n（n，2ⁿ），其中n是正整数．对平面上任一点A₀，记A₁为A₀关于点P₁的对称点，A₂为A₁关于点P₂的对称点，…，A_n为A_n-1关于点P_n的对称点．
（1）求向量

A0A2

的坐标；
（2）当点A₀在曲线C上移动时，点A₂的轨迹是函数y=f（x）的图象，其中f（x）是以3位周期的周期函数，且当x∈（0，3]时，f（x）=lgx．求以曲线C为图象的函数在（1，4]上的解析式；
（3）对任意偶数n，用n表示向量

A0An

的坐标．

考点：平面向量的应用

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按我国现行规定，预备费包括（）两部分。

A.基本预备费

B.人工预备费

C.材料预备费

D.工程预备费

E.涨价预备费

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我国《民法通则》规定的民事责任包括（）。

A.相对责任和绝对责任

B.侵权责任、违约责任和其他责任

C.过失责任和无过失责任

D.当事人责任、第三者责任和其他责任

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胎儿是指（　　）

A．受精卵开始到婴儿出生以前的胚胎

B．受精卵分裂开始到婴儿出生以前的胚胎

C．胚胎发育的第一个月末到出生以前的胚胎

D．胚胎发育的第二个月末到出生以前的胚胎

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     In the fifteenth century in Nuremberg, lived a family with eighteen children. They were so poor that
two children, who wanted to pursue their talent for __1__, knew their father would never be __2__
able to send either of them to Nuremberg to study at the Academy.
     So they tossed (掷) a coin. Albrecht Durer, the younger, __3__ the toss and went off to
Nuremberg. Albert went down into the dangerous __4__ and, for the next four years, financed his
brother, who did so well that his works were even better than those of most of his __5__. By the time
he graduated, he was beginning to earn __6__ fees by drawing for wealthy people.
     When Albrecht returned home, at dinner he drank a __7__ to his beloved brother for the years of
__8__ that had enabled him to fulfill his __9__. He said, "Albert, my blessed brother, now it is your
__10__ to go to Nuremberg to pursue your dream, and I will take care of you."
     With tears in his eyes, Albert held his hands close to his right cheek and said, "No, brother. I
cannot go. Look…look what four years in the mines have done to my __11__! The bones in every
finger have been __12__ at least once. Lately I have been suffering from arthritis (关节炎) so badly
in my right hand that I cannot even hold a __13__ to return your toast, much less make delicate lines
with a pen or a brush. No, brother…, for me it is too __14__."
     Deeply moved, Albrecht painstakingly drew his brother's __15__ hands with palms together and
thin fingers stretched skyward. He called his powerful drawing __16__ "Hands", to which the entire
world immediately opened their hearts and later they __17__ it "The Praying Hands".
     The next time when you see a copy of that __18__ creation, take a second look. Let it be your
__19__, if you still need one, that no one ever makes it __20__!

( )1. A. assistance
( )2. A. fundamentally
( )3. A. won
( )4. A. mountains
( )5. A. classmates
( )6. A. concrete
( )7. A. beer
( )8. A. donation
( )9. A. attempt
( )10. A. turn
( )11. A. health
( )12. A. injured
( )13. A. knife
( )14. A. urgent
( )15. A. abused
( )16. A. happily
( )17. A. sold
( )18. A. longing
( )19. A. reminder
( )20. A. along

B. art
B. frequently
B. lost
B. oceans
B. colleagues
B. considerable
B. drink
B. education
B. ambition
B. dream
B. body
B. strengthened
B. spoon
B. unnecessary
B. dark
B. simply
B. bought
B. touching
B. aid
B. aside

C. science
C. financially
C. ended
C. deserts
C. professors
C. considerate
C. drop
C. sacrifice
C. assignment
C. kindness
C. mind
C. sharpened
C. glass
C. messy
C. wide
C. carefully
C. found
C. challenging
C. guide
C. alone

D. dreaming
D. flexibly
D. started
D. mines
D. brothers
D. confidential
D. toast
D. experience
D. assessment
D. hope
D. hands
D. used
D. pen
D. late
D. fragile
D. badly
D. renamed
D. disturbing
D. coach
D. aware

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既开窍醒神，又活血散结的药是

A．冰片
B．远志
C．麝香
D．苏合香
E．石菖蒲

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