填一填． 被减数6370____________4175减数______2415

已知函数f（x）=x²-2（n+1）x+n²+5n-7，

（Ⅰ）设函数y=f（x）的图像的顶点的纵坐标构成数列{a_n}，求证：{a_n}为等差数列；

（Ⅱ）设函数y=f（x）的图像的顶点到x轴的距离构成数列{b_n}，求{b_n}的前n项和S_n。

如图所示，两个相邻的有界匀强磁场区，方向相反，且垂直纸面，磁感应强度的大小均为B，磁场区在y轴方向足够宽，在x轴方向宽度均为a，一正三角形（中垂线长为a）导线框ABC从图示位置向右匀速穿过磁场区域，设逆时针方向为电流的正方向，则图中线框中产生的感应电流i与线框移动距离x的关系图象正确的是

A.

B.

C.

D.

Tales From Animal Hospital

David Grant

David Grant has become a familiar face to millions of fans of Animal Hospital . Here Dr Grant tells us the very best of his personal stories about the animals he has treated ,including familiar patients such as the dogs Snowy and Duchess , the delightful cat Marigold Serendipity Diamond . He also takes the reader behind the scenes at Harmsworth Memorial Animal Hospital as he describes his day , from ordinary medical check-ups to surgery （外科手术）. Tales From Animal Hospital will delight all fans of the program and anyone who has a lively interest in their pet ,whether it be cat , dog or snake I ! $ 14.99 Hardback 272 pp Simon Schuster

ISBN 0751304417

Isaac Newton : The Last Sorcerer

Michael White

Form the author of Stephen Hawking : A Life in Science , comes this colorful description of the life of the world’s first modern scientist . Interesting yet based on fact , Michael White’s learned yet readable new book offers a true picture of Newton completely different from what people commonly know about him . Newton is shown as a gifted scientist with very human weaknesses who stood at the point in history where magic (魔术)ended and science began.

£8.99 Hardback 320 pp Fourth Estate

ISBN 1857024168

Fermat’s Last Theorem

Simon Singh

In 1963 a schoolboy called Andrew Wiles reading in his school library came across the world’s greatest mathematical problem : Fermat’s Last Theorem (定理). First put forward by the French mathematician Pierre de Fermat in the seventeenth century, the theorem had baffled and beaten the finest mathematical minds , including a French woman scientist who made a major advance in working out the problem , and who had to dress like a man in order to be able to study at the Ecole  Polytechnique . Through unbelievable determination Andrew Wiles finally worked out the problem in 1995 . An unusual story of human effort over three centuries , Fermat’s Last Theorem will delight specialists and general readers alike .

£12.99 Hardback 384 pp Fourth Estate

ISBN 1857025210

小题1:What is Animal Hospital ?

A．A news story .

B．A popular book .

C．A research report .

D．A TV program .小题2:In Michael White’s book , Newton is described as        .

A．a person who did not look the same as in many pictures

B．a person who lived a colorful and meaningful life

C．a great but not perfect man

D．an old-time magician小题3:Which of the following best explains the meaning of the word “baffle” as it is used in the text ?

A．To encourage people to raise questions .

B．To cause difficulty in understanding .

C．to provide a person with an explanation .

D．To limit people’s imagination .小题4:What is the purpose of writing these three texts ?

A．To make the books easier to read

B．To show the importance of science

C．To introduce new authors

D．To sell the books .

电流表是用来指示（）充放电电流强度。

A.发电机

B.蓄电池

C.起动机

D.用电设备

排尿困难包括哪几项

A．尿线变细

B．排尿时间延长

C．排尿射程缩短

D．小便滴沥

E．尿失禁