若把代数式x²﹣2x+3化为（x﹣m）²+k形式，其中m，k为常数，结果为（　　）

材料一：李鸿章多次强调“筹办海防，欲与洋人争衡，非治土寇可比，必须时加戒备。方今强邻环逼，藩属倾危，岂可稍存侥幸无事之心。顿忘厝火积薪（把火放到柴堆下面。比喻潜伏着很大危险）之诫。”“日本狡焉思逞，更甚于西洋诸国，今所以谋创水师不遗余力者，大半为制驭日本起见。”

——节选自李侃《中国近代史》（第四版）

材料二：日本深知，欲侵占朝鲜，必须战胜中国，甚至灭亡中国。日本军内提出的总目标首先是击败北洋舰队。于是日本加快建设海军，明治天皇下令每年从内库拨款30万元建造舰艇。为造舰，天皇谕令节省宫廷费用，文武官员缴纳薪俸十分之一。而中国则相逆而行，截取海军经费去修颐和园，使海军建设处于停顿状态。

——两岸新编中国近代史晚清卷

    Garbage collector Jose Gutierrez is 53 years old. When he was young his family was too poor to keep him in school. Jose left school when he was in Grade Two, but that did not stop him having a love for reading.

    Jose said he got the love of reading from his mother. “She read me stories every night,” said Jose. He hopes that every poor child in his city can have books to read. Jose started saving books from garbage twenty years ago. Every day he drives the garbage truck through the city's rich neighborhoods to get old books. Now there are about 20,000 books in Jose's small house. It is already a famous library.

    Books are rare things for children in poor neighborhoods. New books are too expensive. There are nineteen libraries in Bogota, the city where Jose lives, but they are all far from poor neighborhoods.

    Now Jose is famous in Bogota. Many people give old books to him. Jose plans to make more libraries to help more children.

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