Now students' English handwriting（书法）gets worse and worse. That makes their teachers feel worried. Is your English handwriting beautiful? If n{#blank#}1{#/blank#} , here are four steps that really work!
Use paper with lines
      Using paper with lines can keep you writing straight i {#blank#}2{#/blank#}  of up or down when you write English words or sentences. Those lines on the paper can help you to write words in the right size. Be s {#blank#}3{#/blank#}  to fill the lined space completely. And make sure those capital letters(大写字母) are written properly.
Slow down
      If your writing is hard to read, try slowing down a little. For some kids, going slower makes the handwriting clear. If you write too q  {#blank#}4{#/blank#} , it's hard for you to stop where you should, and even worse, you may make more m{#blank#}5{#/blank#} .
Hold your pencil right
      When you hold your pencil the correct way, writing is much e{#blank#}6{#/blank#} . Some kids press down really hard when they write. That makes the handwriting not nice. Try to be relaxed and don't hold the pencil so hard. Let your writing appear nice and clean. If you do so, people will guess you are a student w{#blank#}7{#/blank#}  a good habit.
Draw more pictures
        Drawing can improve your handwriting. You need to use the skills to control your pencil better w{#blank#}8{#/blank#}  you are drawing pictures. Even though you have no chance to draw at school, you can practice by y {#blank#}9{#/blank#}  at home.
       Handwriting is very important. Imagine you are a world-famous movie star or a well-known sports player, what do you do when your f  {#blank#}10{#/blank#}  run up to you? Give them your autographs(亲笔签名), of course!

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某商店销售10台A型和20台B型电脑的利润为4000元，销售20台A型和10台B型电脑的利润为3500元．

（1）求每台A型电脑和B型电脑的销售利润；

（2）该商店计划一次购进两种型号的电脑共100台，其中B型电脑的进货量不超过A型电脑的2倍，设购进A型电脑x台，这100台电脑的销售总利润为y元．

①求y关于x的函数关系式；

②该商店购进A型、B型电脑各多少台，才能使销售总利润最大？

（3）实际进货时，厂家对A型电脑出厂价下调m（0＜m＜100）元，且限定商店最多购进A型电脑70台，若商店保持同种电脑的售价不变，请你根据以上信息及（2）中条件，设计出使这100台电脑销售总利润最大的进货方案．

某商店销售10台A型和20台B型电脑的利润为4000元，销售20台A型和10台B型电脑的利润为3500元．

（1）求每台A型电脑和B型电脑的销售利润；

（2）该商店计划一次购进两种型号的电脑共100台，其中B型电脑的进货量不超过A型电脑的2倍，设购进A型电脑x台，这100台电脑的销售总利润为y元．

①求y关于x的函数关系式；

②该商店购进A型、B型电脑各多少台，才能使销售总利润最大？

（3）实际进货时，厂家对A型电脑出厂价下调m（0＜m＜100）元，且限定商店最多购进A型电脑70台，若商店保持同种电脑的售价不变，请你根据以上信息及（2）中条件，设计出使这100台电脑销售总利润最大的进货方案．