右图是吴淞铁路公司于1876年发行的“铁路火轮车”招贴画。据记载，当“火轮车”通车时，人们纷纷涌来，争相乘坐。图文材料说明（  ）

解：设S=1+2+2²+2³+2⁴+…+2²⁰¹²+2²⁰¹³，将等式两边同时乘以2得：

    2S=2+2²+2³+2⁴+2⁵+…+2²⁰¹³+2²⁰¹⁴

    将下式减去上式得2S﹣S=2²⁰¹⁴﹣1

    即S=2²⁰¹⁴﹣1

    即1+2+2²+2³+2⁴+…+2²⁰¹³=2²⁰¹⁴﹣1

仿照此法计算：1+2+2²+2³+…+2¹⁰⁰．

    Andy is 12 years old. He is one of my best f____. He is a top student in Class 6. But he doesn't have a good diet.

    Every morning, he doesn't eat breakfast. It isn't right. I think breakfast is very i____ for him. It helps him start the day w____. He has lots of snacks like chocolates, sweets every day. They make him fat. It's bad for his health. Andy shouldn't eat too many snacks any more. In vegetables and fruits there are many vitamins. But he h____ eating them. These days he doesn't feel good.

    I think he needs to c____ his diet. And he needs to exercise more. I'm sure he'll be better.

4月25日，尼泊尔发生8.1级地震，该国地处（    ）