Today is October 4th．It's World Animal Day．Gina  and her sister Sally go to the____early．They want to do some things for the____there．In the south of the zoo，Gina finds an elephant．Its____ are kind of dirty．Gina and Sally get some____and clean them．After that they get some food for this elephant．After the elephant eats the food，the two girls take a photo with it．Then they play with it．

    This elephant is____．It can draw．It can play soccer,too．Gina and Sally like it very much．Gina and Sally play with it for a long time．They have a great time in the zoo．

电影院第一排有m个座位，后面一排都比前一排多1个座位．第n排有（　　）个座位．

下列叙述正确的是（   ）

小明在实验时连接了如图所示电路，闭合开关后他看到灯泡L₁发光，L₂不发光，电压表有示数．关于电路中L₁、L₂的连接方式和L₂不发光的原因，以下判断正确的是（　　）

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