①电压表V的示数

②电流表A₂的示数

③电压表V的示数与电流表A的示数的比值

④电流表A₁与电流表A的示数的比值

阅读下面的问卷调查统计表，回答后面的问题。

志愿者对其志愿行为意义的认识（多项选择）

请用简明的语言概括两个年龄段的人对其志愿行为意义认识的同与异。

读一读，填一填。

      太阳朝我笑，niǎo____儿喳喳叫。一年级，小学生，背着新书包。唱着歌儿向前走，tiān tiān shàng____  ____ ____ 学不迟到。

   More than a hundred years ago, an American produced a game. He called it indoor tennis. The Americans were not interested in it at first so he sent it to his London friends and it became very popular in Britain.The game was then played across the dining room table, or on the floor with the net hung between two chairs. The balls were made of cork or rubber.The bats were made of wood.
   A few years later a hollow ball like the one we use today was invented. The game then quickly spread all over the world. An Englishman once made a bat covered with rubber. He first played the game in England and called it “ping-pong”. “Ping”was the sound of the bat when it hit the ball. and “pong” was the sound of the ball when it hit the table.