观察对象:明明观察时间:2015年5月发生了什么:孩子们最近在科学区玩起了乒乓球穿管道的游戏。今天,你又来到了科学区,你和冉冉迅速用5节粗水管拼出了一个管道,管道口接在泡沫容器上,你拿来了一根细管充当发射器,在管道一头装入球,使劲一撸,乒乓球迅速通过管道到达冉冉一端,落入盖子里。你和冉冉都笑了。成功!球落入目的地。你将管道转动,使先前的一截管道竖起,把洞口作为起点,然后 Observer: Obviously Observed Time: May 2015 What happened: Children recently played ping-pong ball-and-pipe games in the Science District. Today, you come to the Science District, you and quickly quickly spell out a pipe with five crude pipes, the mouth of the pipe connected to the foam container, you took a thin tube as a launcher, a pipe into the ball , Hard one 撸, ping-pong quickly through the pipe to reach the end, fall into the lid. You are laughing slowly. Success! The ball falls into the destination. You turn the pipe so that the previous pipe is erected, the hole as a starting point, and then