论文部分内容阅读
我家那只背上有一块大黄斑的乌龟平常部是懒懒地在院子里晒太阳,这几天它突然喜欢上了跑步。它的举动引起了我和爸爸的兴趣,想要测试一下乌龟的速度。我把乌龟放在一块空地上,在它前进方向的旁边摆了一把皮尺,手上拿着手机,调到秒表的功能准备计时。“这样就可以计算出乌龟的速度了。”我信心十足。可是,我没想到,乌龟爬了2分45秒就不动了,它停在皮尺上20分米处不再前进。这时,爸爸过来问我:“乌龟的速度是多
The back of my house with a big toothed turtle usually lazily basking in the yard in the past few days it suddenly like to run. It’s move caught the interest of my father and I want to test the speed of the turtle. I put the turtle in an open space, put a tape measure beside it in the direction of progress, holding a cell phone in my hand and adjusting to the function of the stopwatch to prepare the watch. ”So you can figure out the speed of the turtle. “ I am confident. However, I did not expect that the turtle climbed for two minutes and 45 seconds and did not move. It stopped at 20 meters on the tape measure and stopped moving forward. At this time, my father came to ask me: ”The speed of the tortoise is much