青蛙,一种冷血动物,它的体温会受气温的影响。气温降低,青蛙的体温也会降低。它还是一种水陆两栖动物,但它大多数都藏在水里。
青蛙长着一双大眼睛,你可能认为它的视力一定很好,其实它视力很差。它根本看不见静止的物体,但是它能识别运动中的物体,特别是它喜欢吃的苍蝇和飞蛾。
青蛙是一种对农业有益的动物。青蛙特别爱吃小昆虫,善于发现运动的小昆虫。它先趴在一个小坑里,后腿蜷着跪在地上,前腿支撑,张着嘴巴仰着脸,肚子一鼓一鼓地等待着什么。一只蚊子飞过来,在青蛙面前一晃,青蛙身子猛地向上一蹿,舌头一翻,又落在地上,蚊子不见了,它又原样坐好,等待着下一个猎物的到来。
青蛙身体如此之小,但它却是一位运动健将。当你靠近它时,它就会猛地一跳,跳到那飘浮着浮萍的池塘里。这一跳,足足有它体长的20倍距离,然后,它用一个标准的蛙泳姿势,向对岸游过去。
青蛙的舌头很奇特。它的舌头可分泌出许多唾液,这些唾液黏性很强,很容易黏住猎物。它的舌头很长,可达到7-8厘米,也很软,这使得它的.舌头很灵活很敏捷。另外,它的舌头很强壮,可举起它体重1。4倍的东西,就像人类用舌头托起冰箱一样。
青蛙很喜欢鸣叫。一只青蛙躲在草丛里,偶尔鸣叫几声,另一只青蛙也会随着它叫几声,好像在对歌似的。特别是在夏天的雨后,一群青蛙“呱呱——呱呱”的叫个不停,好像是在开演唱会似的。
青蛙真是一只神奇而有趣的动物。
上次家里突然停电,屋里一片漆黑,妈妈只好拿出了她18年前买的蜡烛,为了应对以后还出现这种情况,妈妈特意买了一个应急手电筒,就让我来介绍一下它吧。
手电筒是黑色的,很小巧,大约12厘米长。前面稍大些的部分是灯头。圆圆的手柄尾部有一个一键开关,旁边还有一个USB快充接口。
按照使用说明书,妈妈首先给连接USB给手电筒充电,正在充电中的时候会显示红灯,充满后红灯会自动熄灭。
充完电之后我兴奋地试了试它的功能。按一次一键开关,手电筒便亮灯了,如果把灯头位置的伸缩装置往前面拉,手电筒照亮的范围就会缩小,反之,照亮范围就变大了,而且灯光也非常耀眼,就像是汽车的远光灯。连按两次开关,灯光会一闪一闪,如果在黑夜出现紧急情况,可以引起别人注意或作为求救信号。按三次开关又会怎样呢?我试了一下发现这次的灯光更加耀眼,照亮的范围更广了。我试着把家里的灯关了,结果发现整个房间里都亮了。怎么会这样呢,仔细一看,原来这次发光的地方是在手电筒的手柄位置,灯光是由一个长方形的芯片发出来的。
没想到这样一个小东西,还有这么多的功能。虽然没停电,但我已经开始期待天黑时带着它出去玩了。同学们,你们是不是也想和我一起来试试呀?
以前,冰箱常见的有长方形、正方形等,不过如果你现在再去一趟商场,还可以发现很多可爱的造型:小熊形、超人形……听店主介绍,这些新造型很受年轻人的欢迎。
冰箱的颜色虽然没有彩虹那样绚烂、多姿多彩;也没有花朵那样五颜六色;但冰箱有一种朴素之美。不过现在也有彩色的冰箱了(赤、橙、黄、绿、青、蓝、紫等。
冰箱可以存放食品。它一般分为两层,第一层是冷藏室,专放水果、蔬菜等……第二层是冷冻室,可以放生的荤菜,如鱼、肉,海鲜等,也可以放饮料……冰箱不仅可以存放食品,还可以存放化妆品。听说,有些爱美的女性把化妆品存放在冰箱里。据说,这样保存的化妆品对皮肤更有效。
冰箱为我们带来了什么便利呢?请认真、仔细地阅读下文哦!
我们可以把买来的食品放在冰箱里,那样就不用担心放在外面的食物因变质,而不能食用了。冰箱不止给我们带来了这么一点便利,还有呢?
侧耳聆听:
你是否听见了有冰箱的家庭,孩子们感叹声呢?
他们感叹冰箱能让冰淇淋保持冰凉;
在自己吃时,感到全身凉爽。
……
你再听听,没冰箱家庭中孩子们的烦恼?
他们正在想:棒冰买回来,必须在当天吃完。
买得太多,怕吃不完而融化、浪费。
买得太少,又怕不过瘾。
……
这就是冰箱带给我们生活中的便利……
冰箱只是暂时存放物品的地方,可不是万无一失的“保险柜”哦!长期把食品放在冰箱里,也会变质的,所以要尽快把买来的东西食用。天气热了,冰箱使用的次数逐渐增高。“乒乒乓乓”又是哪一户人家在用冰箱啊?经常打开冰箱的门,这样既浪费电,又影响冰箱的使用寿命。
冰箱是人类生活中的好帮手,少了它,人类一定会多出许多烦恼与浪费!
Dear Family,
You must be greatly surprised when you get this letter, not from anyone else but from your dearest son, since I have never written a letter for ages in such a traditional way. The purpose of my writing is not so much to express my gratitude for bringing me up, as it is to tell you something about my college life.
It has been more than two years since I started my college life and I have adapted myself to the new environment here, even though at the very beginning, I was not quite used to it. My classmates are pretty friendly and they offer to help me whenever need be, which is really precious for me. My teachers tell me the differences between college life and high school life and give me some necessary advice on how to learn in college. Because of their kind-hearted help, I learn to know the importance of cooperation and communications between each other, especially when in Group work.
In the past several months, I have been busy preparing for TEM 4.Therefore, most of the time, I stayed at school and seldom kept in touch with you; I should have been ashamed of this. But now it is completely finished, and I will never do that again. In my spare time, I usually go to play basketball to keep fit since you always ask me to practice more to keep healthy. What is more, I like to go to the English Corner to practice my spoken English in order to improve my oral English level, which is of importance as English major.
Finally, I would like to specially thank you for providing me the best education and experience. Without your support and understanding, it wouldn't be the same. In regard to the future, I will make every effort to study for my degree and make the dreams I had envisioned come true.
Take good care of yourselves as you have asked me to.
Best regards,
Jay
5,3
© 2022 xuexicn.net,All Rights Reserved.