用雷达写一篇作文【一】
Dear teacher,
We\'ll have a class meeting this afternoon. All of us students hope that you can attend it. Please accept our sincere invitation.
In the class meeting, we will make some plans about all the subjects, including English. We do have some puzzles and we need your help. So we hope you can set some time aside to be with us in the class meeting. We will feel honored if you can come to attend our class meeting.
Looking forward to your coming.
Yours
XXX
用雷达写一篇作文【二】
Dear Mr Wang:
We are so pleased that you are willing to share our views.
In the course of the general revision,What we need is solid foundation. Methods are vital,so could you please introduce some learning keys?We think it can help us much better.
Could you please teach us slower? We should have time to understand everything we learnt .Then we can learn the nature not the surface.
We also need to practice the important and easily wrong difficulties again and again. And we won\'t get puzzled when we meet the similar questions.
Doing homework is a way to make sure if all of us can control the knowledge.We hope that there will be less homework in order to increase the quality.
Besides,inspire us more and we\'ll do better than before.
Yours,
Li hua
用雷达写一篇作文【三】
今天，在老师的带领下我们学习了《蝙蝠和雷达》这篇课文。
这篇课文的主要内容是讲科学家从蝙蝠身上得到启示，经过多次试验研究，由此发明了雷达。你也许会问吧：蝙蝠和雷达可以说是“八竽子打不着”，它们怎么会有牵连呢?好了，我来告诉你吧，你在电视里或许看到过一些蝙蝠在夜晚飞出洞穴去寻找食物吧，可你见过它们碰到障碍物上吗?
没有吧，你知道这是怎么回事吗?原来，蝙蝠有一套可以在夜间安全飞行的“秘密武器”使它不会与障碍物相撞。科学家经过试验得知了这个答案，而且发现，蝙蝠夜间飞行并不是靠眼睛，而是靠它们的嘴巴和耳朵配合指挥路的。因为蝙蝠的嘴巴可以发出一种人类听不到的声音，叫超声波。这种超声波像波浪一样推到前方，超声波遇到障碍物又传回蝙蝠的耳朵里，蝙蝠便得知前方有障碍物，并绕道而行。所以蝙蝠能安全地在夜空飞行。 三眼看世界
从这篇课文中我明白了，大自然的\'力量真伟大，它就像人类的好老师一样，无时无刻不在给我们启示。
用雷达写一篇作文【四】
DearAmy:
How are you? I guess it’spretty tiring to correct all that homework, I wonder if there areany shortcuts?
As a new teacher for ourclass, I think maybe you would like to know a few things about ourclass.
Um…… firstly, maybe you would like a real goodassistant. I recommend agirl, her English name is Amy too, Amy Lin. She’s really good atprocessing details, and, yes, carrying stuff (but not too much.She does everything really fast, and can leave enough timeleft.
Secondly, you might need a student-tutor, astudent that teaches other students. Well, I think a student whichhas “maths-craze” called Eric well be fit for the job. Hecan get good English grades as well, also, he loves helping otherswith their studies. He wears black and blue rimmed glasses all daylong, and maybe you know him. Many boys treat him as a boss, andare willing to listen to him.
Thirdly, perhaps you’re alsolooking for a student which can entertain the class and makeEnglish classes more interesting (a class clown. Then I recommendLeo, he jokes all day long, has a great sense of humor and crazyimagination. But he isn’t a classic good student, so perhapssometimes you’ll get a bit annoyed.
It’sabout ten! Maybe I’ll have to leave the rest for nexttime.
Bestwishes!
Alyssa
用雷达写一篇作文【五】
星期六，我读了《蝙蝠和雷达》这篇文章，我的感受非常深。飞机在漆黑的夜里飞行，人们不能保证飞机是否安全，所以很担忧。但是人们知道蝙蝠也是在夜间飞行的，而且蝙蝠能很快地捕捉飞蛾和蚊子，还不会与其它东西相撞。为了弄清楚蝙蝠为什么在夜间飞行时不会受到任何伤害，科学家一共做了三次试验。第一次是把蝙蝠的眼睛蒙上，蝙蝠依然能自由飞行；后两次是把鼻子和嘴巴塞住，结果它飞行时磕磕撞撞。科学家才知道，原来蝙蝠是靠耳朵来飞行的。
科学家经过研究，知道蝙蝠的嘴里能发出一种超声波，人是听不见的，蝙蝠能听见。蝙蝠就靠它来飞行。科学家从中得到启发，给飞机装上雷达，解决了飞机在夜间安全飞行的问题。其实，在我们生活中都可以发现一些科学道理。就像苹果从树上掉下来，牛顿因此发现了万有引力；人们受鸟儿飞行的启发，发明了飞机。人类在大自然中生存，如果善于思考，善于观察，就会从大自然中得到帮助。大自然永远是人类的老师。从现在起，我要认真学习知识，长大要做一个伟大的科学家，从大自然里研究出更多有关的成果。
用雷达写一篇作文【六】
dear chen lin and li hua,
i’ve just been out of hospital for a couple of days. right now ，i am really fine, but without your support, i wouldn’t have got better so soon.
you know, the traffic accident gave me a very hard blow, both physically and mentally. in the first two weeks after my injury, i almost lost my confidence in my future life. it is the doctors’and your encouragement that rendered me much strength and determination。
anyway, i learned a lot from this unfortunate accident. i’d neverrealize how important your friendship was to me. i can’t say anymore to show my gratitude for your taking turns keeping me company,and getting me through the blue time.
next saturday, my mother would give a recovery party to thank myfriends. i really want to see you there. so, 7 o’clock at my place,ok?
your truly,
li ming
用雷达写一篇作文【七】
今天，我读了《蝙蝠与雷达》，这篇文章主要讲了：科学家模仿蝙蝠探路的方法，给飞机装上了雷达。雷达通过天线发出无线电波，无线电波遇到障碍物就反弹回来，显示在荧光屏上。驾驶员从雷达的荧光屏上，能够看清楚前方有没有障碍物，所以飞机在夜里飞行也十分安全。
读完这篇文章我懂得了：自然界中生物的本领，常常引起人们浓厚的兴趣。比如，青蛙的眼睛非常奇怪，它们看活动的东西很敏锐，可是对静止的东西却“视而不见”，人们的指挥人员在“电子蛙眼”的帮助下，能更加准确指挥飞机的降落。人们研究生物某些器官的构造和功能，从中得到启示并进行模仿，研制成功新的仪器、机械，于是产生了一种科学，就是仿生学。
