experiment 4
新教材人教版必修一WelcomeUnit知识清单 巩固练习
必修一Welcome Unit知识清单+巩固练习***重点单词***1.exchange n.交换，交流vt.交易，兑换。
(1)拿......交换...... exchange ...for ...(2)与某人交换某物exchange sth with sb(3)做出交换make an exchange(4)作为......的交换in exchange for ...2.lecture n.讲课，讲座vi讲课/ vt教训、训斥3.registration n.登记；注册；挂号register vt./vi. 登记，注册；注意到vt.公开发布意见4.design n.复设计，设计方案vt. 设计，筹划designer 设计者(1)为......设计、准备be designed for(2)被设计做...... be designed to do(3)故意地by design5.nation n.国家，民族national adj. 国家的，民族的nationality n. 国籍6.formal adj.正式的informal adj. 非正式的7.anxious adj. 焦虑的；不安的anxiety n. 焦虑；不安(1)为......忧虑、担心be anxious about/for(2)渴望做......急于做...... be anxious to do8.annoy vt.使恼怒；打扰annoyed adj.生气的；(1)对......生气be annoyed with...(2)被......烦扰be annoyed at...(3)对......感到不快be annoyed by...9.frightened adj. 受到惊吓的；害怕的frighten v. 使惊吓；使惊恐frightening adj. 令人恐惧的fright n. 惊吓(1)吓走、吓跑frighten off/away (2)恐吓某人做某事frighten sb into doing sth(3)吓得要死be frightened to death(4)害怕地in fright10. senior adj.& n.级别高的、年长的人-- junior 地位低下的，职位低的人、青少年(1)比、年长/幼；比......职位高/低be senior/junior to ...(2)比......年长/幼多少岁be senior/junior to sb by ... years11.impress vt.使钦佩,给......留下深刻的好印象vi. 留下印象；引人注目impression n. 印象；感想impressive adj. 令人难忘的(1)某事给某人留下深刻的印象impress sb with sth(2)对......印象深刻be impressed with/by/at ...(3)使某人铭记......impress sth on sb==impress on sb sth(4)给某人留下深刻印象leave/make an impression on sb12.experiment n. 实验，试验；v. 进行实验(1)用......做实验experiment with sth(2)利用某人某物做实验experiment on sb sth(3)做实验do/ perform/ conduct/ carry out an experiment13.explore vt/vi. 探索；勘探exploration n. 勘探explorer n. 勘探者(1)勘探某物explore for sth14.confident adj. 自信的；有把握的confidence n. 信心；信任(1)对......有信心have confidence in...(2)对某事有把握be confident of...(3)自信地 with confidence15.newly adv. 最近、最新anise vt. 组织；筹备；安排；vi.组建；成立organizer n. 组织者organization n. 组织；团体；机构17.goal n. 目标；球门；射门(1)达成某人的目标achieve one’s goal(2)设立目标set a goal(3)进球得分scored a goal18. curious adj. 好奇的；求知欲强的(1)对......感到好奇be curious about...(2)好奇做某事be curious to do sth(3)满足某人的好奇心meet one’s curiosity(4)出于好奇out of curiosity(5)好奇地with curiosity19.improve vt/vi. 改善，改进improvement n. 改善pany n. 公司vt. 陪伴21.concentrate vt./vi. 集中注意力concentration n. 集中注意力(1)把注意力集中在......concentrate/fis/focus( one’s attention) on...(2) 全身心地投入......put one’s heart into ...(3)专心于......致力于......be devoted to (sth./doing)22.person n. 个人personal adj. 私人的，个人的personality n. 个性23.style n. 风格，方式，作风come into style 流行起来，变得时髦have no style 毫不突出，十分平常in style 时髦的(地)，合时尚(地)；华丽的(地)，有气派的(地) 很成功地out of style 不时兴的，不时髦的That's the style. [口语]应该如此，对头。
experiment 4
实验目的
1、动态对象的创建
设计并实现利用new和delete运算符动态创建和 清除对象的程序。
Harbin Engineering University Computer Science & Technology
2
实验题目
1.编写一个程序，该程序建立一个动态数组 ，为动态数组的元素赋值，显示动态数组的 值，并删除动态数组。
Harbin Engineering University Computer Science & Technology
4
实验题目
2
8
19
实验3 要求：
4
32
5 20 1 45
1、建立树节点类用于存储 左图的树； 2、动态创建树节点数组； 3、按照深度遍历依次动态 创建树节点并存入数组中；
Harbin Engineering University Computer Science & Technology
学号 20112001
课程号 c001
分数 92
c002
c003
操作系统
数据库原理
20112001
20112002 20112003
c002
c003 c002
89
78 90
实验2 具体要求： 1、分别建立Student，Course，Score三个类表示上述三个表的结构； 2、分别建立Student，Course，Score三种类型的数组，动态创建Student， Course，Score对象分别为每个数组赋值； 3、根据三个表的信息输出学生的成绩，格式如下： 学号 姓名 课程名称 分数 20112001 王雪 数据结构 92 20112001 王雪 操作系统 89 …… 20112003 卢萌 操作系统 90
四年级科学小实验英语阅读理解25题
四年级科学小实验英语阅读理解25题1<背景文章>Have you ever done an interesting experiment? Let's talk about an experiment with vinegar and baking soda. First, we need to prepare some materials. We need a bottle of vinegar, a spoonful of baking soda and a container. Then, pour the vinegar into the container. Next, carefully add the baking soda to the vinegar. What happens? You will see a lot of bubbles coming out. This is because when vinegar and baking soda mix, they produce a chemical reaction. The gas produced by this reaction is carbon dioxide.1. What materials do we need for the experiment?A. Water and sugar.B. Vinegar and baking soda.C. Oil and salt.D. Milk and honey.答案：B。
解析：文章中明确提到做这个实验需要一瓶醋、一勺小苏打和一个容器，所以答案是B。
2. What do we do first in the experiment?A. Add baking soda to vinegar.B. Pour vinegar into the container.C. Mix water and sugar.D. Heat the container.答案：B。
Unit5单元复习课件+2024-2025学年冀教版九年级英语全册+
Lesson27 Planet
重点单词: 1.unless 除非;如果不 2. certainly 当然 3. double 双倍(的) 4. telescope望远镜 5. solar 太阳的;关于太阳的 6. mystery 神秘事物;奥秘 重点短语: 1. even if 即使;纵然 2. solar system 太阳系 3. at night 在夜间;在晚上 4. look through透过……看 重点句子: 1.我告诉我爸爸我们正在研究太阳系。
Danny
I told my father that we were studying the solar system. 2.丹尼把望远镜转过来,又通过它看了看。 Danny turns the telescope around and looks through it again. 3.星星在晚上出来。 The stars come out at night. 4.也许晚饭后布莱恩和我可以加入你的行列。 Maybe Brian and I can join you after supper. 5.我认为你不能找到一颗(行星)，除非你有一架更大的望远镜。 I don't think you can find one, unless you have a bigger telescope.
Lesson29 DNA—The Story of You
重点单词: 1. repeat 重复 2.grandson 孙子;外孙 3.general一般的;普遍的 4. granddaughter 孙女;外孙女 5.instruction 说明 plex 复杂的 7. identify 确认;鉴别 8. related 有关的;相关的 9.pattern 模式;形式 10.blueprint蓝图 重点短语: 1. in general一般而言;通常 2. except for 除……之外 3. be related to 与……相关 4. billions of 数十亿计的;大量 5. not only ... but also..不但……而且.…
2024年高考英语一轮复习(新人教版) 第1部分 教材知识解读 必修第一册 Welcome Unit
Ⅰ.认阅读单词1．sex n．性别2．female adj.女(性)的；雌的n．雌性动(植)物；女子3．male adj.男(性)的；雄的n．雄性动(植)物；男子4．guy n．小伙子；男人；家伙5．strategy n．策略；策划6．personality n．性格；共性Ⅱ.记重点单词1．exchange n．& v t.交换；沟通2．lecture n．讲座；讲课；教训v i.(开)讲座；讲课v t.训斥3．campus n．校内4．senior adj.级别(或地位)高的n．较年长的人5．outgoing adj.爱交际的；外向的6．experiment n．试验；试验7．awkward adj.令人尴尬的；难应付的8．junior adj.地位(或职位、级别)低下的n．职位较低者；(体育运动中)青少年9．forward ad v.向前；前进adj.向前的；前进的10．flash n．光；信号v i.& v t.(使)闪烁；发出(信号)11．goal n．目标；球门；射门12．partner n．同伴；配偶；合伙人13．company n．公司；陪伴14．style n．方式；作风Ⅲ.知拓展单词1．registration n．登记；注册；挂号→register v t.& v i.登记；注册2．nationality n．国籍；民族→nation n．国家；民族；国民→national adj.国家的；民族的3．design v t.& n．设计→designer n．设计者4．formal adj.正式的；正规的→formally ad v.正式地→informal adj.非正式的5．anxious adj.焦虑的；担忧的→anxiously ad v.焦虑地→anxiety n．焦虑6．annoy v t.使愤怒；打搅→annoyed adj.愤怒的；生气的→annoying adj.令人愤怒的→annoyance n．愤怒7．frightened adj.惊吓的；可怕的→frightening adj.令人可怕的→frighten v t.使可怕；使惊恐8．impress v t.使鄙视；给……留下深刻的好印象v i.留下印象；引人注目→impression n．印象；感想→impressive adj.令人印象深刻的9．concentrate v i.& v t.集中(留意力)；聚精会神→concentration n．集中；认真10．explore v t.& v i.探究；勘探→exploration n．探究→explorer n．勘探者；探险家11．confident adj.自信的；有把握的→confidence n．信念；信任12．organis(z)e v t.组织；筹备；支配；组建v i.组建；成立→organis(z)ation n．组织；团体→organis(z)er n．组织者13．improve v i.& v t.改进；改善→improvement n．提高；改善14．curious adj.古怪的；求知欲强的→curiously ad v.古怪地→curiosity n．古怪(心)；求知欲15．revise v t.& v i.修改；修订；复习→revision n．复习1．abandon v t.放弃；抛弃；遗弃2．abnormal adj.反常的3．abolish v t.废除；废止4．abruptly ad v.突然地；意外地5．abstract n．摘要adj.抽象的6．absurd adj.荒谬的；可笑的7．abundant adj.大量的；充分的；丰富的8．accelerate v t.& v i.(使……)加快；加速Ⅳ.背核心短语1．senior high school(美国)高中2．at last最终；最终3．make an impression留下好印象4．concentrate on/upon集中精力于5．leave...alone不打搅；不惊动6．junior high school(美国)初级中学7．look forward to期望；期盼8．take notes记笔记9．make friends交伴侣10．come out消灭，露出Ⅴ.悟经典句式1．What if no one talks to me？(What if...？)要是没人和我说话怎么办呢？2．I found most of my classmates and teachers friendly and helpful.(find＋宾语＋宾补)我觉得我的大多数同学和老师都很友好，而且乐于助人。
英语牛津版四下第三单元实验作文
英语牛津版四下第三单元实验作文全文共6篇示例，供读者参考篇1Unit 3: Fun Experiments!Hi there! My name is Jerry and I'm 10 years old. I really love science and doing experiments. In our English class, we just started the third unit all about cool experiments you can do at home. Our teacher Mrs. Martin says experiments help us learn about the world in a hands-on way. I can't wait to try some of these!The first experiment we learned about was how to make a baking soda and vinegar volcano. I've seen videos of these before and they look awesome! You just need a few simple ingredients like baking soda, vinegar, dish soap, and food coloring. First you build a little volcano shape using modeling clay or playdough. Then you put some baking soda in the crater at the top. When you pour vinegar and a few drops of dish soap over it, the baking soda and vinegar react to create a coollava-like eruption! The dish soap makes it extra foamy. You canuse food coloring to make your lava different colors too. I can't wait to erupt my own volcano!Another neat experiment is making bouncy eggs. Have you ever wondered what would happen if you soaked an egg in vinegar? Well, the vinegar actually dissolves the hard shell away! But it leaves a rubbery membrane around the egg so it gets all bouncy. You just need a jar, vinegar, and some eggs. Leave the eggs soaking for a day or two and the shell will be gone. Then you can gently rinse off the vinegar and bounce your eggs! Just be careful not to drop them too hard or they'll crack. My friend Timmy says he's going to try bouncing one off his head...but I don't think that's a very good idea.One of the messier experiments is making oobleck or gak. This crazy non-Newtonian fluid acts like a liquid when you pour it slowly, but becomes a solid if you squeeze it or hit it quickly! To make oobleck, just mix cornstarch and water together. Start with equal parts of each, then slowly add more cornstarch until you get the right gooey consistency. If you let it sit, it will become liquid again. But if you roll it into a ball in your hands, it temporarily acts solid! Super weird...it feels dry but oozy at the same time. Oobleck makes a huge mess but it's really fun to play with.Those are just a few of the cool experiments we're going to try from our textbooks. There's also making rainbows with a glass of water, bending a stream of water with static electricity, and crafting milk plastic out of milk and vinegar. Science is so fun when you get to be hands-on! I just hope my little sister Emma doesn't get into my experiments again like last time. She got oobleck in her hair and it was a nightmare to get out.Well, that's it for this unit! Back to studying. Let me know if you want to come over and do some science experiments with me sometime. I'll save you an extra bouncy egg to play catch with!Your friend,Jerry篇2Unit 3 Experiments EssayHi! My name is Emma and I'm going to tell you all about the fun experiments we did in Unit 3 of our English class. We learned about materials and did some really cool hands-on activities. Get ready for an exciting story!The first experiment was the "Absorbing Water" one. We had different materials like cotton, paper towels, and sponges. We added some water drops to each one to see which absorbed the most. I thought the sponge would win for sure since it's made for soaking up water when you wash dishes. But actually, the paper towel absorbed the most drops! The cotton was second and the sponge came in third. I was really surprised. Mrs. Adams said it's because paper towels are made of really thin materials that can soak up a lot. Who knew?Next up was the "Heat Insulators" experiment. We tested which materials were best at keeping things hot or cold. We wrapped ice cubes in different materials like aluminum foil, cloth, paper, and plastic wrap. Then we checked back after 30 minutes to see which ice cube melted the least. The winner for keeping the ice frozen was the aluminum foil. I'm not too shocked since aluminum is what they make thermos bottles from to keep drinks hot or cold. But the plastic wrap actually did a pretty good job too! The paper was the worst insulator.After that, we moved on to the "Transparent or Opaque" tests. We looked at different objects around the classroom and had to decide if light could pass through them or not. Things like windows and water bottles are transparent because you can seeright through them. But others like books and desks are opaque and block all the light. There were some tricky ones in between called translucent, like wax paper. Light can kind of pass through but not completely. Sorting everything into the three groups was a fun challenge!The "Shadow Shapes" activity might have been my favorite. We went outside on a sunny day and used our bodies to make different shadow shapes on the ground. First we just made regular human shapes. But then we started getting creative - making animals, objects, even shadow story scenes acted out! John made an awesome dinosaur shadow. Sara made a creepy ghost shadow that made us all jump. I made a shadow hand puppet and barked like a dog. Making shadows is just plain cool.For the "Strength Test," we looked at different building materials and which ones were strongest. We stacked up books, then weights, on top of materials like cardboard, tin foil, popsicle sticks, and straws. We saw how much weight each one could hold before collapsing. The straws actually held up a ton - way stronger than I thought! The tin foil was the first to get crushed. No surprise there since it's so thin and bendy. But the popsicle sticks were the real champs. Those little wooden sticks held up amassive stack of books. I learned you can't judge strength just by size!The last experiment was "Float or Sink?" We had all kinds of objects and took turns guessing if they would float or sink in a tub of water. Stuff like plastic toys, apples, and corks floated. But things like rocks, marbles, and keys just plunged straight down and sank. There were a few tomers that really surprised me though! A wooden pencil sank at first, but then started floating after soaking up some water. And a ball of aluminum foil floated even though metal is supposed to sink. Mrs. Adams said it's all about density compared to water. Very confusing but super interesting!Phew, that's a lot of experiments we covered! I had a blast with all the hands-on activities. Playing with materials, making shadows, and seeing what floats or sinks never gets old. Science is just so much fun, especially when you get to goof around while learning. I feel like a little scientist after Unit 3!So that's the full report on our latest adventures. Let me know if you have any other questions! I'm always excited to share my knowledge and love of science. Stay curious, my friends!篇3My Favorite ExperimentsHi there! My name is Jamie and I'm a 4th grader. I love science and doing experiments. It's so much fun to ask questions and then find the answers by testing things out. Our teacher Mrs. Thompson had us do some really cool experiments in Unit 3 of our Oxford English textbook. I'll tell you all about my favorites!The first one was the baking soda and vinegar experiment. We mixed baking soda and vinegar together in bottles and watched what happened. It was awesome! The mixture started bubbling and fizzing like crazy. Mrs. Thompson told us a chemical reaction was happening that makes carbon dioxide gas. We got to feel the bottles getting harder as the gas built up inside. A few students' bottles even popped their lids off with a big poof! I loved the volcano sounds it made.Next up was the balloon rocket experiment. We blew up balloons and taped a straw to the end. Then we let them go and they zoomed across the classroom! It was hilarious watching them flying everywhere. The balloons worked like mini rocket ships. Mrs. Thompson said the air rushing out the back madethem propel forward. I made mine go the farthest and was crowned the Balloon Rocket Champion!Another wacky one was the magic milk experiment. We put food coloring in milk and then dropped in dish soap. The colors started swirling and mixing in wild patterns! It looked like magic happening in the bowl. Mrs. Thompson explained the soap was reacting with the fat in the milk to make it move around. My design looked like a crazy rainbow tornado. So pretty!But I think my very favorite was the elephant toothpaste experiment. We mixed together dish soap, hydrogen peroxide, and dry yeast. Then we added a special liquid to make it blow up like an elephant making huge toothpaste foam! The foam overflowed out of the bottles in big puffy clouds. We got to wear goggles and feel the heat from the reaction on our faces. I've never seen anything froth up that enormously before. What an epic experiment!I just love science because you get to explore how the world works in such fun, hands-on ways. Mixing up formulas, watching reactions, and making messes is the best. Every experiment feels like a mini magic show. I can't wait for the next unit so we can do more wacky tests and unlock the secrets of science! Experimenting rules!篇4My Super Cool Science ExperimentHi! My name is Lily and I'm going to tell you all about the totally awesome science experiment I did for school. It was so much fun and I learned a bunch of really neat stuff!For our experiment, we had to test different materials to see which ones are insulators and which ones are conductors. An insulator is something that doesn't let electricity flow through it very well. A conductor is the opposite - it lets electricity flow through easily.Before we started, my teacher Mr. Johnson gave us a quick science lesson about electricity and conductors and insulators. He said electrons need to be able to move freely for electricity to flow. In insulators, the electrons are stuck in place so electricity has a really hard time getting through. But in conductors, the electrons can zoom all around and carry the electrical energy.Mr. Johnson said the best conductor is metal because the electrons in metal are basically free to roam around. Other good conductors are carbon and salt water. Insulators are things like plastic, rubber, glass, wood, and dry air. He told us we weregoing to test a bunch of different household materials to see if they were insulators or conductors.For our experiment, we used a simple circuit with a battery, a light bulb, and some alligator clip wires. If the light bulb lit up when we added a new material to the circuit, that meant the material was a conductor and let electricity flow through. If the light bulb didn't come on, it was an insulator.The first thing I tested was a paper clip. I bent one end of the paper clip into a little loop and attached it to the circuit with the alligator clips. As soon as I connected it, the light bulb turned on! The paper clip was definitely a conductor because it's made of metal. Metal is such a great conductor that even tiny things like paper clips can carry electricity.Next, I grabbed a pencil and tried putting the graphite core into the circuit. Sure enough, the light bulb lit up again! Graphite is a form of carbon which can conduct electricity quite well. I thought that was really neat.After that, I picked up a plastic drinking straw. I made sure to bend the end a little so it would touch both the alligator clips when I put it in the circuit. But when I connected it, the light bulb stayed completely dark. Just like Mr. Johnson said, plastic is an insulator so no electricity could travel through the straw.I decided to test some other things I had in my pencil case like a rubber eraser and a Popsicle stick. The eraser didn't conduct at all since rubber is an insulator. But the Popsicle stick actually let a little bit of electricity through! I figured out that was because the stick was made of wood which can conduct just a tiny amount sometimes.For my next batch of materials, I grabbed a handful of coins from the jar of change I keep on my desk. I made sure to test all different kinds - pennies, nickels, dimes, and quarters. Every single coin lit up the light bulb nice and bright no matter if it was copper, nickel, or any other metal. Metals are such awesome conductors!Then I took a metal fork from my lunchbox and tried that. Obviously it conducted electricity because it's made of metal. But I noticed that the thicker part of the fork conducted better and made the light bulb shine brighter than the skinny tines did. I'll have to ask Mr. Johnson why that is!After the fork, I found an old thread spool with some yarn still on it. When I put it in the circuit, the light bulb stayed off. The thread was an insulator just like Mr. Johnson taught us fabric would be.For my last few materials, I decided to bring some food from the kitchen! First, I grabbed a chunk of cheese to test. It didn't conduct at all - the light bulb stayed completely dark. I guess cheese is an insulator.Next, I took a slice of bread and ripped off a small piece to put in the circuit. It didn't let any electricity through either. I'm glad bread is an insulator - otherwise my toaster could electrocute me!Finally, I poured a little bit of salt water into a cup and used the alligator clips to make contacts in the water. As soon as I connected it to the circuit, the light bulb came on nice and bright! Salt water is a fantastic conductor because of all the dissolved ions that can carry electrical current. Fresh water doesn't conduct nearly as well.When I was finished testing all my materials, I made a chart to keep track of which ones were insulators and which ones were conductors. Here's what I wrote down:Conductors: Paper clip, pencil graphite, coins, metal fork, salt waterInsulators: Plastic straw, rubber eraser, thread, cheese, breadI had such a blast doing this experiment! It was amazing to test so many different things and see whether or not they could conduct electricity. I feel like a real scientist now. I can't wait until we get to do another cool experiment like this!篇5My Super Cool Science Experiments!Hey friends! I'm so excited to tell you all about the awesome experiments we did in English class. We learned sooooo many interesting things about science and nature. Get ready for some serious fun!First up, we studied plants and how they grow. Did you know that plants need sunlight, water, and nutrients from the soil to survive? Wild, right? Our teacher brought in some bean seeds and we got to plant them ourselves. We put the seeds in little cups with soil and covered them with plastic wrap to keep the moisture in. Then we put our cups near a sunny window and waited...After a few days, I noticed some teeny tiny sprouts poking up through the soil! It was the coolest thing ever. Over the next couple weeks, the sprouts grew taller and taller until they were full fledged little bean plants. We measured them with a rulerand recorded the growth. Mine ended up being 18 centimeters tall! Go plant go.But that's not all we learned about plants. We also discovered how important bees are for their growth. Bees and other insects like butterflies fly around and pollinate flowering plants so they can make fruits and seeds. Without bees, a lot of crops wouldn't be able to grow. We'd have way less tasty foods! I never realized how hard those little buzzers work.Speaking of buzzing insects, the next experiment was all about ants. Our teacher put a little ant farm habitat thingy on her desk so we could watch a colony of ants tunnel underground. It had a gel stuff instead of real dirt, but the ants still dug tunnels and little rooms just like they would outdoors. So cool!We observed how the worker ants are always busy digging new tunnels and carrying food back to feed the colony. The bigger ants called "soldiers" guarded the entrance and protected the nest. At the bottom there was even a special ant nursery chamber where the babies grew up. I had no idea ant families were so organized!After plants and insects, we moved on to another experiment about liquids and solids. We took ice cubes and placed them out in the warm classroom to watch them melt. Igot to measure the frozen cube and the melted liquid to see the difference. They start out as solid hard ice but slowly turn into liquid water over time when they get warm. Crazy how that happens right?We also mixed some solids into liquids to make solutions. We put sugar in warm water and stirred it around until the sugar dissolved and blended in. Then we tasted it... sugary and sweet! Doing little hands-on tests like this helps me understand scientific concepts so much better than just reading about them.My favorite experiment of all though was the one about magnets. Our teacher gave each of us a magnetic wand and a bunch of metal objects like paperclips, nails, bottle caps, and other cool stuff. We got to wave our magnetic wands around and watch which objects got attracted to the magnet and which ones didn't. The fun part was trying to pick up as many objects as possible using just the magnetic force!I built a little sculpture out of magnets, paperclips, and bottle caps that actually stood up on its own. At one point I had like 20 paperclips stuck to my wand in a long chain! I didn't realize magnets were sooooo strong. Apparently the stronger a magnet is, the more objects it can attract from farther away. I want to get some big magnets to experiment with at home.That's just a quick peek at some of the awesome things we learned. Our teacher made science super engaging with all the hands-on activities and visuals instead of just reading from a textbook. Even though some concepts are pretty complicated, the experiments broke everything down in a way that was easy to understand. I can't wait for more wacky science adventures next term!Welp, that's all I've got for today friends. Hopefully you found my rambling semi-coherent and mildly entertaining. Let me know if you have any other burning science questions and I'll do my best to drop some knowledge Later taters!篇6A Super Fun Science Experiment!Hi! My name is Amy and I'm 10 years old. I go to Maple Grove Elementary School. Today I'm going to tell you all about the totally awesome science experiment we did in Mr. Wilson's 4th grade class. It was the coolest thing ever!A few weeks ago, Mr. Wilson said we were going to be scientists and do a experiment to learn about chemical reactions.I was really excited because science is my favorite subject. I love doing hands-on activities and finding out how things work.First, Mr. Wilson explained what a chemical reaction is. It's when you mix different substances together and they become something new with totally different properties. The ingredients don't stay the same - they change into a new product through a chemical process. Neat, right?Then he showed us some examples of common chemical reactions like burning a match, baking cookies, and digesting food. My best friend Zack raised his hand and asked if explosions were chemical reactions too. Mr. Wilson said yes, explosions definitely involve chemical changes! We all thought that was super cool.After going over the basics, Mr. Wilson said we were each going to get a chance to make our own chemical reaction happen. The experiment was going to be making little volcanos erupt with lava! How awesome is that?To get started, Mr. Wilson passed out these tiny volcano models to each group. They were made of clay with a hollow crater in the middle. We used red and yellow paint to decorate the volcanos and make them look more realistic.Next, we had to prepare the "lava" mixture that would make the volcanos erupt. The ingredients were:Baking sodaRed food coloringDish soapVinegarFirst we added the baking soda and food coloring to a cup and used a spoon to mix it up into a red paste. Then Mr. Wilson helped us carefully pour in the vinegar and dish soap.As soon as the vinegar hit the baking soda, an amazing reaction started happening! The mixture immediately started fizzing and bubbling up like crazy. Red bubbly "lava" overflowed out of the cups and looked just like a real volcano erupting.We quickly scooped up the lava mixture with spoons and packed it into the craters of our clay volcanos. More and more red fizzy lava oozed out, spilling down the sides. A few groups added a extra baking soda on top for an even bigger volcanic explosion.Our whole classroom filled up with the coolest shades of red bubbles and foam as all the miniature volcanos continuously erupted. It looked like an entire volcanic island was blowing up right on our desks! Some of the lava even started dripping onto the floor.Mr. Wilson told us the baking soda and vinegar were having an acid-base reaction. The vinegar is an acid, and when it combined with the baking soda (a base), it created carbonic acid. Carbonic acid is very unstable, so it instantly broke apart into carbon dioxide gas. The gas bubbles fizzing out caused all the erupting action we saw.After the lava stopped flowing, we got to take our volcanos home. I put mine on my bedside table as a slimy decoration. Every time I look at it, I remember what an epic science day that was.I can't wait until our next experiment! Maybe we'll grow rock candy crystals or build code robots. Whatever it is, you can be sure I'll have a ton of fun learning and doing science activities. Bring on the explosions!。
剑桥雅思听力材料 4 手打 可打印
Text2:Section: 11-5 choose the correct letter: A, B, C1.What dose Peter want to drink?A teaB coffeeC a cold drink2.What caused Peter problems at the bank?A the exchange rate was downB he was lateC the computer weren’t working3.who did Peter talk to at the bank?A an old friendB an American manC a German man4.Henry gave Peter a map ofA the cityB the bus routesC the train system5.what do Peter and Sally decide to order?A food and drinksB just foodC just drinks6-8: complete the notes below using words from box.Tourist attractions open all day: 6 and Gardens Tourist attractions NOT open on Mondays: 7 and Castle Tourist attractions which have free entry: 8 and Markets9-10 completes below, no more than three words.9. The first place Peter and Sally will visit is the10. At the Cathedral, Peter really wants toSection: 211. The Counselling Service may contact tutors ifA they are too slow in marking assignmentB they give students a lot of workC they don’t inform students about their progress12. Stress may be caused byA new teachersB time pressureC unfamiliar subject matter13. International students may find stress difficult to handle becauseA they lack support from family and friendsB they don’t have time to make new friendsC they find it difficult to socialize14. A personal crisis may be caused byA studying for too long overseasB business problems in the student’s own coutryC disruptions to personal relationships15. Students may lose self-esteem ifA they have to change coursesB they don’t complete a courseC their family puts too much pressure on them16. Students should consult Glenda Roberts ifA their general health is poorB their diet is too strictC they can’t eat the local food17. Students in financial difficulties can receiveA assistance to buy booksB a loan to pay their course feesC a no-interest loan o cover study expenses18. Loans are also available to students whoA can’t pay their rentB need to buy furnitureC can’t cover their living expenses19. The number of students counseled by the service last year wasA 214B 240C 2,60020. The speaker thinks the Counselling ServiceA has been effective in spite of staff shortagesB is under-used by studentsC has suffered badly because of staff cutsSection: 321-24 completes below, no more than two words and/or a number25-26 choose TWO letters A-EWhat TWO disadvantages of the questionnaire form of data collection do the students discuss?A The data is sometimes invalidB Too few people may respondC It is less likely to reveal the unexpectedD It can only be used with literate populationsE There is a delay between the distribution and return of questionnaires27-30 complete the table below, no more than 3 words or a numberSection: 331-32 choose31 Corporate crime is generally committedA against individualsB by groupsC for companies32 Corporate crime does NOT includeA employees stealing from their companyB unintentional crime by employeesC fraud resulting from company policy33-38 complete, no more than three words39-40 choose two lettersThe oil tanker explosion was an example of a crime whichA was no-one’s faultB was not a corporate crimeC was intentionalD was caused by indifferenceE had tragic resultsF made a large profit for the companyText3:Section: 11-4 complete, no more than three words and/or numbers5-7 choose5 Sara requires aA single roomB twin roomC triple room6 She would prefer to live with aA familyB single personC couple7 She would like to live in aA flatB houseC studio apartment8-10 complete, not more than one word8 The will be $3209 She needs to pay the rent by cash or cheque on a basis.10 She needs to pay her part of the bill. Section: 211-14 choose11 When is this year’s festival being held?A 1-13 JanuaryB 5-17 JanuaryC 25-31 January12 What will the reviewer concentrate on today?A theatreB danceC exhibitions13 How many circuses are there in the festival?A oneB twoC several14 Where does Circus Romano perform?A in a theatreB in a tentC in a stadium15-20 complete, no more than three wordsSection: 321-25 choose21 The man wants information on courses forA people going back to collegeB postgraduate studentsC business executives22 The ‘Study for Success’ seminar lasts forA one dayB two daysC three days23 In the seminar the work on writing aims to improveA confidenceB speedC clarity24 Reading sessions help students to readA analyticallyB as fast as possibleC thoroughly25 The seminar tries toA prepare learners physicallyB encourage interest in learningC develop literacy skills26-30 choose26 A key component of the course is learning how toA use time effectivelyB stay healthyC select appropriate materials27 Students who want to do the ‘Study for Success’ seminar shouldA register with the Faculty OfficeB contact their Course ConvenorC reserve a place in advance28 The ‘Learning Skills for University Study’ course takes place onA Monday, Wednesday and FridayB Monday, Tuesday, WednesdayC Monday, Thursday, Friday29 A feature of this course isA a physical training componentB advice on coping with stressC a detailed weekly planner30 The man choose the ‘Study for Success’ seminar becauseA he is over fortyB he wants to start at the beginningC he seeks to revise his skillsSection: 431-32 complete, no more than 2 words and/or a number33-37 complete, no more than three words38 choose two lettersWhich TWO facilities did the students request in the new Union building?A a libraryB a games roomC a student health centreD a mini fitness centreE a large swimming poolF a travel agencyG a lecture theatre39 choose the correct lettersWhich argument was used AGAINST having a drama theatre?A It would be expensive and no students would use it.B It would be a poor use of resources because only a minority would use it.C It could not accommodate large productions of plays.40 choose two lettersWhich TWO security measures have been requested?A closed-circuit TVB show Union Card on entering the buildingC show Union Card when askedD spot searches of bagsE permanent Security Office on siteText4:Section: 11-10complete, no more than three words and/or a number11-15 choose11 To find out how much holidays cost, you should press buttonA oneB twoC three12 Travelite currently offer walking holidaysA only in Western EuropeB all over EuropeC outside Europe13 The walks offered by TraveliteA cater for a range of walking abilitiesB are planned by guides from the local areaC are for people with good fitness levels14 On Travelite holidays, people holidaying alone payA the same as other clientsB only a little more than other clientsC extra only if they stay in a large room15 Entertainment is providedA when guests request itB most nightC every night16-20 complete, no more than 3 words and/or a number27-30 choose one letterExperiment 1: 27Experiment 2: 28Experiment 3: 29Experiment 4: Example FExperiment 5: 30Sharks in Australialargest caught: 16metresheaviest: 31kgcartilagerough barbsfins and 32gathered from the ocean 33Sharks locate food by using their 3435-38 choose35 Shark meshing uses nets laidA along the coastlineB at an angle to the beachC from the beach to the sea36 Other places that have taken up shark meshing includeA South AfricaB New ZealandC Tahiti37 The average number of sharks caught in nets each year isA 15B 150C 1,50038 Most sharks are caught inA springB summerC winter39-40 choose two lettersWhich two factors reduce the benefits of shark nets?A nets wrongly positionedB strong waves and currentsC too many fishD sharks eat holes in netsE moving sandsF nets too shortG holes in nets scare sharks。
Experimental 4-byte ASN
• prop-032-v002: 4-byte AS number policy proposal
• On-demand assignment of 32bit only ASN from Jan 2007 • Default assignment of 32 bit only ASN from Jan 2009
Basic idea
• Defining experimental 32-bit ASNs
– To allow operators to try 32-bit ASN on in the live Internet
• Defining experimental IPv4 address block
Your thought?
• For the idea of experiment itself • Also talking among idr@ • Could be compiled as an Internet-Draft
Thank You !
Four Byte AS Number Experiment MAEMURA Akinori maem@ Japan Network Information Center France Telecom Research & Development Tokyo
• Defining mental 32-bit ASN
– Let’s say 39.[existing ASN] for 16-bit ASN holders – Let’s say 39.[49152—65535] for non ASN holders
• 49152 == 1100 0000 , 65535 == 1111 1111
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Harbin Engineering University Computer Science & Technology
3
附加题
2、采用五种方式遍历下面给定的数组 int array[]={1,4,2,7,13,32,21,48,16,30}; 提示：
1 数组下标array[i]； 2 数组名+加法*(array+i)； 3 指针下标ip[i]; 4 指针加法*(ip+n); 5 指针增量*(ip++)
int a[]={}; int n=sizeof(a)/sizeof(a[0]); vector<int> va(a,a+n);
Harbin Engineering University Computer Science & Technology 5
实验题目
学生信息表Student 课程信息表Course 成绩表Score
实验4
李晋
实验目的
1、动态对象的创建
设计并实现利用new和delete运算符动态创建和 清除对象的程序。
Harbin Engineering University Computer Science & Technology
2
实验题目
1.编写一个程序，该程序建立一个动态数组 ，为动态数组的元素赋值，显示动态数组的 值，并删除动态数组。
7
实验题目
2
8
19
实验6 要求：
4
32
5 20 1 45
1、建立树节点类用于存储 左图的树； 2、动态创建树节点数组； 3、按照广度遍历依次动态 创建树节点并存入数组中；
Harbin Engineering University Computer Science & Technology
8
Harbin Engineering University Computer Science & Technology
6
实验题目
2
8
19
实验5 要求：
4
32
5 20 1 45
1、建立树节点类用于存储 左图的树； 2、动态创建树节点数组； 3、按照深度遍历依次动态 创建树节点并存入数组中；
Harbin Engineering University Computer Science & Technology
Harbin Engineering University Computer Science & Technology
4
附加题
3、定义一个数组，数据为： 6,3,7,1,4,8,2,9,11,5 要求：
1、创建一个向量，把数组的初值赋给它； 2、打印该向量的数据； 3、求向量内数据的和； 4、将向量按照从小到大排序。
学号
20112001 20112002 20112003
姓名
王雪 赵倩 卢萌
课程号 c001
课程名称 数据结构
学号 20112001
课程号 c001
分数 92
c002
c003
操作系统
数据库原理
20112001
20112002 20112003
c002
c003 c002
ቤተ መጻሕፍቲ ባይዱ
89
78 90
实验4 具体要求： 1、分别建立Student，Course，Score三个类表示上述三个表的结构； 2、分别建立Student，Course，Score三种类型的数组，动态创建Student， Course，Score对象分别为每个数组赋值； 3、根据三个表的信息输出学生的成绩，格式如下： 学号 姓名 课程名称 分数 20112001 王雪 数据结构 92 20112001 王雪 操作系统 89 …… 20112003 卢萌 操作系统 90