1、Laboratory Safety RulesScience is a handson(实际操作的) laboratory class.You will be doing many lab activities which may need the use of chemicals or equipment.To make sure of a safe science classroom，we provide you with a list of rules.These rules must be followed at all times.GENERAL GUIDELINES(准则 )1Ne
2、ver work alone.No student may work in the lab without a teacher present.2When first entering a lab，do not touch any equipment， chemicals，or other materials in the lab until you are asked to do so.3Do not eat， drink，or chew gum in the lab.Do not use lab glassware as containers for food or drink.4Know
3、 the positions and operating procedures(程序) of all safety equipment，including the firstaid kit and the fire extinguisher(灭火器) Know where the fire alarms and the exits are.5Check the labels(标签) on chemical bottles twice before removing any of the chemicals.Take only as many chemicals as you need.6Mos
4、t chemicals in the lab are considered to be dangerous.Do not touch，taste，or smell any chemicals unless specifically asked to do so.7At the end of your experiment，clean everything carefully and return your equipment to where you got it.Wash your hands with soap and water after performing all experime
5、nts.WHAT TO WEAR1Dress properly during a lab activity.Long hair must be tied back and shoes must completely cover the feet.2Contact lenses should not be worn in the lab unless you are allowed by your teacher.3Any time chemicals，heat，or glassware is used，students will wear lab goggles(护目镜)Nobody shou
6、ld break this rule!ACCIDENTS AND INJURIES1Report any accident or injury to the teacher immediately.2If a chemical should get into your eye(s) or onto your skin，go to see a school nurse immediately.根据上文判断正(T)误(F)1Students can work in the lab by themselves if a teacher isnt present.( F )2You can drink
7、 when thirsty，but you cant eat when hungry in the lab.( F )3You must never wear contact lenses in the lab.( F )Period One Introduction & Reading and VocabularyPrereading匹配左边的单词与右边的汉语意思第一组1liquid A膨胀2expand B混合物3contract C液体4substance D收缩5mixture E物质答案 1.C 2.A 3.D 4.E 5.B第二组6electricity A结论7stage B目标
8、；目的8conclusion C反应9aim D电10reaction E阶段；时期答案 6.D 7.E 8.A 9.B 10.C第三组11electrical A(化学) 反应12equipment B生锈13react C设备；装备14partial D部分的；局部的15rust E与电有关的；用电的答案 11.E 12.C 13.A 14.D 15.B第四组16boil A溶解；分解；分离17ordinary B形成18float C漂浮19form D煮；煮沸20dissolve E普通的；平常的答案 16.D 17.E 18.C 19.B 20.AStep 1 Fastreading
9、1Read Passage A and choose the best title for it.AThe Different Uses of MetalsBThe Reaction of MetalsCThe Reaction of Metals with Oxygen答案 B2What should be included in a description of an experiment according to Passage B?(1) (2) (3) (4) (5) 答案 (1)Aim (2)Apparatus (3)Method (4)Result (5)ConclusionSt
10、ep 2 Carefulreading.Choose the best answer according to Passage A.1Which of the following metals reacts the most with water?ACopper. BIron.CAluminium. DSodium.答案 D2When heated in oxygen ， will react partially.Azinc BcopperCpotassium Dall metals答案 B3According to the passage，it can be inferred that wi
11、ll have less use in making kitchen tools.Aaluminium BironCsteel Dcopper答案 A.Choose the best answer according to Passage B.1The experiment shows us .Ahow iron reacts with airBiron is quite easy to rustChow to prevent iron from rustingDhow iron reacts with air and with water答案 D2 “Airfree water” means
12、 .Aair with a lot of waterBair without waterCwater with a lot of airDwater without air答案 D3If some clean iron nails are put in a damp place for a week，the nails will .ArustBnot rustCform an oxideDkeep the place dry答案 AStep 3 PostreadingAfter reading the text，please fill in the following blanks.Diffe
13、rent metals have different uses.When we use metals，it is important 1.to know(know) how they react with different substances.The 2.reaction(react) of metals with these substances can 3.be put(put) in order.From the table，we can find that potassium reacts most with oxygen and water 4.while copper does
14、nt react with water.When we heat calcium in oxygen，it burns 5.to form(form) an oxide.In the second part of the experiment，you must boil the water 6.to make(make) sure there is no air in it.You add some oil to the water 7.because this keeps air out of it.It also shows that iron doesnt rust in water 8
15、.without air in it.9.However，the nails rust in the tube with ordinary water in the third part of the experiment.That is 10.how iron reacts with airfree water and with ordinary water.Step 4 Sentencelearning1Different metals have different uses，for example，steel is used in cars，and iron is used in ele
16、ctrical equipment.句式分析 本句的主干为：Different metals have different uses。for example 作插入语，其后的句子对主句的内容进行举例说明，是由并列连词 and 连接的两个分句。自主翻译 不同的金属有不同的用途，比如，钢材被用于汽车中，铁被用于电气设备中。2When we use metals，it is important to know how they react with different substances，for example，water and oxygen.句式分析 本句为复合句。when 引导的是时间状语从
17、句；it 为形式主语，不定式 to know.为真正的主语；know 后面是 how 引导的宾语从句。自主翻译 当我们使用金属时，了解金属和不同的物质 (例如水和氧气) 如何发生反应很重要。3Here is a table with the metals that react most at the top， and the metals that react least at the bottom.句式分析完 全 倒 装 句句子主干： Here is a tablewith 短语作定语修饰 table with the metals and the metals that 定语从句修饰 me
18、tals.that react most at the topthat react least at the bottom自主翻译 这里有一张表格，反应最强烈的金属在上面，反应最弱的在下面。.阅读理解AMore and more birds are flying to settle at Qinghai Lake，one of the highest inland lakes in China， thanks to the protection efforts of local governments.Covering an area of over 4,000 square kilomete
19、rs，Qinghai Lake is also the countrys biggest saltwater lake.Located in Northwest Chinas Qinghai Province，the lake is famous for the two islands at its northwest pointCormorant Island and Egg Island.The two islands have plenty of floating grass and various schools of fish，offering rich food sources f
20、or birds.The islands have become a paradise for different kinds of groups of birds and have been called “Bird Islands”Each March and April，when ice and snow covering the QinghaiTibet Plateau starts to melt，over 20 kinds of birds fly to the Bird Islands to lay eggs.During the months，flocks of birds c
21、over the whole sky over the islands and birds eggs can be found everywhere.Visitors can hear the singing of birds from miles away.These have become a worldfamous symbol of the lake.To protect this paradise for birds and support calls for ecological protection，China set up the Qinghai Lake Natural Pr
22、otection Zone at the end of 1997.Meanwhile，the State has pointed out the Bird Islands and Spring bay of the Qinghai Lake as central protection zones.Inspection officials and management employees often patrol the lake，improving local residents knowledge of related laws and spreading knowledge about a
23、nimal protection to visitors.They are making great efforts to call on people to love and protect the birds.At the same time，they have built special fences around the island area to prevent wolves，foxes and other carnivorous animals，as well as illegal hunters from breaking up the birds nestbuilding，
24、egglaying and breeding.As a result，more and more birds are coming to the islands for sheltering and breeding.语篇解读 本文是一篇说明文。主要介绍了由于青海湖得天独厚的自然环境以及政府对鸟类的保护措施，越来越多的鸟类在此栖息，使之成为鸟的天堂。1Why are more and more birds coming to the biggest saltwater lake in the Great Northwest?ABecause it is getting warmer and w
25、armer.BBecause it is being reformed.CBecause environments there are getting more and more agreeable for them to live in.DBecause the people there are becoming richer and richer.答案 C解析 推理判断题。根据文章的第一段可知青海湖的两座岛屿为鸟类提供了丰富的食物来源，越来越多的鸟儿迁徙到青海湖，故可推知那里的环境适宜鸟儿生活，故选 C。2The birds feed on according to the passage
26、.Afloating fish and various grassBgrass moving on the water surface and different kinds of fishCsalt water and plenty of grainsDcorn from the local farmers答案 B解析 细节理解题。根据文章第一段中的“plenty of floating grass and various schools of fish，offering rich food sources for birds”可知，鸟儿是以水草和鱼儿为食的，故选 B。3Which of t
27、he following statements is TRUE according to the passage?AThe ice and snow covering the QinghaiTibet Plateau doesnt change into water，unless more than 20 kinds of birds come to the Bird Islands.BFlocks of birds fly up to the whole sky over the islands to lay eggs.CVisitors can listen to the singing
28、of birds from miles away，but they couldnt see any bird.D “The ice on the Plateau begins to change into water” means spring is coming.答案 D解析 推理判断题。根据文章第二段中的“Each March and April，when ice and snow covering the QinghaiTibet Plateau starts to melt”可知每年的三四月份，雪融化了，春天来了，故 D 项是正确的。4The officials go around t
29、he lake mainly to .Alet the farmers there know the animal protection lawBtell the farmers there some knowledge about animal protectionCcall on people to love and protect the birdsDall of the above答案 D解析 细节理解题。根据文章的第四段可知政府官员给人们普及动物保护法，而且告诉人们保护动物的重要性，并呼吁人们爱护鸟儿，A 、B、C 三项均正确，故选 D。BIf you want to become
30、a fluent English speaker you should take some advice.There are four skills in learning English.They are reading，listening，speaking and writing.The most important thing you must remember is that if you want to improve your speaking and writing skills you should first master the skills of reading and
31、listening.Read as much as you can.But your reading must be active.It means that you must think about the meaning of the sentence，the meaning of the unfamiliar words，etc.There is no need for you to pay much attention to grammars or try to understand all the unfamiliar words you come across， but the f
32、act that you see them for the first time and recognize them whenever you see them，for example in other passages or books，is enough.It would be better to prepare yourself a notebook so you can write down the important words or sentences in it.As for listening，there are two choices：besides reading，you
33、 can listen every day for about 30 minutes.You can only pay attention to your reading and become skillful at your reading，then you can catch up on your listening.Since you have lots of inputs in your mind，you can easily guess what the speaker is going to say.This never means that you should not prac
34、tice listening.For listening you can listen to cartoons or some movies that are specially made for children.Their languages are easy.Or if you are good at listening you can listen to VOA or BBC programs every day.Again the thing to remember is being active in listening and preferably taking some not
35、es.If you follow these pieces of advice，your speaking and writing will improve automatically， and you can be sure that with a little effort they will become perfect.语篇解读 如果你想学好英语，应该掌握其四种技能：听、说、读、写。读与听是学好英语的关键。5According to the author，which should you improve first among the four skills?AReading and
36、listening.BReading and writing.CWriting and speaking.DSpeaking and listening.答案 A解析 细节理解题。根据第一段最后一句可知，作者认为要想提高说和写的能力，首先要掌握读和听的技能。6To improve your reading，when you read you should .Alook up all the new words in the dictionaryBthink about what you are reading activelyCspend more time studying grammars
37、Dcopy as many words and sentences as possible答案 B解析 细节理解题。根据第二段第二、三句可知，在阅读的过程中要积极思考。7The underlined phrase “come across” in Paragraph 2 can probably be replaced by “ ”Ameet by accident BdiscoverCfind on purpose Dlook for答案 A解析 词义猜测题。此处是告诉读者没有必要去理解遇到的所有的不熟悉的单词，由此推知 come across 指“偶然遇到” 。8The author se
38、ems to agree with the view that .Aeveryone should listen to VOA or BBC programs every dayByou needn t practice listening if you keep on reading every dayCbeing good at reading is helpful in improving your listeningDyou should take notes of whatever you are hearing答案 C解析 推理判断题。由第三段第二句可知，作者认为多阅读有助于提高听
39、力。CAs I was walking home，a boy seemed to be singing a song in a very low voice，walking in front of me and carrying some of the same high school books I had with me.I caught up to him，and said “Hello”I could tell he was startled，and dropped one of his books.I picked it up and as I handed it to him，he
40、 said “Thank you.” in a strange way，like with a strong accent.We soon began walking together and talking.It turned out he was in my science class，and I didnt even know it!His name was Ahmad，and his family had just moved here this school year.He invited me into his house，and his family treated me lik
41、e a special guest，which made me feel very welcome.He said hospitality (好客) was very basic to his culture，and strangers were always treated very kindly.His mom brought out some great food，and offered me some tea.Ahmads father and two sisters wanted to hear all about me and my family，and my schooling.
42、Ahmads whole family had to leave their lifelong home because war had broken out，and it wasnt safe there anymore.They left with only what they could carry.His family was happy to feel safe，and they got used to American culture quickly.They seemed pleased that Ahmad had brought a friend home to meet t
43、hem.And as my friendship with Ahmad has continued，I now realize that the world is so much bigger than I thought! I also realize that your friends dont have to be just like you.Differences make the world go round.语篇解读 在回家的路上，作者偶遇了一个来自另外一个国家的男孩，尽管他们之间有着很大的文化差异，他们还是成为了很好的朋友。9What does the underlined wo
44、rd “startled” in Paragraph 1 mean?AExcited. BMoved.CSurprised. DInterested.答案 C解析 词义猜测题。根据画线词后的“and dropped one of his books”及“in a strange way，like with a strong accent”可知，这个男孩不认识作者，对作者的突然问候感到吃惊，以至于掉了一本书。故选 C 项。10Why was the writer treated like a special guest by Ahmads family?AThey liked strangers
45、 who came to their home for help.BThey wanted to know more information about the writer.CStrangers were always treated very kindly in their culture.DThe writer was an American and knew much about their culture.答案 C解析 细节理解题。根据第三段第三句可知，在艾哈迈德他们的文化中，殷勤好客是一种基本的礼节，他们总是善待陌生人。故选 C 项。11Where does the writer
46、probably come from?ACanada. BAmerica.CChina. DAustralia.答案 B解析 推理判断题。根据第四段第三句中的“and they got used to American culture quickly”可知，这家人很快适应了美国文化，由此可以推断出作者可能是来自美国。故选 B 项。12What can we learn from the passage?APeople from different countries can be good friends.BFriends need different cultures and differe
47、nt accents.CYour friends should have a lot of things the same with you.DYou cant make friends with people from other countries.答案 A解析 推理判断题。通读全文可知，作者与来自另外一个国家的男孩艾哈迈德在路上偶遇，尽管他们之间有着很大的文化差异，但最终他们成了很好的朋友。由此可以推断 A 项正确。.七选五Most people think that good looks and being smart will give you advantage in life.T
48、he first is Godgiven. 13 In this article we explore some different ways to become smarter.Go to college， and get an education. 14 It means that you will have been exposed to many different ideas and hopefully you will have learned how to think.Being able to think outside the box and for yourself is a feature smart people possess.Read books and educational magazines. 15 Educational magazi