目标在学生学习过程中的作用至关重要.教师要帮助他们建立起一个切合自己实际的目标.通过渐进的学习以及一点一滴的进步.使他们逐步建立起成功感.成功越多.自信心就越强. 学情分析 代词this.it的用法. this指处于说话者近处的单数事物.it指代上文出现的单数的事物.也可指代上文出现的this.例如: A:What’s this? 这是什么? B:It’s a pen.这是支钢笔.教学准备 Tape-recorder.multi-medium 课时参考 五课时 Period 1(from Section 1a to 1c) Step l:Introduction Review greetings. Review the letters learn in the last unit. Get the students to introduce themselves in English.h Step 2:Lead-in Have ready a quilt.a map.a jacket.a key.a ruler.a pen.an orange.Hold the key up and say What’s this in English? It’s a key. Repeat and then get students to repeat.Do the same with a key.a pen.a ruler. use flashcards to teach the spelling of the words.Put a flashcard beneath a drawing of each object. Step 3:listen Play the tape twice.For the first time, the students only listen. For the second time, the students repeat the conversations. Step 4:pairwork Say the sample conversations. Have students repeat. Then students practice the conversations in pairs. Finally ask students to practice asking each other items they know. Have the students circle the things they hear. Get the students to act out the conversations in the picture of 1a. Make sure the students understand what they should do.Students can work in pairs then ask them to act out the conversations they made. Step5:Games time Play the letter game with the students like the following instructions.Sometimes the teacher can explain the rules of the game in Chinese. 看谁快 这是一个训练学生听字母的游戏.将全班分成两组.一组学生持大写字母.另一生持小写字母.教师快速念字母.要求持有该字母的学生迅速站起来.最先站起来的两分.后站起来的得一分.没站起来的得零分.得分多的组获胜. Step 5:Homework Practice the drill after class. Period 2 Step 1:Lead-in Write the names in the big letters on the blackboard.teach the students to read the names.Then get them to listen to the tape and number the names.Have the students pay attention to your writing names on the Bb.Make sure everyone knows how to write the names. Step 2:Listen Do 2a.2b.2c and 2d one after another.2b:after the students do 2a, show them how to write the letters on the blackboards.both of “Big and “small.Make sure all the students know how to write them. Use the flashcards to practise saying the names of the letters and to learn their order.Before doing 2c.ask the students to give the letters containing the/i:/and /e/ sounds.Repeat /sounds.List them out on the blackboard.Then get them listen to the tape and read the letters and words after the tape. Step 3:Pairwork Ask the students to say out where we can find English words or English names around us and what they are.What’s the meaning of it? Maybe the students can list a 1ot.If they couldn’t.give them some notes such as WC, NBA.Exit ,Kg and so on. Let the students try their best to search as many abbreviations as possible. step 4:Practice And get them to introduce themselves to the others with their new English name.All these must do after the students know how to do it.The teacher can give them an example with the help of one student.The teacher can take the dialogue on the book for an example.Practise: A:Hello! B:Hello! A:I’m Paula.P-A-U-L-A.Paula.What’s your name? B:I’m James.J-A-M-E-S.James. A:How do you do? B:How do you do? A:Nice t0 meet you. B:Nice to meet you.too. Have students switch roles and repeat. step 5:Homework Copy the new words and Finish off the exercises in the exercises book. Period 3 Step 1:Lead-in Have ready a map.an orange.a ruler.a pen.a key, a quilt.Use these to ask students:What’s this in English? Get them to answer the question one by one.Then ask them to listen and number the words they hear. After they finish 1a.make sure they read the words correctly.And ask students to write the words down in small letters. Step 2:Complete Play the recording again. Ask students to fill in the missing letters for all the vocabulary here. Then check the answers. Step 3:Pairwork Do the contents list on the book.Then play a guess game.The teacher should get ready a soft bag.and some objects such as a ruler.a pen.a key.an orange and so on.First show all the things to students.then hide all of them in the teacher’s desk.put one into the bag.try not to let students see it.At last get students to guess what’s in your bag.The teacher can ask the student: T:What’s this in English? A:Is it a book? T:N0.it isn’t. A:Is it a pen? T:Yes.it is. If the student Succeed.congratulate to him or her.Then do the same to another one. This game can also be played in small groups if you have enough materials. Step 4:Homework Finish off the exercises in the exercises book. Period 4(SectionB from 1a to 2b) Step 1:Focus attention on the words. Then play the recording the first time. Students only listen. Point out the lines where students will write numbers. Next play the recording again. This time, students listen and write the numbers on the lines according to the order in which they hear them in the conversation. At last, listen and check the answers. Step 2: Focus attention on the picture. Ask students to say what they can see. Then get students to write the names of the things they can see in the picture on the lines provided. At last, check the answers. Step3:Call attention to the picture. Read the dialogue and ask students to repeat. Then students practice the conversations in pairs, talking about the items in Activity 2a.As students practice, move around the classroom to check progress and help with pronunciation as needed. Period 5(Section B from 3a to Selfcheck) Step 1:Draw attention to the picture. Then explain that they will listen to a recording of letters being read out. Students must circle only the letters they hear. Next play the recording. Students follow the recording to circle the letters they hear. At last, check the answers. Step 2:Focus attention on the incomplete alphabet. Explain that there are letters missing that they should fill in. Then ask students to complete both alphabets with the missing letters until “r . At last, check the answers. Step 3:Focus attention on the chart. Then repeat for the new rows. Next play the recording. Have students repeat all words and letters. Check pronunciation and correct if necessary. Step 4:Selfcheck Part1.Ask students to check all the letters and words they know. Then ask students to find out the meanings of any words they don’t know. Step5:Selfcheck Part2. Ask students to write five new words. Then after students have recorded their new words, ask them to share their lists with other students. 查看更多

 

题目列表(包括答案和解析)

】阅读《塑料瓶装水真的干净吗》完成下面题目(7分)
①出门在外,口渴的时候我们都习惯买一瓶水喝,瓶装水给我们的印象是干净和方便,尤其是高档瓶装水都会标榜自己“出身清白”,“从未受到过人类污染”。例如,“王岛云雨”产自澳大利亚塔斯马尼亚岛,那里号称拥有世界上“最干净的空气”,雨水自然清洁无比;“公元前1万年”产自号称“地球上最古老的水源”——加拿大卑诗省沿岸的冰川,水质更是纯正无比。然而,科学家指出,塑料瓶装水也有可能“不干净”。
②英国化学研究人员威廉·肖迪克表示,装饮用水的塑料瓶生产过程就有污染隐患,因为在制造瓶子的过程中,会使用含有锑元素的化合物作催化剂,随着塑料瓶的成型,锑元素也进入了塑料中。塑料瓶可能会持续向瓶中的水溶解重金属元素锑,这种元素长期积聚在体内可能危害健康。威廉·肖迪克对当地的15种热销瓶装水进行化学检验,结果发现天然地下水中的锑含量是万亿分之一,而刚出厂的瓶装水的锑含量平均为万亿分之一百六十。时间越长,塑料瓶中的锑元素在水中的溶解量越大,这个过程就像泡茶一样。出厂3个月后,瓶装水中的锑元素的含量竟然增加了一倍。然而,现在市场上大多数瓶装水包装上注明的保质期大多是24个月。另外,温度越高,锑元素在水中的溶解量越大,而人们对瓶装水需求量较大的季节是温度高的夏天。肖迪克表示,虽然摄入极少量的锑元素不会导致人生病,但是大量摄入则会诱发呕吐,甚至可能致命。
③美国哈佛大学的研究人员米歇尔等人发现,不少塑料瓶在加工过程中会加入名为“双酚A”(BPA)的化学物质。这种化学物质与出生缺陷、发育问题、心脏病和糖尿病患病风险高有关联。专家对它可能对人体健康造成的影响表示担忧,而一些国家已将该物质正式列为有毒物质。
④此外,荷兰研究者发现,瓶装矿泉水经常被细菌和真菌污染,污染的瓶装矿泉水对健康个体致病的危险可能有限,但对于免疫功能低下的病人和婴儿,则有更高的感染危险。
⑤英国“水与环境管理协会”的执行主席尼克·里夫斯还表示,瓶装水对环境的污染也不容忽视。全世界每年用于制造塑料瓶的塑料为270万吨,这些塑料的原料大多是从石油中提取的,仅在美国,制造这些塑料瓶就要消耗150万桶石油,这些石油可以供10万辆汽车使用一年。86%的塑料水瓶最后都变成了垃圾,需要400年至1000年才能降解。这些塑料垃圾在燃烧时会产生有毒气体和含有重金属的灰烬。
(摘自2011年5月《知识就是力量》,略有删改)
A.随着温度增高,时间增加,塑料瓶中的锑元素在水中溶解量会越大。
B.重金属元素锑一旦被人体摄入,就会诱发呕吐,甚至可能致命。
C.全世界每年用于制造塑料瓶的塑料为270万吨,这些塑料的原料大多是从石油中提取的。
D.专家认为,在塑料瓶加工过程中所加入的名为“双酚A”(BPA)的化学物质可能对人体健康造成影响。
【小题1】下列句中划线词语能否删去?为什么(4分)
(1)出厂3个月后,瓶装水中的锑元素的含量竟然增加了一倍。
(2)瓶装矿泉水经常被细菌和真菌污染,污染的瓶装矿泉水对健康个体致病的危险可能有限,

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