Step 1 Review 第一步 复习 (检查上节课综合探究活动的成果--描述你心中理想的世界环境.要求学生交换欣赏.并选几名学生进行描述.把优秀作品张贴起来.) T: We have known a lot about the unhappy childhood of Kangkang’s granny. And we also have known the great changes around us. The roads in the past were narrow and dirty. Now there are many clean and wide ring roads in the cities. T: Some students have done excellent work. We should learn from them. We should make our environment cleaner and cleaner. Our house and our world will be more and more beautiful. Thanks to the most people’s protection, the environment has become cleaner and nicer. thanks to- (教师用英语讲解thanks to.) T: Thanks to your hard work, we can live comfortably. Thanks to the government’s efforts, Beijing will host the 2008 Olympic Games. effort (教师讲解effort的意思.) When someone is in trouble, he wants to make some efforts. By the way, my dear, who has been to Beijing in recent years? (复习by the way, recent和has been to.) S1: I have. T: What a lucky boy/girl! T: Have you been to Beijing? S2: Yes, I have. I went there last holiday. T: How is the Beijing city now? S3: I think it has made rapid progress, though I had no enough time to travel everywhere. T: Oh, I remember. My brother has gone there. He will be back in a week. He will buy “Fu Wa for my son. Next, our job is to listen to the tape. (教师尽量用本单元重点句型以利于学生复习.) T: Next, let’s review the present perfect and some useful expressions. Play the tape of 2a and 2b. (让学生听2a和2b的句型.) Now, can you say the sentences as many as you can after the listening? (播放磁带.板书2a中的关键句.) 1. Where have you been? 2.I have been to- 3.Have you-? 4. My uncle has worked in Beijing for more than twenty years. (让学生回顾前面所学的有关内容.鼓励他们说出更多的现在完成时的句子.) T: Go over the present perfect we have learnt recently. (可以两人一组站起来回答.) Example A:S3: Where have you been during the weekend? S4: I’ve been to a library, where have you been? S3: I’ve been to the countryside, my hometown. Example B:S5: Where’s Mary? S6: She has gone to Shanghai. S5: When will she come back? S6: In a week, I think. S5: Have you been to Shanghai? S6: No, I haven’t, but I have been to Nanjing. (学生可以踊跃发言.每人说一句现在完成时的句子.老师也可以创设情景.让学生说句子.) For example: T: Beijing. S7: I haven’t been to Beijing. T: Tianjin. S8: I went there last year. I have been to Tianjin. T: Canada. S9: My uncle has gone to Canada. T: We have said so many sentences. Next, let’s listen to 2b. Please read after it as clearly as you can. (教师出示相关图片.复习2b中的重点句子.) Ss: I feel sorry for them. Ss: There goes the bell. Ss: Their work is to grow cotton. (出示孤儿院图片.有人在照顾孩子.) (学生可能会说出不同的句子.培养学生的发散思维能力.) S10: Though they had/have no parents, they could get care. S11: They are/were happier than the child laborers. T: Is that so? I’m sure all of us are the happiest and we should give them a hand in our spare time. By the way, are you interested in the Olympic Games? Here are five mascots, “Fu Wa . Steps 2 Presentation 第二步 呈现 (用5个可爱的奥运吉祥物-福娃.导出本课所呈现的内容.) T: What are their names? Ss: Beibei, Jinging, Huanhuan, Yingying and Nini. T: You have known a lot. They mean “Welcome to Beijing! . Do you know where the 2008 Olympic Games will be hosted? And what’s the slogan? Please listen to the tape and then answer me. 1. The 2008 Olympic Games will be hosted in . 2. The slogan is . (学生听Section D 1a录音.) T: Who has got the answers? (第一问题很简单.学生很快答出.目的是再现the capital一词.) S1: In Beijing. T: Yes. Beijing, the capital of China. It also has expressed the wishes of 1.3 billion Chinese people. What’s the slogan? S2: Sorry, I don’t know. S3: One World, One Dream. T: Yes. The slogan is One World, One Dream. One World, One Dream T: Next, open your books. Please read the text carefully. T: What do the mascots stand for? S4: They stand for the Olympic rings. S5: They mean “Welcome to Beijing . S6: “Bei, Jing, Huan, Ying, Ni . T: Beijing, the capital of China, will host the 2008 Olympic Games. What are you planning to do for it? Step 3 Consolidation 第三步 巩固 (小组进行讨论.表达自己计划为奥运做何准备.) T: We all wish for a better world tomorrow. The 2008 Olympic Games can express the rich culture of China as well. As a high school student, what are you planning to do for it? Discuss your plan with your partners. Express your opinions. (学生分组讨论.完成1b内容.) (每组完成一个计划总结.进行汇报.) For example: G1: 1.Learn English harder than before.2. Teach parents and grandparents to speak English. G2: 1.To be volunteers of Beijing in 2008. 查看更多

 

题目列表(包括答案和解析)

(10分)植物具有向重力生长的特性,下列是研究根向重力生长机理的两个实验。
实验一:将空白琼脂和含EDTA的琼脂做成帽状,分别套在甲、乙两组玉米胚根的根冠外(示意图如下)。提示:EDTA的作用是去除与其临接部位的 Ca2+

将胚根水平放置培养一定时间后,观察到甲组胚根向重力(下)生长,乙组胚根水平生长。根据上述实验结果,得出实验结论:                               
  实验二:水平放置的胚根弯曲向下生长,与根冠近地侧的Ca2+浓度明显高于远地侧有关。研究表明,根总是朝着Ca 2+浓度高的方向弯曲生长。为验证这一结论,有人设计了下列实验方案。请根据提供的实验材料和用具,写出第二步及以后的实验步骤和实验结果,并回答问题。
(1)实验材料和用具:胚根等长的萌发玉米种子,空白琼脂帽,含EDTA的琼脂帽,上面部分含Ca2+的琼脂帽(水平方向),培养皿等。
(2)实验步骤:
  第一步:取若干个培养皿,在每个培养皿中放置适量的萌发玉米种子,按实验一中乙组的方法处理胚根一定时间后,移去根冠外的琼脂帽。然后将培养皿平均分成两组,编号为 A组、B 组。 
  第二步:                                                            
  第三步:                                                            
(3)实验结果:                                                         
(4)科学家进一步证实,根冠中生长素的分布受Ca2+浓度影响,当胚根水平放置时,重力诱导Ca2+向根冠下侧移动,导致近地侧的生长素浓度比远地侧高。请分析胚根的生长素分布与向重力生长的关系:                                  

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如图甲表示某生物膜结构,图中A、B、C、D、E、F表示某些物质,a、b、c、d表示物质跨膜运输方式。图乙和图丙表示物质运输曲线,请据图回答:


(1)若图甲是癌细胞的细胞膜,则膜上含量较正常细胞减少的物质是[  ]    
(2)若图甲是线粒体膜,b和c过程运输的气体分别是    。b、c运输方式符合图    所表示的物质运输曲线。
(3)若图甲表示人体红细胞膜,则表示Na、K运输的分别是图中      。Na、K的运输方式符合图    所示曲线。
(4)已知红细胞吸收葡萄糖是协助扩散,而有人认为小肠上皮细胞以主动运输的方式吸收葡萄糖,请设计实验加以确定。
①实验步骤:
第一步:取甲、乙两组生理状况相同的小肠上皮细胞,放入适宜浓度的含有葡萄糖的培养液中。
第二步:甲组细胞给予正常的呼吸条件,         
第三步:                
②预测实验结果并分析:
a.若甲、乙两组细胞对葡萄糖的吸收速率基本相同,则         
b.                                

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阅读下面文章,完成小题。(13分)
用善良做底色
松 韵
天气冷得出奇,寒风咆哮着卷起雪花,升腾起呛人的白烟。
温暖的红砖房里,母亲在厨房里忙碌着,柴火在灶坑里噼啪作响,锅上冒着润白的蒸气。我和弟弟早就饿了,正眼巴巴地等待着第一锅酸菜肉蒸饺出笼。
这时,有人叫门。父亲出去片刻,带回一个衣着单薄的外乡人来。看上去是个20多岁的农民,但是很年轻,嘴唇都发青了,显然在风雪中冻了很久。
“这丝棉很好的,你看看。”他说着,卸下肩上的旧麻袋,就要往外掏丝棉。
“别拿了,我不买丝棉。”父亲止住了他,“外面太冷,请你进屋暖和暖和!”“哦,不买?不买啊?这丝棉好,真的很好。”他有些失望,坐在暖和的火墙旁,一时却也并不想挪动。
这时,母亲端上了两大盘热腾腾的酸菜肉蒸饺。“你一定饿了,吃几个饺子挡挡寒吧!”母亲看着仍有些哆嗦的他,把筷子递过去。  
那人的确是饿了,推辞了一下,便接过筷子狼吞虎咽起来。当他意识到我们一家人还没吃饭时,两盘蒸饺只剩下了小半盘。他尴尬地抬起来,窘迫不安地嗫嚅道:“这……我……我……你们,你们还没吃吧?”
母亲笑道:“还有呢,你要吃饱了啊!”
蒸饺的确还有,可那一笼是纯素馅儿的,一丁点儿肉都没放。
弟弟捏了捏我的衣角,嘟起嘴来。
一盘半的蒸饺,对他来说可能也就六分饱,但无论如何他也不肯再吃了。
接下来的聊天中,我们知道他是安徽的农民,跟父亲弟弟一起到北方贩丝棉,没想到折了本,近年关了,打算把剩下的丝棉低价处理了,好歹挣回返乡的路费。  “我兄弟的脚冻坏了,他跟我父亲在车站蹲着呢。今儿天太冷,没让他们出来,我寻思把最后一包丝棉卖了,今晚就跟他们坐火车回去。”他说。
母亲听了,感叹道:“唉,你们做点小生意,也挺不容易啊!”
父亲跟母亲轻声说了点什么,母亲便去仓房找了三双半新的棉鞋,还有半面袋的冻豆包回来,递给这个年轻人说:“我们也不是有钱人家,要不然,就把你这丝棉买下了。这双棉鞋你换上,另两双拿去给你父亲和弟弟穿,北方不比南方,脚冻伤了可了不得!冻豆包我们今年蒸得多,你带几个让你的父亲和弟弟尝尝吧!”
年轻人站了起来,拘谨地搓着手,一遍遍地说:“这可咋好呢?这可咋好呢?我这是遇上好人家了!”  
我们把他送出门时,年轻人一眼瞥见院子里一堆锯好的圆木。他突然放下肩上的包,三步两步抢过去,“我干点儿活再走!”说着便抡起大斧,劈起柴来。母亲正要劝阻,父亲说: “让他干吧!”
寒风中,雪花飘飞,年轻人已经走了,我家院子里,整整齐齐地码着一垛劈得粗细均匀的柴火。
弟弟吃了剩下的半盘有肉的蒸饺,玩去了。我跟父母吃着第二笼纯素馅儿的蒸饺,觉得温暖而香甜。
我一直认为,在这个世界上,最赏心悦目的,是纤尘未染的青山绿水;最温暖人心的,是人与人之间纯洁真挚的感情。 暮年回首时,最有价值的财富,应是一颗恬淡宁静的心,和一份丰富无悔的回忆。而所有这一切的拥有,都需要用一颗善良单纯的心做底色。
【小题1】文章开头第一段的环境描写有何作用?(3分)
【小题2】“我”和父母吃着纯素馅蒸饺时,为什么会觉得“温暖而香甜”?(3分)
【小题3】年轻人在作出为“我”家劈柴的决定时,心理活动是怎样的?请联系上下文,
用文字写出来。(2分)
【小题4】年轻人在为“我”家劈柴时,母亲要阻止,而父亲却说“让他干吧”, 父亲这样做
的原因是什么呢?(2分)
【小题5】读下面的材料,然后结合本文,说说你的感受。(3分)
联合国秘书长安南卸任后,在得克萨斯州的一个庄园里举行了一场慈善晚宴,旨在为非洲贫困儿童募捐,应邀参加晚宴的都是富商和社会名流。当天慈善晚宴的主角不是倡议者的安南,不是捐出300万美元的巴菲特,而是仅仅捐出30美元零25美分的小露西。她说了这样一句话:“慈善的不是钱,是心。”让全场的人感动不已。

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阅读短文,在其后空白处写出各单词的正确形式。单词的第一个字母已经给出。

    The worst traveler in the world was Paul of San Francisco. Once he f____1. from the U.S. to his hometown in Italy to see someone at home. The plane made a one-hour stop to get oil at an airport in New York. Paul thought he was in Rome. C____2., he got off the plane.

    When nobody was there to meet him, Paul thought maybe the heavy t____3. made his friends late. While looking for their address, Paul found that the old “Rome”had changed a lot. He found many high m____4. buildings instead of old ones. He also found that many people spoke English but not Italian and that many street signs were w____ 5. in English.

    Paul knew very l____6. English. So he asked a policeman in Italian the way to the bus station. He happened to meet a policeman who was also born in Italy and answered in the same l____7..

    After twelve hours’ traveling round on a bus, the driver handed him over to a____8. policeman. But this time, this policeman could only speak English. So paul asked the policeman why the Rome police employed(雇佣)so many people who spoke English as policemen.

    Paul didn’t b____9. he was in New York when he was told so. To get him on a plane to Italy, he was s____10. to the airport in a police car.

 

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根据情景补全对话?

A;1     you 2     to 3     to the cinema??

B: That's a great 4    !5     go 6     Lingling.7     is it??

A: It's 8     the afternoon and 9     the evening.?

B: 10      go in the evening.11      you 12      to 13      to a football 14     on Sunday? It's Manchester United, my 15     team.?

A: That's a good 16    .

 

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