本節(jié)課選自《2019人教A版高中數(shù)學(xué)選擇性必修第一冊(cè)》第二章《直線(xiàn)和圓的方程》,本節(jié)課主要學(xué)習(xí)拋物線(xiàn)及其標(biāo)準(zhǔn)方程在經(jīng)歷了橢圓和雙曲線(xiàn)的學(xué)習(xí)后再學(xué)習(xí)拋物線(xiàn),是在學(xué)生原有認(rèn)知的基礎(chǔ)上從幾何與代數(shù)兩 個(gè)角度去認(rèn)識(shí)拋物線(xiàn).教材在拋物線(xiàn)的定義這個(gè)內(nèi)容的安排上是:先從直觀上認(rèn)識(shí)拋物線(xiàn),再?gòu)漠?huà)法中提煉出拋物線(xiàn)的幾何特征,由此抽象概括出拋物線(xiàn)的定義,最后是拋物線(xiàn)定義的簡(jiǎn)單應(yīng)用.這樣的安排不僅體現(xiàn)出《課程標(biāo)準(zhǔn)》中要求通過(guò)豐富的實(shí)例展開(kāi)教學(xué)的理念,而且符合學(xué)生從具體到抽象的認(rèn)知規(guī)律,有利于學(xué)生對(duì)概念的學(xué)習(xí)和理解.坐標(biāo)法的教學(xué)貫穿了整個(gè)“圓錐曲線(xiàn)方程”一章,是學(xué)生應(yīng)重點(diǎn)掌握的基本數(shù)學(xué)方法 運(yùn)動(dòng)變化和對(duì)立統(tǒng)一的思想觀點(diǎn)在這節(jié)知識(shí)中得到了突出體現(xiàn),我們必須充分利用好這部分教材進(jìn)行教學(xué)
∵在△EFP中,|EF|=2c,EF上的高為點(diǎn)P的縱坐標(biāo),∴S△EFP=4/3c2=12,∴c=3,即P點(diǎn)坐標(biāo)為(5,4).由兩點(diǎn)間的距離公式|PE|=√("(" 5+3")" ^2+4^2 )=4√5,|PF|=√("(" 5"-" 3")" ^2+4^2 )=2√5,∴a=√5.又b2=c2-a2=4,故所求雙曲線(xiàn)的方程為x^2/5-y^2/4=1.5.求適合下列條件的雙曲線(xiàn)的標(biāo)準(zhǔn)方程.(1)兩個(gè)焦點(diǎn)的坐標(biāo)分別是(-5,0),(5,0),雙曲線(xiàn)上的點(diǎn)與兩焦點(diǎn)的距離之差的絕對(duì)值等于8;(2)以橢圓x^2/8+y^2/5=1長(zhǎng)軸的端點(diǎn)為焦點(diǎn),且經(jīng)過(guò)點(diǎn)(3,√10);(3)a=b,經(jīng)過(guò)點(diǎn)(3,-1).解:(1)由雙曲線(xiàn)的定義知,2a=8,所以a=4,又知焦點(diǎn)在x軸上,且c=5,所以b2=c2-a2=25-16=9,所以雙曲線(xiàn)的標(biāo)準(zhǔn)方程為x^2/16-y^2/9=1.(2)由題意得,雙曲線(xiàn)的焦點(diǎn)在x軸上,且c=2√2.設(shè)雙曲線(xiàn)的標(biāo)準(zhǔn)方程為x^2/a^2 -y^2/b^2 =1(a>0,b>0),則有a2+b2=c2=8,9/a^2 -10/b^2 =1,解得a2=3,b2=5.故所求雙曲線(xiàn)的標(biāo)準(zhǔn)方程為x^2/3-y^2/5=1.(3)當(dāng)焦點(diǎn)在x軸上時(shí),可設(shè)雙曲線(xiàn)方程為x2-y2=a2,將點(diǎn)(3,-1)代入,得32-(-1)2=a2,所以a2=b2=8.因此,所求的雙曲線(xiàn)的標(biāo)準(zhǔn)方程為x^2/8-y^2/8=1.當(dāng)焦點(diǎn)在y軸上時(shí),可設(shè)雙曲線(xiàn)方程為y2-x2=a2,將點(diǎn)(3,-1)代入,得(-1)2-32=a2,a2=-8,不可能,所以焦點(diǎn)不可能在y軸上.綜上,所求雙曲線(xiàn)的標(biāo)準(zhǔn)方程為x^2/8-y^2/8=1.
1.判斷 (1)橢圓x^2/a^2 +y^2/b^2 =1(a>b>0)的長(zhǎng)軸長(zhǎng)是a. ( )(2)若橢圓的對(duì)稱(chēng)軸為坐標(biāo)軸,長(zhǎng)軸長(zhǎng)與短軸長(zhǎng)分別為10,8,則橢圓的方程為x^2/25+y^2/16=1. ( )(3)設(shè)F為橢圓x^2/a^2 +y^2/b^2 =1(a>b>0)的一個(gè)焦點(diǎn),M為其上任一點(diǎn),則|MF|的最大值為a+c(c為橢圓的半焦距). ( )答案:(1)× (2)× (3)√ 2.已知橢圓C:x^2/a^2 +y^2/4=1的一個(gè)焦點(diǎn)為(2,0),則C的離心率為( )A.1/3 B.1/2 C.√2/2 D.(2√2)/3解析:∵a2=4+22=8,∴a=2√2.∴e=c/a=2/(2√2)=√2/2.故選C.答案:C 三、典例解析例1已知橢圓C1:x^2/100+y^2/64=1,設(shè)橢圓C2與橢圓C1的長(zhǎng)軸長(zhǎng)、短軸長(zhǎng)分別相等,且橢圓C2的焦點(diǎn)在y軸上.(1)求橢圓C1的半長(zhǎng)軸長(zhǎng)、半短軸長(zhǎng)、焦點(diǎn)坐標(biāo)及離心率;(2)寫(xiě)出橢圓C2的方程,并研究其性質(zhì).解:(1)由橢圓C1:x^2/100+y^2/64=1,可得其半長(zhǎng)軸長(zhǎng)為10,半短軸長(zhǎng)為8,焦點(diǎn)坐標(biāo)為(6,0),(-6,0),離心率e=3/5.(2)橢圓C2:y^2/100+x^2/64=1.性質(zhì)如下:①范圍:-8≤x≤8且-10≤y≤10;②對(duì)稱(chēng)性:關(guān)于x軸、y軸、原點(diǎn)對(duì)稱(chēng);③頂點(diǎn):長(zhǎng)軸端點(diǎn)(0,10),(0,-10),短軸端點(diǎn)(-8,0),(8,0);④焦點(diǎn):(0,6),(0,-6);⑤離心率:e=3/5.
二、探究新知一、點(diǎn)到直線(xiàn)的距離、兩條平行直線(xiàn)之間的距離1.點(diǎn)到直線(xiàn)的距離已知直線(xiàn)l的單位方向向量為μ,A是直線(xiàn)l上的定點(diǎn),P是直線(xiàn)l外一點(diǎn).設(shè)(AP) ?=a,則向量(AP) ?在直線(xiàn)l上的投影向量(AQ) ?=(a·μ)μ.點(diǎn)P到直線(xiàn)l的距離為PQ=√(a^2 "-(" a"·" μ")" ^2 ).2.兩條平行直線(xiàn)之間的距離求兩條平行直線(xiàn)l,m之間的距離,可在其中一條直線(xiàn)l上任取一點(diǎn)P,則兩條平行直線(xiàn)間的距離就等于點(diǎn)P到直線(xiàn)m的距離.點(diǎn)睛:點(diǎn)到直線(xiàn)的距離,即點(diǎn)到直線(xiàn)的垂線(xiàn)段的長(zhǎng)度,由于直線(xiàn)與直線(xiàn)外一點(diǎn)確定一個(gè)平面,所以空間點(diǎn)到直線(xiàn)的距離問(wèn)題可轉(zhuǎn)化為空間某一個(gè)平面內(nèi)點(diǎn)到直線(xiàn)的距離問(wèn)題.1.已知正方體ABCD-A1B1C1D1的棱長(zhǎng)為2,E,F分別是C1C,D1A1的中點(diǎn),則點(diǎn)A到直線(xiàn)EF的距離為 . 答案: √174/6解析:如圖,以點(diǎn)D為原點(diǎn),DA,DC,DD1所在直線(xiàn)分別為x軸、y軸、z軸建立空間直角坐標(biāo)系,則A(2,0,0),E(0,2,1),F(1,0,2),(EF) ?=(1,-2,1),
二、探究新知一、空間中點(diǎn)、直線(xiàn)和平面的向量表示1.點(diǎn)的位置向量在空間中,我們?nèi)∫欢c(diǎn)O作為基點(diǎn),那么空間中任意一點(diǎn)P就可以用向量(OP) ?來(lái)表示.我們把向量(OP) ?稱(chēng)為點(diǎn)P的位置向量.如圖.2.空間直線(xiàn)的向量表示式如圖①,a是直線(xiàn)l的方向向量,在直線(xiàn)l上取(AB) ?=a,設(shè)P是直線(xiàn)l上的任意一點(diǎn),則點(diǎn)P在直線(xiàn)l上的充要條件是存在實(shí)數(shù)t,使得(AP) ?=ta,即(AP) ?=t(AB) ?.如圖②,取定空間中的任意一點(diǎn)O,可以得到點(diǎn)P在直線(xiàn)l上的充要條件是存在實(shí)數(shù)t,使(OP) ?=(OA) ?+ta, ①或(OP) ?=(OA) ?+t(AB) ?. ②①式和②式都稱(chēng)為空間直線(xiàn)的向量表示式.由此可知,空間任意直線(xiàn)由直線(xiàn)上一點(diǎn)及直線(xiàn)的方向向量唯一確定.1.下列說(shuō)法中正確的是( )A.直線(xiàn)的方向向量是唯一的B.與一個(gè)平面的法向量共線(xiàn)的非零向量都是該平面的法向量C.直線(xiàn)的方向向量有兩個(gè)D.平面的法向量是唯一的答案:B 解析:由平面法向量的定義可知,B項(xiàng)正確.
本節(jié)課選自《普通高中課程標(biāo)準(zhǔn)實(shí)驗(yàn)教科書(shū)數(shù)學(xué)必修1本(A版)》第五章的5.5.1 兩角和與差的正弦、余弦和正切公式。本節(jié)的主要內(nèi)容是由兩角差的余弦公式的推導(dǎo),運(yùn)用誘導(dǎo)公式、同角三角函數(shù)的基本關(guān)系和代數(shù)變形,得到其它的和差角公式。讓學(xué)生感受數(shù)形結(jié)合及轉(zhuǎn)化的思想方法。發(fā)展學(xué)生數(shù)學(xué)直觀、數(shù)學(xué)抽象、邏輯推理、數(shù)學(xué)建模的核心素養(yǎng)。課程目標(biāo) 學(xué)科素養(yǎng)1.了解兩角差的余弦公式的推導(dǎo)過(guò)程.2.掌握由兩角差的余弦公式推導(dǎo)出兩角和的余弦公式及兩角和與差的正弦、正切公式.3.熟悉兩角和與差的正弦、余弦、正切公式的靈活運(yùn)用,了解公式的正用、逆用以及角的變換的常用方法.4.通過(guò)正切函數(shù)圖像與性質(zhì)的探究,培養(yǎng)學(xué)生數(shù)形結(jié)合和類(lèi)比的思想方法。 a.數(shù)學(xué)抽象:公式的推導(dǎo);b.邏輯推理:公式之間的聯(lián)系;c.數(shù)學(xué)運(yùn)算:運(yùn)用和差角角公式求值;d.直觀想象:兩角差的余弦公式的推導(dǎo);e.數(shù)學(xué)建模:公式的靈活運(yùn)用;
新知講授(一)——隨機(jī)試驗(yàn) 我們把對(duì)隨機(jī)現(xiàn)象的實(shí)現(xiàn)和對(duì)它的觀察稱(chēng)為隨機(jī)試驗(yàn),簡(jiǎn)稱(chēng)試驗(yàn),常用字母E表示。我們通常研究以下特點(diǎn)的隨機(jī)試驗(yàn):(1)試驗(yàn)可以在相同條件下重復(fù)進(jìn)行;(2)試驗(yàn)的所有可能結(jié)果是明確可知的,并且不止一個(gè);(3)每次試驗(yàn)總是恰好出現(xiàn)這些可能結(jié)果中的一個(gè),但事先不確定出現(xiàn)哪個(gè)結(jié)果。新知講授(二)——樣本空間思考一:體育彩票搖獎(jiǎng)時(shí),將10個(gè)質(zhì)地和大小完全相同、分別標(biāo)號(hào)0,1,2,...,9的球放入搖獎(jiǎng)器中,經(jīng)過(guò)充分?jǐn)嚢韬髶u出一個(gè)球,觀察這個(gè)球的號(hào)碼。這個(gè)隨機(jī)試驗(yàn)共有多少個(gè)可能結(jié)果?如何表示這些結(jié)果?根據(jù)球的號(hào)碼,共有10種可能結(jié)果。如果用m表示“搖出的球的號(hào)碼為m”這一結(jié)果,那么所有可能結(jié)果可用集合表示{0,1,2,3,4,5,6,7,8,9}.我們把隨機(jī)試驗(yàn)E的每個(gè)可能的基本結(jié)果稱(chēng)為樣本點(diǎn),全體樣本點(diǎn)的集合稱(chēng)為試驗(yàn)E的樣本空間。
Activity 4: Figuring out the structure and the writing purpose 本活動(dòng)為實(shí)現(xiàn)課時(shí)目標(biāo)2。 1.Read Paragraph 6 and think about its main idea and the writer’s writing purpose. Q1: If you were the author, how would you end your article? “For young people, there is plenty of time to change bad habits. However, there is no “magic pill” or delete button that will help you; you have to think about your bad habits and decide on some changes. You have the power to build a happy and healthy life full of good habits!” Q2: What is Paragraph 6 mainly about? (Possible answer: to appeal to young people including teenagers to change bad habits and live a happy and healthy life.) 2.Think about the writer’s writing purpose and share opinions. Q1: What is the writing purpose? Work in pairs and figure it out. (Possible answer: On the one hand, the passage is written to help teenagers change their bad habits and live a healthy lifestyle. On the other hand, it provides us with a scientific way to identify and analyse our problems objectively, thus strengthening our resolve to tackle the seemingly common yet tough problems in our lives.) 【設(shè)計(jì)意圖】 步驟1旨在預(yù)測(cè)和驗(yàn)證文章最后一段主要內(nèi)容,梳理完整的語(yǔ)篇結(jié)構(gòu),步驟2旨在思考和討論作者的寫(xiě)作目的。教師也可根據(jù)學(xué)生課堂反應(yīng)情況融入對(duì)語(yǔ)篇人稱(chēng)多次轉(zhuǎn)換的思考。
①含義:即國(guó)家管理形式,是國(guó)家政權(quán)的組織形式②政體的必要性和重要性A、行使職能B、維護(hù)其根本利益掌握國(guó)家政權(quán)的階級(jí)為實(shí)現(xiàn)政治統(tǒng)治、行使社會(huì)管理職能,必然要采取某種形式組織政權(quán)機(jī)關(guān)。統(tǒng)治階級(jí)為維護(hù)其根本利益,總是力求采用最有效的政權(quán)組織形式。3、國(guó)體與政體的關(guān)系(板書(shū))(1)、政體的多樣性(2)、國(guó)體與政體的關(guān)系①?lài)?guó)體決定政體,并通過(guò)一定的政體來(lái)體現(xiàn);政體體現(xiàn)國(guó)體,并服務(wù)于特定的國(guó)體。適當(dāng)?shù)恼w能夠鞏固國(guó)體,不適當(dāng)?shù)恼w會(huì)危害國(guó)體。補(bǔ)充:政體由國(guó)體決定并反映國(guó)體,國(guó)體是主要的方面。但是,政體也具有一定的獨(dú)立性,影響它形成的因素主要有:歷史條件、階級(jí)力量對(duì)比、傳統(tǒng)習(xí)慣、國(guó)際環(huán)境影響等。②專(zhuān)政政體國(guó)體與政體,即是國(guó)家制度中內(nèi)容與形式兩個(gè)方面(3)從國(guó)體、政體兩個(gè)方面看民主制國(guó)家補(bǔ)充:專(zhuān)政即是主要依靠暴力實(shí)行的統(tǒng)治,它與民主相對(duì)立,屬于國(guó)體的范疇,而專(zhuān)制則與法制相對(duì)立,屬于政體的范疇。
2. Explore the significance of the establishment of Sarek National Park.Q1: Which event is the most important one in the park’s history?Ss: The establishment of Sarek national park in 1909 is the most important one.Q2: Is it worth making a place like Sarek a national park? Give your reasons.Ss: Yes. In this way, the place can be kept in its natural state and natural beauties and other rare and valuable resources can be preserved instead of being destroyed by endless exploitation driven by profits.Q3: How does the writer organize his introduction to the history of Sarek?Ss: The writer organizes his introduction in the sequence of time, using time indicators such as “used to”, “around 9,000 years ago”, “soon after”, “following the reindeer”, and “in 1909”.Q4: What is the feature of the language used to introduce the history of the park?Ss: The introduction to the park is to provide facts, using time indicators to organize the events. Sentences starts with “third person” and passive voice is used more often, feeling objective.【設(shè)計(jì)意圖】學(xué)生尋找和梳理公園歷史上的重要事件,體會(huì)人與自然的和諧關(guān)系,評(píng)鑒介紹性語(yǔ)言的特點(diǎn)?!竞诵乃仞B(yǎng)提升點(diǎn)】發(fā)展自主提取、梳理文本信息能力,訓(xùn)練邏輯思維和高階思維。Activity 3: Highlighting the secret of the text
[2] An important breakthrough…was… [3] Another innovation was … [4] the emphasis increasingly shifted from…to… [5] New ideas and values gradually replaced… [6] While his paintings still had religious themes… … T: All these expressions serve to show how Western painting has developed. Some of them share similar structure but with varied use of words, which makes the text vivid and more readable. 【設(shè)計(jì)意圖】主題類(lèi)語(yǔ)言整理有助于學(xué)生類(lèi)化語(yǔ)言應(yīng)用,提高語(yǔ)言輸出的豐富性。處理完文本內(nèi)容信息后,進(jìn)入語(yǔ)篇信息處理,進(jìn)行主題相關(guān)的詞塊歸類(lèi)。引導(dǎo)學(xué)生快速閱讀,尋找表達(dá)相同主題(發(fā)展或者藝術(shù))的詞和短語(yǔ),再根據(jù)詞性、用法和結(jié)構(gòu)進(jìn)行歸類(lèi),儲(chǔ)備主題相關(guān)詞匯,豐富語(yǔ)言?xún)?chǔ)備,提升語(yǔ)言素養(yǎng)。 Assignment: Go online to gather more information about Chinese painting and write a short history of it. 【設(shè)計(jì)意圖】結(jié)合所學(xué),遷移運(yùn)用,根據(jù)實(shí)際語(yǔ)境,進(jìn)行模仿性運(yùn)用。在此過(guò)程中,學(xué)生嘗試借鑒已學(xué)的語(yǔ)言、內(nèi)容、語(yǔ)篇結(jié)構(gòu)和寫(xiě)作手法來(lái)建構(gòu)新文本,實(shí)現(xiàn)語(yǔ)篇輸出,同時(shí)關(guān)注中西藝術(shù)文化的差別,加深對(duì)優(yōu)秀文化的認(rèn)同,培養(yǎng)文化意識(shí)。
本活動(dòng)旨在落實(shí)課時(shí)目標(biāo)3。 The Student Union is looking for three students for a 3-week voluntary program in Guizhou province. The volunteers have got to be high school students, with a persevering personality and experiences in overcoming adversity. The volunteers need to stay, eat and teach with 20 pupils in a small school up on the hill of a village. There are no facilities but desks and a blackboard in the school. And there is no take-away food to be bought anywhere; the only way to feed yourself is to cook. You’re interested in applying. Write your application letter introducing what adversity you have ever overcome and how persevering you are as well as what you want to do when at work. Dear Student Union,【設(shè)計(jì)意圖】此任務(wù)旨在遷移一、二課時(shí)所學(xué),解決實(shí)際問(wèn)題。學(xué)生對(duì)比自己經(jīng)歷過(guò)的挑戰(zhàn)或挫折,寫(xiě)信給學(xué)生會(huì)申請(qǐng)前往貴州擔(dān)任短期支教教師,把個(gè)人以前是怎么戰(zhàn)勝挫折的經(jīng)過(guò)書(shū)寫(xiě)出來(lái)。結(jié)合所學(xué),遷移創(chuàng)新,分析解決自身實(shí)際問(wèn)題,在真實(shí)情境中學(xué)生通過(guò)仿寫(xiě)進(jìn)行主題語(yǔ)言的精確輸出。完成任務(wù)的過(guò)程中,能較多地使用已學(xué)語(yǔ)言、內(nèi)容、結(jié)構(gòu)和寫(xiě)作手法來(lái)描述自己面對(duì)挫折的處理方式、態(tài)度和應(yīng)有的品質(zhì),近一步激發(fā)學(xué)生樹(shù)立正確的價(jià)值觀,學(xué)會(huì)逆境出人才,堅(jiān)忍不拔,從容不迫,又做到謙讓、分享和合作。課后學(xué)生修正習(xí)作,再次提交。
本單元閱讀文本介紹了幾種簡(jiǎn)單的英語(yǔ)詩(shī)歌形式,旨在讓學(xué)生能理解和欣賞英語(yǔ)詩(shī)歌的美,包括形式美、內(nèi)容美、意義美,培養(yǎng)審美情趣,并從作品的意義美中獲得積極的人生態(tài)度和價(jià)值觀念啟示。 該文本是一則典型的說(shuō)明性文本,用簡(jiǎn)單易懂的語(yǔ)言向英語(yǔ)詩(shī)歌的初學(xué)者們介紹了五種比較簡(jiǎn)單的英語(yǔ)詩(shī)歌形式。文題“A Few Simple Forms of English Poems”是整個(gè)文本的核心話(huà)題。正文內(nèi)容共七段,按“總—分—總”建構(gòu)。第一段為總起段,概述了英語(yǔ)詩(shī)歌的創(chuàng)作原因以及主要特點(diǎn),涉及了形式、內(nèi)容、意義等方面賞析英語(yǔ)詩(shī)歌的幾個(gè)主要維度;第二段至第六段分別介紹了童謠、清單詩(shī)、五行詩(shī)、俳句和唐詩(shī)五種英語(yǔ)詩(shī)歌形式;第七段收尾,鼓勵(lì)讀者嘗試英語(yǔ)詩(shī)歌創(chuàng)作。 在進(jìn)行文本教學(xué)設(shè)計(jì)時(shí),要引導(dǎo)學(xué)生梳理關(guān)于與詩(shī)歌要素和詩(shī)歌賞析有關(guān)的話(huà)題類(lèi)語(yǔ)言,既包括format、rhythm、subject、image等名詞,也包括have a strong rhythm、be made up of、contain、consist of、convey這樣的動(dòng)詞和動(dòng)詞短語(yǔ)。
本活動(dòng)旨在落實(shí)課時(shí)目標(biāo)3。 Think about the following questions and talk about your own attitude in pairs.Q1: As for this topic,what impresses you the most in the passage?Q2: What do you think of the future of China’s further exploration in sea? Are you in favor of the further exploration?Why or why not? 【設(shè)計(jì)意圖】該活動(dòng)是一個(gè)完全開(kāi)放性的活動(dòng),每個(gè)學(xué)生都會(huì)有不同的答案。運(yùn)用遷移所學(xué),自由口頭表達(dá)自己對(duì)海洋探索的態(tài)度。對(duì)于中國(guó)海洋探索的未來(lái),每個(gè)人的想法是不一樣的,有樂(lè)觀,有擔(dān)憂(yōu),有認(rèn)為值得投入,也有認(rèn)為不值得付出太大代價(jià),這里給學(xué)生自由表達(dá)的空間只要學(xué)會(huì)有支撐自己觀點(diǎn)的事實(shí)就可以了,進(jìn)一步培養(yǎng)學(xué)生批判性思維和正確的價(jià)值觀。 Assignment: 此任務(wù)旨在遷移一、二課時(shí)所學(xué),培養(yǎng)學(xué)生辯證分析問(wèn)題的能力。 Write about your idea of the future of China’s sea exploration. And add your attitude towards the effort China have made in sea exploration. You’re expected to use the language and the writing technique learnt in the passage.
【設(shè)計(jì)意圖】以“新科技是一把雙刃劍”為主題開(kāi)展討論活動(dòng)。這個(gè)話(huà)題比較大,所以給了一定的限制,首先需要以智能家居為例來(lái)闡述科技發(fā)展對(duì)未來(lái)生活產(chǎn)生的影響,然后列舉其優(yōu)點(diǎn)和缺點(diǎn),最后就以上現(xiàn)象發(fā)表自己的觀點(diǎn)。這個(gè)活動(dòng)是對(duì)整個(gè)文本的創(chuàng)意性總結(jié)與意義的升華,留給學(xué)生一定的想象空間,學(xué)生借此機(jī)會(huì)可以運(yùn)用文本內(nèi)容和語(yǔ)言表達(dá)自己對(duì)科技發(fā)展的看法和態(tài)度。Assignments:1. Finish Exercise 4 on Page 15 of the textbook.A smart home is one that integrated computers into the structure of the building itself. In this way, many of the things that we now do ourselves become automatic. For example, the smart home could control the air conditioning and lights so that you would no longer have to turn switches on and off, and so that your home would be more energy-efficient. The smart home could also monitor itself to make sure that everything is working as it should, and send you warnings if there is a problem. Such smart homes could even be programmed to detect your health problems, and then give you reasonable advice as to the food you should eat or if you should see a doctor. So, in a sense, smart homes will lead us to living smarter lives.2.Create a smart function for your home, and share your creation in the next period.
幫助學(xué)生通過(guò)討論與對(duì)主題的提升,反思自己的旅游方式,以便做出更優(yōu)化的安排,在今后的旅程中有更多的收益。 Activity 2: Further discussion of the 6 elements above and supplement of more background knowledge 本活動(dòng)為實(shí)現(xiàn)課時(shí)教學(xué)目標(biāo)2。 1.Target Q: The writer’s clear target of traveling, meeting the people and experiencing the culture, is closely related to his major in social studies. Then what is social studies? Social studies is a part of a school or college curriculum concerned with the study of social relationships and the functioning of society and usually made up of courses in history, government, economics, civics, sociology, geography, and anthropology. (Dictionary by Merriam-Webster) Reflection: When you go out to travel, what targets do you usually have in mind? 2.Research Q: Suppose you are traveling to Hangzhou during the school holidays, how will you do research on the city? (surf the internet, read books or travel brochures, consult friends, ...) What information will you be interested to know? (location, iconic sites, local cuisines, interesting customs, shopping malls ...) 3.Abandonment To make the most of time, we have to learn to abandon so that we can accomplish our plan. What will you be interested in doing if you go to Hangzhou if you have a week’s time? What if you only have 2 days? 4~5. Venturing & Experiencing Q: What did he venture to do during the trip? What new experiences did he have? In Sydney: attend his first open-air barbecue, enjoy many different but yummy meals In Catherine: observe the life and customs of the aborigines appreciate their music & try the musical instruments: the didgeridoo
一、激趣導(dǎo)入 多媒體顯示寫(xiě)杜甫的對(duì)聯(lián): 詩(shī)史數(shù)千言,秋天一鵠先生骨;草堂三五里,春水群毆野老心?! ?、提問(wèn):同學(xué)們知道這幅對(duì)聯(lián)是寫(xiě)誰(shuí)的嗎?請(qǐng)大家回憶一下我們學(xué)過(guò)他的那些作品?能背誦一首我們共同欣賞嗎?(學(xué)生背誦)今天我們來(lái)學(xué)習(xí)他的另一首詩(shī)歌《登高》(板書(shū))
(2)、中國(guó)堅(jiān)持以互利合作實(shí)現(xiàn)共同繁榮----促進(jìn)共同發(fā)展中國(guó)堅(jiān)持以互利合作實(shí)現(xiàn)共同繁榮。中國(guó)連續(xù)擔(dān)任經(jīng)社理事會(huì)理事國(guó),積極參與經(jīng)社系統(tǒng)有關(guān)經(jīng)濟(jì)和社會(huì)發(fā)展的重要國(guó)際會(huì)議和其他活動(dòng)并承辦了聯(lián)合國(guó)第四次世界婦女大會(huì)。中國(guó)積極推動(dòng)南北對(duì)話(huà)和南南合作,敦促發(fā)達(dá)國(guó)家為實(shí)現(xiàn)全球普遍、協(xié)調(diào)、均衡發(fā)展承擔(dān)更多責(zé)任。中國(guó)加人多項(xiàng)國(guó)際人權(quán)公約并認(rèn)真履行公約義務(wù),與聯(lián)合國(guó)人權(quán)事務(wù)高級(jí)專(zhuān)員保持良好合作,與多國(guó)展開(kāi)人權(quán)對(duì)話(huà)。相關(guān)鏈接:1995年9月,聯(lián)合國(guó)第四次世界婦女大會(huì)在北京舉行。來(lái)自197個(gè)國(guó)家和地區(qū)以及眾多國(guó)際組織的1.76萬(wàn)名代表圍繞會(huì)議主題“以行動(dòng)謀求平等、發(fā)展與和平”展開(kāi)熱烈討論。會(huì)議通過(guò)了《北京宣言》和《行動(dòng)綱領(lǐng)》,為全球婦女事業(yè)的發(fā)展注入了新的活力。
3、聯(lián)邦制的弊端:(1)、效率不高:(2)、集團(tuán)分享權(quán)力,維護(hù)資產(chǎn)階級(jí)的利益,不顧人民要求。在美國(guó)實(shí)行聯(lián)邦制的二百多年問(wèn),聯(lián)邦制的弊端也顯露無(wú)遺。美國(guó)聯(lián)邦制的最大問(wèn)題是效率不高,聯(lián)邦政府與州政府之間相互扯皮、推諉,各州政府之間各自為政。全國(guó)性資產(chǎn)階級(jí)利益集團(tuán)與地方性資產(chǎn)階級(jí)利益集團(tuán)分享權(quán)力,對(duì)于廣大人民群眾的要求,資產(chǎn)階級(jí)則利用國(guó)家結(jié)構(gòu)形式的特點(diǎn)相互推卸責(zé)任。當(dāng)大多數(shù)資產(chǎn)階級(jí)利益集團(tuán)意見(jiàn)接近時(shí),聯(lián)邦制既能保護(hù)州的靈活性,又能保證中央的權(quán)威;當(dāng)資產(chǎn)階級(jí)利益集團(tuán)之間矛盾重重時(shí),聯(lián)邦制就處于低效運(yùn)轉(zhuǎn)之中。相關(guān)鏈接:1954年,美國(guó)最高法院在一項(xiàng)判決中宣布,公立學(xué)校實(shí)行種族隔離、拒絕黑人入學(xué)是違反憲法的。這一裁決引起南方一些州的抵制,一些州竟以暴力阻止黑人進(jìn)入公立學(xué)校。
4、中國(guó)積極發(fā)展與區(qū)域性國(guó)際組織的關(guān)系。中國(guó)積極發(fā)展與區(qū)域性國(guó)際組織的關(guān)系。中國(guó)與歐盟建立了領(lǐng)導(dǎo)人年度會(huì)晤機(jī)制,致力于發(fā)展全面戰(zhàn)略伙伴關(guān)系。中國(guó)重視與非洲國(guó)家的傳統(tǒng)友誼,與非洲聯(lián)盟團(tuán)結(jié)合作。中國(guó)與阿拉伯國(guó)家聯(lián)盟、石油輸出國(guó)組織等發(fā)展中國(guó)家組建的國(guó)際組織發(fā)展友好關(guān)系,支持它們維護(hù)自身的正當(dāng)權(quán)益,并與它們共同為建立公正合理的國(guó)際政治經(jīng)濟(jì)新秩序而努力。新中國(guó)與國(guó)際組織關(guān)系的歷史演變大致經(jīng)歷了三個(gè)時(shí)期。從中華人民共和國(guó)建立初期到1971年:新中國(guó)被排斥在聯(lián)合國(guó)等國(guó)際組織之外,為恢復(fù)在聯(lián)合國(guó)的合法席位進(jìn)行了不懈的斗爭(zhēng)。從1 9 7 1年到改革開(kāi)放前:中國(guó)恢復(fù)了在聯(lián)合國(guó)的合法席位,并與大批國(guó)際組織建立、恢復(fù)了友好合作關(guān)系。改革開(kāi)放以來(lái):中國(guó)恢復(fù)了在世界銀行和國(guó)際貨幣基金組織的席位,加入了世界貿(mào)易組織、亞太經(jīng)合組織等經(jīng)濟(jì)組織。世界銀行出資興建的希望小學(xué)小結(jié):4個(gè)主要特征:國(guó)際組織的四個(gè)主要特征即:①跨國(guó)性、②目的性、③組織性、④自主性。
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