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人教版高中數(shù)學(xué)選修3離散型隨機(jī)變量及其分布列(2)教學(xué)設(shè)計(jì)
溫故知新 1.離散型隨機(jī)變量的定義可能取值為有限個(gè)或可以一一列舉的隨機(jī)變量,我們稱為離散型隨機(jī)變量.通常用大寫英文字母表示隨機(jī)變量,例如X,Y,Z;用小寫英文字母表示隨機(jī)變量的取值,例如x,y,z.隨機(jī)變量的特點(diǎn): 試驗(yàn)之前可以判斷其可能出現(xiàn)的所有值，在試驗(yàn)之前不可能確定取何值；可以用數(shù)字表示2、隨機(jī)變量的分類①離散型隨機(jī)變量:X的取值可一、一列出；②連續(xù)型隨機(jī)變量:X可以取某個(gè)區(qū)間內(nèi)的一切值隨機(jī)變量將隨機(jī)事件的結(jié)果數(shù)量化．3、古典概型:①試驗(yàn)中所有可能出現(xiàn)的基本事件只有有限個(gè)；②每個(gè)基本事件出現(xiàn)的可能性相等。二、探究新知探究1.拋擲一枚骰子,所得的點(diǎn)數(shù)X有哪些值？取每個(gè)值的概率是多少？ 因?yàn)閄取值范圍是{1，2，3，4，5，6}而且"P(X=m)"=1/6,m=1,2,3,4,5,6.因此X分布列如下表所示
人教版高中數(shù)學(xué)選修3二項(xiàng)式系數(shù)的性質(zhì)教學(xué)設(shè)計(jì)
1.對(duì)稱性與首末兩端“等距離”的兩個(gè)二項(xiàng)式系數(shù)相等,即C_n^m=C_n^(n"-" m).2.增減性與最大值 當(dāng)k(n+1)/2時(shí),C_n^k隨k的增加而減小.當(dāng)n是偶數(shù)時(shí),中間的一項(xiàng)C_n^(n/2)取得最大值;當(dāng)n是奇數(shù)時(shí),中間的兩項(xiàng)C_n^((n"-" 1)/2) 與C_n^((n+1)/2)相等,且同時(shí)取得最大值.探究2.已知(1+x)^n =C_n^0+C_n^1 x+...〖+C〗_n^k x^k+...+C_n^n x^n 3.各二項(xiàng)式系數(shù)的和C_n^0+C_n^1+C_n^2+…+C_n^n=2n.令x=1 得(1+1)^n=C_n^0+C_n^1 +...+C_n^n=2^n所以，(a+b)^n 的展開式的各二項(xiàng)式系數(shù)之和為2^n1. 在(a+b)8的展開式中,二項(xiàng)式系數(shù)最大的項(xiàng)為 ,在(a+b)9的展開式中,二項(xiàng)式系數(shù)最大的項(xiàng)為 . 解析:因?yàn)?a+b)8的展開式中有9項(xiàng),所以中間一項(xiàng)的二項(xiàng)式系數(shù)最大,該項(xiàng)為C_8^4a4b4=70a4b4.因?yàn)?a+b)9的展開式中有10項(xiàng),所以中間兩項(xiàng)的二項(xiàng)式系數(shù)最大,這兩項(xiàng)分別為C_9^4a5b4=126a5b4,C_9^5a4b5=126a4b5.答案:1.70a4b4 126a5b4與126a4b5 2. A=C_n^0+C_n^2+C_n^4+…與B=C_n^1+C_n^3+C_n^5+…的大小關(guān)系是( )A.A>B B.A=B C.A<B D.不確定 解析:∵(1+1)n=C_n^0+C_n^1+C_n^2+…+C_n^n=2n,(1-1)n=C_n^0-C_n^1+C_n^2-…+(-1)nC_n^n=0,∴C_n^0+C_n^2+C_n^4+…=C_n^1+C_n^3+C_n^5+…=2n-1,即A=B.答案:B
人教版高中數(shù)學(xué)選修3一元線性回歸模型及其應(yīng)用教學(xué)設(shè)計(jì)
1.確定研究對(duì)象，明確哪個(gè)是解釋變量，哪個(gè)是響應(yīng)變量；2.由經(jīng)驗(yàn)確定非線性經(jīng)驗(yàn)回歸方程的模型；3.通過變換，將非線性經(jīng)驗(yàn)回歸模型轉(zhuǎn)化為線性經(jīng)驗(yàn)回歸模型；4.按照公式計(jì)算經(jīng)驗(yàn)回歸方程中的參數(shù)，得到經(jīng)驗(yàn)回歸方程；5.消去新元，得到非線性經(jīng)驗(yàn)回歸方程；6.得出結(jié)果后分析殘差圖是否有異常 ．跟蹤訓(xùn)練1.一只藥用昆蟲的產(chǎn)卵數(shù)y與一定范圍內(nèi)的溫度x有關(guān)，現(xiàn)收集了6組觀測(cè)數(shù)據(jù)列于表中： 經(jīng)計(jì)算得： 線性回歸殘差的平方和: ∑_(i=1)^6?〖(y_i-(y_i ) ?)〗^2=236,64,e^8.0605≈3167.其中 分別為觀測(cè)數(shù)據(jù)中的溫度和產(chǎn)卵數(shù)，i=1,2,3,4,5,6.(1)若用線性回歸模型擬合，求y關(guān)于x的回歸方程 (精確到0.1）；(2)若用非線性回歸模型擬合，求得y關(guān)于x回歸方程為 且相關(guān)指數(shù)R2＝0.9522． ①試與(1)中的線性回歸模型相比較，用R2說明哪種模型的擬合效果更好 ?②用擬合效果好的模型預(yù)測(cè)溫度為35℃時(shí)該種藥用昆蟲的產(chǎn)卵數(shù).(結(jié)果取整數(shù)).
人教A版高中數(shù)學(xué)必修一用二分法求方程的近似解教學(xué)設(shè)計(jì)（2）
本節(jié)通過學(xué)習(xí)用二分法求方程近似解的的方法，使學(xué)生體會(huì)函數(shù)與方程之間的關(guān)系，通過一些函數(shù)模型的實(shí)例，讓學(xué)生感受建立函數(shù)模型的過程和方法，體會(huì)函數(shù)在數(shù)學(xué)和其他學(xué)科中的廣泛應(yīng)用，進(jìn)一步認(rèn)識(shí)到函數(shù)是描述客觀世界變化規(guī)律的基本數(shù)學(xué)模型，能初步運(yùn)用函數(shù)思想解決一些生活中的簡(jiǎn)單問題。課程目標(biāo)1.了解二分法的原理及其適用條件.2.掌握二分法的實(shí)施步驟.3.通過用二分法求方程的近似解，使學(xué)生體會(huì)函數(shù)零點(diǎn)與方程根之間的聯(lián)系，初步形成用函數(shù)觀點(diǎn)處理問題的意識(shí).數(shù)學(xué)學(xué)科素養(yǎng)1.數(shù)學(xué)抽象：二分法的概念；2.邏輯推理：用二分法求函數(shù)零點(diǎn)近似值的步驟；3.數(shù)學(xué)運(yùn)算：求函數(shù)零點(diǎn)近似值；4.數(shù)學(xué)建模：通過一些函數(shù)模型的實(shí)例，讓學(xué)生感受建立函數(shù)模型的過程和方法，體會(huì)函數(shù)在數(shù)學(xué)和其他學(xué)科中的廣泛應(yīng)用.
人教A版高中數(shù)學(xué)必修一函數(shù)的表示法教學(xué)設(shè)計(jì)（1）
本節(jié)課選自《普通高中課程標(biāo)準(zhǔn)數(shù)學(xué)教科書-必修一》（人教A版）第三章《函數(shù)的概念與性質(zhì)》，本節(jié)課是第2課時(shí)，本節(jié)課主要學(xué)習(xí)函數(shù)的三種表示方法及其簡(jiǎn)單應(yīng)用，進(jìn)一步加深對(duì)函數(shù)概念的理解。課本從引進(jìn)函數(shù)概念開始就比較注重函數(shù)的不同表示方法：解析法，圖象法，列表法．函數(shù)的不同表示方法能豐富對(duì)函數(shù)的認(rèn)識(shí)，幫助理解抽象的函數(shù)概念．特別是在信息技術(shù)環(huán)境下，可以使函數(shù)在形與數(shù)兩方面的結(jié)合得到更充分的表現(xiàn)，使學(xué)生通過函數(shù)的學(xué)習(xí)更好地體會(huì)數(shù)形結(jié)合這種重要的數(shù)學(xué)思想方法．因此，在研究函數(shù)時(shí)，要充分發(fā)揮圖象的直觀作用．課程目標(biāo) 學(xué)科素養(yǎng)A.在實(shí)際情景中，會(huì)根據(jù)不同的需要選擇恰當(dāng)?shù)姆椒ǎń馕鍪椒?、圖象法、列表法）表示函數(shù)；B.了解簡(jiǎn)單的分段函數(shù)，并能簡(jiǎn)單地應(yīng)用；1.數(shù)學(xué)抽象：函數(shù)解析法及能由條件求函數(shù)的解析式；2.邏輯推理：求函數(shù)的解析式；
人教A版高中數(shù)學(xué)必修一函數(shù)的表示法教學(xué)設(shè)計(jì)（2）
課本從引進(jìn)函數(shù)概念開始就比較注重函數(shù)的不同表示方法：解析法，圖象法，列表法．函數(shù)的不同表示方法能豐富對(duì)函數(shù)的認(rèn)識(shí)，幫助理解抽象的函數(shù)概念．特別是在信息技術(shù)環(huán)境下，可以使函數(shù)在形與數(shù)兩方面的結(jié)合得到更充分的表現(xiàn)，使學(xué)生通過函數(shù)的學(xué)習(xí)更好地體會(huì)數(shù)形結(jié)合這種重要的數(shù)學(xué)思想方法．因此，在研究函數(shù)時(shí)，要充分發(fā)揮圖象的直觀作用．在研究圖象時(shí)，又要注意代數(shù)刻畫以求思考和表述的精確性．課本將映射作為函數(shù)的一種推廣，這與傳統(tǒng)的處理方式有了邏輯順序上的變化．這樣處理，主要是想較好地銜接初中的學(xué)習(xí)，讓學(xué)生將更多的精力集中理解函數(shù)的概念，同時(shí)，也體現(xiàn)了從特殊到一般的思維過程．課程目標(biāo)1、明確函數(shù)的三種表示方法；2、在實(shí)際情境中，會(huì)根據(jù)不同的需要選擇恰當(dāng)?shù)姆椒ū硎竞瘮?shù)；3、通過具體實(shí)例，了解簡(jiǎn)單的分段函數(shù)，并能簡(jiǎn)單應(yīng)用.
人教A版高中數(shù)學(xué)必修一用二分法求方程的近似解教學(xué)設(shè)計(jì)（1）
《數(shù)學(xué)1必修本（A版）》的第五章4.5.2用二分法求方程的近似解．本節(jié)課要求學(xué)生根據(jù)具體的函數(shù)圖象能夠借助計(jì)算機(jī)或信息技術(shù)工具計(jì)算器用二分法求相應(yīng)方程的近似解，了解這種方法是求方程近似解的常用方法，從中體會(huì)函數(shù)與方程之間的聯(lián)系；它既是本冊(cè)書中的重點(diǎn)內(nèi)容，又是對(duì)函數(shù)知識(shí)的拓展，既體現(xiàn)了函數(shù)在解方程中的重要應(yīng)用，同時(shí)又為高中數(shù)學(xué)中函數(shù)與方程思想、數(shù)形結(jié)合思想、二分法的算法思想打下了基礎(chǔ)，因此決定了它的重要地位．發(fā)展學(xué)生數(shù)學(xué)直觀、數(shù)學(xué)抽象、邏輯推理和數(shù)學(xué)建模的核心素養(yǎng)。課程目標(biāo) 學(xué)科素養(yǎng)1.通過具體實(shí)例理解二分法的概念及其使用條件．2.了解二分法是求方程近似解的常用方法，能借助計(jì)算器用二分法求方程的近似解．3.會(huì)用二分法求一個(gè)函數(shù)在給定區(qū)間內(nèi)的零點(diǎn)，從而求得方程的近似解． a.數(shù)學(xué)抽象：二分法的概念；b.邏輯推理：運(yùn)用二分法求近似解的原理；
人教A版高中數(shù)學(xué)必修二向量的減法運(yùn)算教學(xué)設(shè)計(jì)
新知探究：向量的減法運(yùn)算定義問題四：你能根據(jù)實(shí)數(shù)的減法運(yùn)算定義向量的減法運(yùn)算嗎？由兩個(gè)向量和的定義已知 即任意向量與其相反向量的和是零向量。求兩個(gè)向量差的運(yùn)算叫做向量的減法。我們看到，向量的減法可以轉(zhuǎn)化為向量的加法來進(jìn)行：減去一個(gè)向量相當(dāng)于加上這個(gè)向量的相反向量。即新知探究（二）：向量減法的作圖方法知識(shí)探究（三）：向量減法的幾何意義問題六：根據(jù)問題五，思考一下向量減法的幾何意義是什么？問題七：非零共線向量怎樣做減法運(yùn)算？ 問題八：非零共線向量怎樣做減法運(yùn)算？1.共線同向2.共線反向小試牛刀判一判(正確的打“√”，錯(cuò)誤的打“×”)(1)兩個(gè)向量的差仍是一個(gè)向量。 (√ )(2)向量的減法實(shí)質(zhì)上是向量的加法的逆運(yùn)算. ( √ )(3)向量a與向量b的差與向量b與向量a的差互為相反向量。 ( √ )(4)相反向量是共線向量。 ( √ )
人教版高中數(shù)學(xué)選擇性必修二導(dǎo)數(shù)的四則運(yùn)算法則教學(xué)設(shè)計(jì)
求函數(shù)的導(dǎo)數(shù)的策略(1)先區(qū)分函數(shù)的運(yùn)算特點(diǎn)，即函數(shù)的和、差、積、商，再根據(jù)導(dǎo)數(shù)的運(yùn)算法則求導(dǎo)數(shù)；(2)對(duì)于三個(gè)以上函數(shù)的積、商的導(dǎo)數(shù)，依次轉(zhuǎn)化為“兩個(gè)”函數(shù)的積、商的導(dǎo)數(shù)計(jì)算．跟蹤訓(xùn)練1 求下列函數(shù)的導(dǎo)數(shù)：(1)y＝x2＋log3x； (2)y＝x3·ex； (3)y＝cos xx.[解] (1)y′＝(x2＋log3x)′＝(x2)′＋(log3x)′＝2x＋1xln 3.(2)y′＝(x3·ex)′＝(x3)′·ex＋x3·(ex)′＝3x2·ex＋x3·ex＝ex(x3＋3x2)．(3)y′＝cos xx′＝?cos x?′·x－cos x·?x?′x2＝－x·sin x－cos xx2＝－xsin x＋cos xx2.跟蹤訓(xùn)練2 求下列函數(shù)的導(dǎo)數(shù)（1）y＝tan x； （2）y＝2sin x2cos x2解析：（1）y＝tan x＝sin xcos x，故y′＝?sin x?′cos x－?cos x?′sin x?cos x?2＝cos2x＋sin2xcos2x＝1cos2x.（2）y＝2sin x2cos x2＝sin x，故y′＝cos x.例5 日常生活中的飲用水通常是經(jīng)過凈化的，隨著水的純凈度的提高，所需進(jìn)化費(fèi)用不斷增加，已知將1t水進(jìn)化到純凈度為x%所需費(fèi)用（單位：元），為c(x)=5284/(100-x) (80<x<100)求進(jìn)化到下列純凈度時(shí)，所需進(jìn)化費(fèi)用的瞬時(shí)變化率：（1） 90% ；（2） 98%解：凈化費(fèi)用的瞬時(shí)變化率就是凈化費(fèi)用函數(shù)的導(dǎo)數(shù)；c^' (x)=〖(5284/(100-x))〗^'=(5284^’×(100-x)-"5284 " 〖(100-x)〗^’)/〖(100-x)〗^2 =(0×(100-x)-"5284 " ×(-1))/〖(100-x)〗^2 ="5284 " /〖(100-x)〗^2
高教版中職數(shù)學(xué)基礎(chǔ)模塊下冊(cè)：10.1《計(jì)數(shù)原理》教學(xué)設(shè)計(jì)
授課 日期 班級(jí)16高造價(jià) 課題： §10.1 計(jì)數(shù)原理 教學(xué)目的要求： 1.掌握分類計(jì)數(shù)原理與分步計(jì)數(shù)原理的概念和區(qū)別； 2.能利用兩個(gè)原理分析和解決一些簡(jiǎn)單的應(yīng)用問題； 3.通過對(duì)一些應(yīng)用問題的分析，培養(yǎng)自己的歸納概括和邏輯判斷能力. 教學(xué)重點(diǎn)、難點(diǎn): 兩個(gè)原理的概念與區(qū)別 授課方法： 任務(wù)驅(qū)動(dòng)法 小組合作學(xué)習(xí)法 教學(xué)參考及教具（含多媒體教學(xué)設(shè)備）： 《單招教學(xué)大綱》、課件 授課執(zhí)行情況及分析： 板書設(shè)計(jì)或授課提綱 §10.1 計(jì)數(shù)原理 1、加法原理 2、乘法原理 3、兩個(gè)原理的區(qū)別
高教版中職數(shù)學(xué)基礎(chǔ)模塊下冊(cè)：10.4《用樣本估計(jì)總體》教學(xué)設(shè)計(jì)
教 學(xué) 過 程教師 行為學(xué)生 行為教學(xué) 意圖時(shí)間 *揭示課題 10.4 用樣本估計(jì)總體 *創(chuàng)設(shè)情境 興趣導(dǎo)入 【知識(shí)回顧】 初中我們?cè)?jīng)學(xué)習(xí)過頻數(shù)分布圖和頻數(shù)分布表，利用它們可以清楚地看到數(shù)據(jù)分布在各個(gè)組內(nèi)的個(gè)數(shù)． 【知識(shí)鞏固】 例1 某工廠從去年全年生產(chǎn)某種零件的日產(chǎn)記錄(件)中隨機(jī)抽取30份，得到以下數(shù)據(jù)： 346 345 347 357 349 352 341 345 358 350 354 344 346 342 345 358 348 345 346 357 350 345 352 349 346 356 351 355 352 348 列出頻率分布表． 解 分析樣本的數(shù)據(jù)．其最大值是358，最小值是341，它們的差是358－341=17．取組距為3，確定分點(diǎn)，將數(shù)據(jù)分為6組． 列出頻數(shù)分布表 【小提示】 設(shè)定分點(diǎn)數(shù)值時(shí)需要考慮分點(diǎn)值不要與樣本數(shù)據(jù)重合． 分 組頻 數(shù) 累 計(jì)頻 數(shù)340.5～343.5┬2343.5～346.5正 正10346.5～349.5正5349.5～352.5正 ￣6352.5～355.5┬2355.5～358.5正5合 計(jì)3030 介紹 質(zhì)疑 引領(lǐng) 分析 講解 說明 了解 觀察 思考 解答 啟發(fā) 學(xué)生思考 0 10*動(dòng)腦思考 探索新知 【新知識(shí)】 各組內(nèi)數(shù)據(jù)的個(gè)數(shù)，叫做該組的頻數(shù)．每組的頻數(shù)與全體數(shù)據(jù)的個(gè)數(shù)之比叫做該組的頻率． 計(jì)算上面頻數(shù)分布表中各組的頻率，得到頻率分布表如表10－8所示． 表10－8 分 組頻 數(shù)頻 率340.5～343.520.067343.5～346.5100.333346.5～349.550.167349.5～352.560.2352.5～355.520.067355.5～358.550.166合 計(jì)301.000 根據(jù)頻率分布表，可以畫出頻率分布直方圖（如圖10－4）． 圖10－4 頻率分布直方圖的橫軸表示數(shù)據(jù)分組情況，以組距為單位；縱軸表示頻率與組距之比．因此，某一組距的頻率數(shù)值上等于對(duì)應(yīng)矩形的面積． 【想一想】 各小矩形的面積之和應(yīng)該等于1．為什么呢？ 【新知識(shí)】 圖10－4顯示，日產(chǎn)量為344~346件的天數(shù)最多，其頻率等于該矩形的面積，即 ． 根據(jù)樣本的數(shù)據(jù)，可以推測(cè)，去年的生產(chǎn)這種零件情況：去年約有的天數(shù)日產(chǎn)量為344~346件． 頻率分布直方圖可以直觀地反映樣本數(shù)據(jù)的分布情況．由此可以推斷和估計(jì)總體中某事件發(fā)生的概率．樣本選擇得恰當(dāng)，這種估計(jì)是比較可信的． 如上所述，用樣本的頻率分布估計(jì)總體的步驟為： (1) 選擇恰當(dāng)?shù)某闃臃椒ǖ玫綐颖緮?shù)據(jù)； (2) 計(jì)算數(shù)據(jù)最大值和最小值、確定組距和組數(shù)，確定分點(diǎn)并列出頻率分布表； (3) 繪制頻率分布直方圖； (4) 觀察頻率分布表與頻率分布直方圖，根據(jù)樣本的頻率分布，估計(jì)總體中某事件發(fā)生的概率． 【軟件鏈接】 利用與教材配套的軟件（也可以使用其他軟件），可以方便的繪制樣本數(shù)據(jù)的頻率分布直方圖，如圖10－5所示． 圖10?5 講解 說明 引領(lǐng) 分析 仔細(xì) 分析 關(guān)鍵 語(yǔ)句 觀察 理解 記憶 帶領(lǐng) 學(xué)生 分析 25
新人教版高中英語(yǔ)選修2Unit 1 Science and Scientists-Discovering useful structures教學(xué)設(shè)計(jì)
The grammatical structure of this unit is predicative clause. Like object clause and subject clause, predicative clause is one of Nominal Clauses. The leading words of predicative clauses are that, what, how, what, where, as if, because, etc.The design of teaching activities aims to guide students to perceive the structural features of predicative clauses and think about their ideographic functions. Beyond that, students should be guided to use this grammar in the context apporpriately and flexibly.1. Enable the Ss to master the usage of the predicative clauses in this unit.2. Enable the Ss to use the predicative patterns flexibly.3. Train the Ss to apply some skills by doing the relevant exercises.1.Guide students to perceive the structural features of predicative clauses and think about their ideographic functions.2.Strengthen students' ability of using predicative clauses in context, but also cultivate their ability of text analysis and logical reasoning competence.Step1: Underline all the examples in the reading passage, where noun clauses are used as the predicative. Then state their meaning and functions.1) One theory was that bad air caused the disease.2) Another theory was that cholera was caused by an infection from germs in food or water.3) The truth was that the water from the Broad Street had been infected by waste.Sum up the rules of grammar:1. 以上黑體部分在句中作表語(yǔ)。2. 句1、2、3中的that在從句中不作成分，只起連接作用。 Step2: Review the basic components of predicative clauses1.Definition
新人教版高中英語(yǔ)選修2Unit 4 Journey Across a Vast Land教學(xué)設(shè)計(jì)
當(dāng)孩子們由父母陪同時(shí)，他們才被允許進(jìn)入這個(gè)運(yùn)動(dòng)場(chǎng)。3．過去分詞(短語(yǔ))作狀語(yǔ)時(shí)的幾種特殊情況(1)過去分詞(短語(yǔ))在句中作時(shí)間、條件、原因、讓步狀語(yǔ)時(shí)，相當(dāng)于對(duì)應(yīng)的時(shí)間、條件、原因及讓步狀語(yǔ)從句。Seen from the top of the mountain (＝When it is seen from the top of the mountain), the whole town looks more beautiful.從山頂上看，整個(gè)城市看起來更美了。Given ten more minutes (＝If we are given ten more minutes), we will finish the work perfectly.如果多給十分鐘，我們會(huì)完美地完成這項(xiàng)工作。Greatly touched by his words (＝Because she was greatly touched by his words), she was full of tears.由于被他的話深深地感動(dòng)，她滿眼淚花。Warned of the storm (＝Though they were warned of the storm), the farmers were still working on the farm.盡管被警告了風(fēng)暴的到來，但農(nóng)民們?nèi)栽谵r(nóng)場(chǎng)干活。(2)過去分詞(短語(yǔ))在句中作伴隨、方式等狀語(yǔ)時(shí)，可改為句子的并列謂語(yǔ)或改為并列分句。The teacher came into the room, followed by two students (＝and was followed by two students)．后面跟著兩個(gè)學(xué)生，老師走進(jìn)了房間。He spent the whole afternoon, accompanied by his mom(＝and was accompanied by his mom)．他由母親陪著度過了一整個(gè)下午。
新人教版高中英語(yǔ)選修2Unit 1 Science and Scientists-Learning about Language教學(xué)設(shè)計(jì)
Step 7: complete the discourse according to the grammar rules.Cholera used to be one of the most 1.__________ (fear) diseases in the world. In the early 19th century, _2_________ an outbreak of cholera hit Europe, millions of people died. But neither its cause, 3__________ its cure was understood. A British doctor, John Snow, wanted to solve the problem and he knew that cholera would not be controlled _4_________ its cause was found. In general, there were two contradictory theories 5 __________ explained how cholera spread. The first suggested that bad air caused the disease. The second was that cholera was caused by an _6_________(infect) from germs in food or water. John Snow thought that the second theory was correct but he needed proof. So when another outbreak of cholera hit London in 1854, he began to investigate. Later, with all the evidence he _7_________ (gather), John Snow was able to announce that the pump water carried cholera germs. Therefore, he had the handle of the pump _8_________ (remove) so that it couldn't be used. Through his intervention，the disease was stopped in its tracks. What is more, John Snow found that some companies sold water from the River Thames that __9__________________ (pollute) by raw waste. The people who drank this water were much more likely _10_________ (get) cholera than those who drank pure or boiled water. Through John Snow's efforts, the _11_________ (threaten) of cholera around the world saw a substantial increase. Keys： 1.feared 2.when 3. nor 4.unless 5.that/which 6.infection 7.had gathered 8.removed 9.was polluted 10.to get 11. threat
新人教版高中英語(yǔ)選修2Unit 1 Science and Scientists-Reading and thinking教學(xué)設(shè)計(jì)
Step 5： After learning the text, discuss with your peers about the following questions:1.John Snow believed Idea 2 was right. How did he finally prove it?2. Do you think John Snow would have solved this problem without the map?3. Cholera is a 19th century disease. What disease do you think is similar to cholera today?SARS and Covid-19 because they are both deadly and fatally infectious, have an unknown cause and need serious public health care to solve them urgently.keys:1. John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water.2. No. The map helped John Snow organize his ideas. He was able to identify those households that had had many deaths and check their water-drinking habits. He identified those houses that had had no deaths and surveyed their drinking habits. The evidence clearly pointed to the polluted water being the cause.3. SARS and Covid-19 because they are both deadly and fatally infectious, have an unknown cause and need serious public health care to solve them urgently.Step 6: Consolidate what you have learned by filling in the blanks:John Snow was a well-known _1___ in London in the _2__ century. He wanted to find the _3_____ of cholera in order to help people ___4_____ it. In 1854 when a cholera __5__ London, he began to gather information. He ___6__ on a map ___7___ all the dead people had lived and he found that many people who had ___8____ (drink) the dirty water from the __9____ died. So he decided that the polluted water ___10____ cholera. He suggested that the ___11__ of all water supplies should be _12______ and new methods of dealing with ____13___ water be found. Finally, “King Cholera” was __14_____.Keys: 1. doctor 2. 19th 3.cause 4.infected with 5.hit 6.marked 7.where 8.drunk 9.pump 10.carried 11.source 12.examined 13.polluted 14.defeatedHomework: Retell the text after class and preview its language points
新人教版高中英語(yǔ)選修2Unit 1 Science and Scientists-Using langauge教學(xué)設(shè)計(jì)
This happens because the dish soap molecules have a strong negative charge, and the milk molecules have a strong positive charge. Like magnets, these molecules are attracted to each other, and so they appear to move around on the plate, taking the food coloring with them, making it look like the colors are quickly moving to escape from the soap.Listening text:? Judy: Oh, I'm so sorry that you were ill and couldn't come with us on our field trip. How are you feeling now? Better?? Bill: Much better, thanks. But how was it?? Judy: Wonderful! I especially liked an area of the museum called Light Games.it was really cool. They had a hall of mirrors where I could see myself reflected thousands of times!? Bill: A hall of mirrors can be a lot of fun. What else did they have?? Judy: Well, they had an experiment where we looked at a blue screen for a while, and then suddenly we could see tiny bright lights moving around on it. You'll never guess what those bright lights were!? Bill: Come on, tell me!? Judy: They were our own blood cells. For some reason, our eyes play tricks on us when we look at a blue screen, and we can see our own blood cells moving around like little lights! But there was another thing I liked better. I stood in front of a white light, and it cast different shadows of me in every color of the rainbow!? Bill: Oh, I wish I had been there. Tell me more!? Judy: Well, they had another area for sound. They had a giant piano keyboard that you could use your feet to play. But then, instead of playing the sounds of a piano, it played the voices of classical singers! Then they had a giant dish, and when you spoke into it, it reflected the sound back and made it louder. You could use it to speak in a whisper to someone 17 meters away.? Bill: It all sounds so cool. I wish I could have gone with you? Judy: I know, but we can go together this weekend. I'd love to go there again!? Bill: That sounds like a great idea!
新人教版高中英語(yǔ)選修2Unit 2 Bridging Cultures-Discovering useful structures教學(xué)設(shè)計(jì)
The grammar of this unit is designed to review noun clauses. Sentences that use nouns in a sentence are called noun clauses. Nominal clauses can act as subject, object, predicate, appositive and other components in compound sentences. According to the above-mentioned different grammatical functions, nominal clauses are divided into subject clause, object clause, predicate clause and appositive clause. In this unit, we will review the three kinds of nominal clauses. Appositive clauses are not required to be mastered in the optional compulsory stage, so they are not involved.1. Guide the students to judge the compound sentences and determine the composition of the clauses in the sentence.2. Instruct students to try to learn grammar by generalizing grammar rules, controlling written practice, and semi-open oral output.3. Inspire the students to systematize the function and usage of noun clause1.Instruct students to try to learn grammar by generalizing grammar rules, controlling written practice, and semi-open oral output.2.Inspire the students to systematize the function and usage of noun clauseStep1: The teacher ask studetns to find out more nominal clauses from the reading passage and udnerline the nominal clauses.
新人教版高中英語(yǔ)選修2Unit 5 First Aid-Discovering useful structures教學(xué)設(shè)計(jì)
You have no excuse for not going.你沒有理由不去。He was punished for not having finished his homework.他因未完成作業(yè)而受到懲罰。2．動(dòng)詞ing形式復(fù)合結(jié)構(gòu)由物主代詞或人稱代詞賓格、名詞所有格或普通格加動(dòng)詞ing，即“sb./sb.'s＋doing”構(gòu)成。動(dòng)詞ing形式的復(fù)合結(jié)構(gòu)實(shí)際上是給動(dòng)詞ing形式加了一個(gè)邏輯主語(yǔ)。動(dòng)詞ing形式的復(fù)合結(jié)構(gòu)有四種形式：①形容詞性物主代詞＋動(dòng)詞ing②名詞所有格＋動(dòng)詞ing③代詞賓格＋動(dòng)詞ing④名詞＋動(dòng)詞ingHer coming to help encouraged all of us.她來幫忙鼓舞了我們所有人。The baby was made awake by the door suddenly shutting.這個(gè)嬰兒被突然的關(guān)門聲吵醒了。Can you imagine him/Jack cooking at home?你能想象他/杰克在家做飯的樣子嗎？無生命名詞無論是作主語(yǔ)還是作賓語(yǔ)都不能用第②種形式。Tom's winning first prize last year impressed me a lot.湯姆去年得了一等獎(jiǎng)使我印象深刻。Do you mind my/me/Jack's/Jack leaving now?你介意我/杰克現(xiàn)在離開嗎？Excuse me for my not coming on time．很抱歉我沒能按時(shí)來。His father's being ill made him worried.他父親病了，他很擔(dān)心。We are looking forward to the singer's/the singer to give us a concert.我們盼望著這位歌手來給我們舉辦一場(chǎng)演唱會(huì)。
高教版中職數(shù)學(xué)基礎(chǔ)模塊下冊(cè)：6.3《等比數(shù)列》教學(xué)設(shè)計(jì)
課題序號(hào)6-3授課形式講授與練習(xí)課題名稱等比數(shù)列課時(shí)2教學(xué) 目標(biāo)知識(shí) 目標(biāo)理解并掌握等比數(shù)列的概念，掌握并能應(yīng)用等比數(shù)列的通項(xiàng)公式及前n項(xiàng)和公式。能力 目標(biāo)通過公式的推導(dǎo)和應(yīng)用，使學(xué)生體會(huì)從特殊到一般，再?gòu)囊话愕教厥獾乃季S規(guī)律，初步形成認(rèn)識(shí)問題、分析問題、解決問題的一般思路和方法 。素質(zhì) 目標(biāo)通過對(duì)等比數(shù)列知識(shí)的學(xué)習(xí)，培養(yǎng)學(xué)生細(xì)心觀察、認(rèn)真分析、正確總結(jié)的科學(xué)思維習(xí)慣和嚴(yán)謹(jǐn)?shù)膶W(xué)習(xí)態(tài)度。教學(xué) 重點(diǎn)等比數(shù)列的概念及通項(xiàng)公式、前n項(xiàng)和公式的推導(dǎo)過程及運(yùn)用。教學(xué) 難點(diǎn)對(duì)等比數(shù)列的通項(xiàng)公式與求和公式變式運(yùn)用。教學(xué)內(nèi)容 調(diào)整無學(xué)生知識(shí)與 能力準(zhǔn)備數(shù)列的概念課后拓展 練習(xí) 習(xí)題（P.21）： 3，4．教學(xué) 反思 教研室 審核
高教版中職數(shù)學(xué)基礎(chǔ)模塊下冊(cè)：8.2《直線的方程》教學(xué)設(shè)計(jì)
課程名稱數(shù)學(xué)課題名稱8．2 直線的方程課時(shí)2授課日期2016.3任課教師劉娜目標(biāo)群體14級(jí)五高班教學(xué)環(huán)境教室學(xué)習(xí)目標(biāo)知識(shí)目標(biāo)： （1）理解直線的傾角、斜率的概念； （2）掌握直線的傾角、斜率的計(jì)算方法． 職業(yè)通用能力目標(biāo)： 正確分析問題的能力 制造業(yè)通用能力目標(biāo)： 正確分析問題的能力學(xué)習(xí)重點(diǎn)直線的斜率公式的應(yīng)用．學(xué)習(xí)難點(diǎn)直線的斜率概念和公式的理解．教法、學(xué)法講授、分析、討論、引導(dǎo)、提問教學(xué)媒體黑板、粉筆