【文章內(nèi)容簡(jiǎn)介】 們的孫子和孫女能有多少呢？一共可以有1512只。這是第三代。不要忘了，40天以后，第三代的第一胎共36對(duì)也開(kāi)始繁殖了，它們的第一胎就可以生432只，一共可生5胎，為2160只。還有第三代的第二胎到第七胎呢，所以第四代一生可以生出6480只小老鼠。照這樣推算下去，第五代為25920只，第六代為93312只，第七代為279936只，第八代，也就是這一年的最后一批為559872只。你看看，從三月份的2只，到八月底九月初就會(huì)變成967118只的龐大隊(duì)伍！就是由于氣候、疾病和天敵的消耗等原因中途死掉一半，也還有50萬(wàn)只！天哪，這簡(jiǎn)直像是一個(gè)天文數(shù)字！”他把推算的結(jié)果擺在我的面前，用手指著那些數(shù)字說(shuō)。我遲疑地接過(guò)他的本子，看著那密密麻麻的數(shù)字，內(nèi)心深表懷疑。于是自己動(dòng)手，重新推算了一遍，所得的結(jié)果竟然和他的完全一致?！笆堑?，”我喃喃地說(shuō)，“這實(shí)在是一個(gè)可怕的數(shù)字?！薄罢?yàn)槿绱?，所以，在如此廣闊的北極草原上，有時(shí)候，它們的密度竟能達(dá)到每公頃有250只之多！這還只是旅鼠的第一大奧秘?！笨粗殷@訝的表情，他顯得有點(diǎn)得意。所選文段介紹了北極旅鼠的什么特點(diǎn)？作者是怎樣把這一特點(diǎn)說(shuō)清楚的？除了這一特點(diǎn)，文章中還介紹了北極旅鼠的哪些特點(diǎn)？：“人類(lèi)也許應(yīng)該從旅鼠身上學(xué)到點(diǎn)什么。例如，如果人類(lèi)也毫無(wú)節(jié)制地繁衍下去，也許有一天不得不走旅鼠的道路?！蹦阏J(rèn)為這樣說(shuō)對(duì)嗎？談?wù)劺碛?。五、達(dá)標(biāo)測(cè)試1．選出既沒(méi)有讀音錯(cuò)誤又沒(méi)有書(shū)寫(xiě)錯(cuò)誤的一項(xiàng) ．．．（．）A．嚙齒（li232。）盜聽(tīng)途說(shuō) 繁衍 B．媲美（p236。）鼠目寸光 滑稽（jī）．C．挑釁（x249。n）篤信（dǔ）遷徒2．這是一篇很別致的科學(xué)小品，采用了_____________框架，_____________的方式，生動(dòng)有趣地介紹了有關(guān)_____________的知識(shí)。把它看作記敘文，因?yàn)樗邆溆洈⒌牧兀磿r(shí)間_____________，地點(diǎn)_____________，人物_____________，事情的起因_____________，經(jīng)過(guò)_____________，結(jié)果_____________。3．根據(jù)課文內(nèi)容填空。它_____________了半天，找不到一個(gè)洞口可_____________，我急中生智，_____________下帽子把它_____________住了。當(dāng)我小心翼翼地把它從帽子里_____________出來(lái)時(shí)，突然來(lái)了一個(gè)高個(gè)子的白人，他饒有興趣地_____________著我，笑瞇瞇地問(wèn)道：“你_____________到了什么好東西？” 。“幸好它們只是一些小老鼠，……幾乎所有的旅鼠一下子都變得焦躁不安起來(lái)，它們______，_______，_______，______，似乎大難臨頭世界末日就要到來(lái)似的?！蝗ゴ罅糠敝常痪涂梢员苊膺@種悲劇!（1）“我深深地吸了一口氣”是因?yàn)椋海?）第三段“我卻怎么也笑不出”是因?yàn)椋海?）填入第二段中畫(huà)橫線處的短語(yǔ)，正確的排列順序是________________。A．停止進(jìn)食B．永無(wú)休止C．東跑西顛D．吵吵嚷嚷（4）．認(rèn)真閱讀文段，概括旅鼠繁殖的特點(diǎn)。（5）．旅鼠的數(shù)量達(dá)到一定密度時(shí)，會(huì)出現(xiàn)一種什么奇怪現(xiàn)象?最終達(dá)到一個(gè)什么目的?（6）、將下列句子的成分用符號(hào)標(biāo)出來(lái)。A．你真認(rèn)為我會(huì)像旅鼠那樣不顧一切地跳下去嗎? Ｂ．我一把揪住了他的背包帶。第三篇：八年級(jí)英語(yǔ)下冊(cè)Unit4導(dǎo)學(xué)案（精選）龍王鄉(xiāng)初級(jí)中學(xué)導(dǎo)學(xué)案科目：八年級(jí)英語(yǔ) 班級(jí)：總課時(shí)：時(shí)間：Unit4SectionA1a—2c學(xué)習(xí)目標(biāo): ，掌握mad, anymore等詞的拼寫(xiě)，固定搭配及用法；學(xué)習(xí)方法：導(dǎo)學(xué)法、任務(wù)型教學(xué)學(xué)習(xí)內(nèi)容：Report what someone : 憤怒的______ 再也（不）______直接引語(yǔ)___________間接引語(yǔ)___________把…帶到?___________ 句子： 說(shuō)她正準(zhǔn)備在周五晚上為L(zhǎng)ana舉辦一次驚喜聚會(huì)。______________________________________________________________________________________ 2我對(duì)John非常惱火____________________________________________________________________ 3他說(shuō)他能說(shuō)三種語(yǔ)言___________________________________________________________________ 4我將帶一些飲料和小吃去你家___________________________________________________________ 5 Lily說(shuō)不再生Ben的氣了_______________________________________________________________ Step2：課堂互動(dòng)探究:直接引語(yǔ)，間接引語(yǔ)。觀察下面句子，總結(jié)用法“ I like English,” Jim says.(直接引語(yǔ)) says(that)he likes English.(間接引語(yǔ)) said to me,“ I will fly to the moon”(直接引語(yǔ)) told me(that)he would fly to the moon.(間接引語(yǔ))5.“We are listening to the radio now.” The teacher said.(直接引語(yǔ)) teacher said they were listening to the radio then.(間接引語(yǔ))總結(jié):___________________________________________________________________________。運(yùn)用:選詞填空: told me that she _______(will, would)visit China the next ’s English teacher said that she ________(is ,was)a good said that he ________(is, was)born in said that she _______(can, could)speak four said that he _______(go, went)to the beach every :聽(tīng)力練習(xí)1b,2a,2b作業(yè)設(shè)計(jì)A用詞的適當(dāng)形式填空: said he _____________(can)dance and sing said she _________________(eat)some junk food at that time teacher told me the earth ______________(go)around the I was young, my parents told me ___________________(not play)in the .” I want to have a rest.” Jim says ___________________________________6.“ You can play tennis with us next Sunday.” Lily said to told Ben ____________________________________ said,” I’m looking for my new dictionary.”She said______________________________________________________ told my mother, “ There is only one sun in the sky.”I told my mother________________________________總結(jié)與反思：科目：八年級(jí)英語(yǔ) 班級(jí)：總課時(shí)：時(shí)間：Unit4 SectionA3a—4第二課時(shí)學(xué)習(xí)目標(biāo): 掌握單詞first of all, message,pass on, be supposed to ；: 能把直接引語(yǔ)變成間接引語(yǔ)學(xué)習(xí)方法：導(dǎo)學(xué)法、任務(wù)型教學(xué)學(xué)習(xí)內(nèi)容：Report what someone 消息_________假定_________首先___________傳遞__________被期望或被要求??_____________ 把答案?jìng)鹘o她_________________________做作業(yè)_____________________________句子：1Mary借了你的筆并且沒(méi)有還____________________________________2你本該今天早上去公共汽車(chē)站___________________________________3Ben傳來(lái)了信兒，接著你把答復(fù)傳給John_________________________________4我們經(jīng)常在周五下午開(kāi)會(huì)_________________________________________Step2：課堂互動(dòng)探究3a作業(yè)設(shè)計(jì)A句意填詞： for lending me your umbrella, and I’ll r___________ it and Lucy are doing their homework p_________ read the note and then pass it mother asked me to take a m_____________ for ’re not _____________(suppose)to smoke in .() _______ her friend that her parents were going to have a party for () hasn’t been late for school _______ from then more()’re surprised ____ the hear() were supposed _______ at the bus stop this () told Lana that Marcia _______ a surprise party for going to going to go to have() told him Uncle Wang _______ the TV set for mend() policeman asked the little boy did he does he he he lives() hope you’re in health healthy() more exercise you take, the ________ you will () am better _______ reading and ()’s mother said to him will be back in an would be back in an hour is back in an came back in an hour() science teacher said the earth _________ around the going總結(jié)與反思：科目：八年級(jí)英語(yǔ) 班級(jí)：總課時(shí)：時(shí)間：Unit4 SectionB P29學(xué)習(xí)目標(biāo): 和兩個(gè)短語(yǔ)be good at /do well in。學(xué)習(xí)重點(diǎn): 用英語(yǔ)進(jìn)行自我評(píng)價(jià)。學(xué)習(xí)方法：導(dǎo)學(xué)法、任務(wù)型教學(xué)學(xué)習(xí)內(nèi)容：Report what someone 努力工作的________________在某方面做得好______________能做的更好______________