【正文】 “ 統(tǒng)計與概率 ” 領(lǐng)域的內(nèi)容分統(tǒng)計、可能性兩個部分進行復(fù)習。 “ 空間與圖形 ” 領(lǐng)域里的內(nèi)容分圖形的認識、圖形的變換、圖形的位置 三個部分進行復(fù)習。根據(jù)《標準》里具體目標的設(shè)計分類，在 “ 數(shù)與代數(shù) ”領(lǐng)域里把內(nèi)容分成數(shù)的運算、數(shù)的認識、式與方程、正比例與反比例四個部分進行復(fù)習。教材嚴格遵照《標準》的要求，精選傳統(tǒng)小學數(shù)學里有關(guān)形體的知識，增加與生活密切聯(lián)系的空間知識，讓學生在獲得必需的數(shù)學事實的過程中發(fā)展空間觀念。這個內(nèi)容安排在第三單元里，結(jié)合比例的知識進行教學。圓柱與圓錐是本冊教材的又一個重點內(nèi)容，包括圓柱和圓錐的形狀特征，圓柱的表面積及計算方法，圓柱和圓錐的體積及計算方法等知識。本冊 教材繼續(xù)教學轉(zhuǎn)化，讓學生進一步體會和應(yīng)用，通過具體的轉(zhuǎn)化活動，發(fā)展思維的靈活性。所以，轉(zhuǎn)化是重要的認知策略，也是常用的解決問題策略。在解決問題的策略里，教學轉(zhuǎn)化的思想和方法。比例的知識有比例的意義、比例的基本性質(zhì)和解比例。教學正比例和反比例，著重理解正比例的意義和反比例的意義，讓學生在現(xiàn)實的情境中作出相應(yīng)的判斷。 “ 數(shù)與代數(shù) ” 領(lǐng)域：比例的有關(guān)知識，成正比例和成反比例的量，解決問題的策略。在總復(fù)習里重點地系統(tǒng)復(fù)習小學階段教學的主要知識，在深化理解的同時組織更合理的認知結(jié)構(gòu)，通過適當?shù)木毩曅纬杀匾募寄埽瑧?yīng)用知識解決實際問題，培養(yǎng)數(shù)學素養(yǎng)。any longer. However, this reali ty al so worri ed m y desi gners. As ti me went by, I was m ade sm al er . First as a PC(personal puter)and then as a l aptop, I have been used i n offi ces and hom es si nce the 1970s. These changes onl y becam e possi bl e as m y m em ory im proved. First i t was stored in tubes,then on transistors and l ater on very sm al chi ps. As a resul tI total y changed m y shape . As I have grown ol der I have also grown sm al l er . Over tim e m y m em oryhas devel oped so m uch that , li ke an el ephant, I never frt anythi ng I have been tol d !And my memory became so large that even I couldn’t believe it!But I was always so lonely standing there by myself,until in the 1960s they gave m e a fami l y connected by a work . Iwas abl e to share m y knowl edge wi th others through the Worl d Wi de Web. Si nce the 1970s m any new appli cati ons have been found for m e . I have bee very i mportant i n m uni cati on, fi nance and trade I have al so been put i nto robots and used to m ake m obi le phones as wel l as hel p with m edical operati ons. I have even been put i nto space rockets and sent to expl ore the Moon and Mars . A nyhow, m y goal i s to provi de hum ans wi th a li fe of hi gh quali ty. I am now trul y fi l ed wi th happi ness that I am a devoted fri end and hel per of the human race ! AN DY—TH E AN DRO ID I’m part of an an android football team . About once a year we are allowed to get together to play a game of footbal. I’m as big as a human . In fact ,I look like one the fotbalteam I’m a striker so I have to be able to run very fast .My puter chips help me to mova and thi nk li ke a hum an . For exam pl e , I have l earned to si gnal to m y team m ates i n puter languages to give m e the bal when I am open and have a good shot for a goal . My fi rat footbal peti ti on was i n N agoya , Japan several years ago . Last year our team went to Seattl e , Washi ngton i n the won tsecong pl ace . Personal y , I thi nk the team that won fi rsy pl ace cheated . They had devel oped a new type of program just before the peti ti on. So we need to encourage our programer to i m prove our i ntel i gence are determi ned to create an even better system . In a way our programm et i s li ke our coach. She program s us wi th m oves to use i f a new sitati on ari ses. In thi s way I can make up new moves using my “artifical intelligence “. I would really like to play against a human team, for I have been programm ed to act just li ke them . After al l, with the hel p of m y el ectroni c brai n whi ch never fets anything ,using my intelligence is what I’m all about! TH E SPO RTIN G RO BO T My nam e is H ua Fei and I am a sporti ng robot of the 23rd century. I am an expert at hi gh flyi ng exerci ses. I jum p from spaceshi p and as I fal I turn, di ve, circl e and dance unti l I softl y l and as close as I can to the fi ni shi ng li ne. Robot peti ti ons i n the 23rd century are truly a popul ar sport. Fans from al l over Chi na watch thei r handhel d TVs when a peti ti on es on. Last tim e I l ook part i n the 78th Ol ym pi c on a fl yi ng i sl and above Brussel s i n the sky. I won the si ver medal for my perform ance . This year I had the honour to be chosen again . I wanted to mm et robots from other countyi es and expl ore i des about our ower , m y programm er fel l il l the week before we were goi ng to l eave . It was very pai nful for her and I fel t very fri ghtened. I no l onger fel t so confi dent that I woul d wi n. The day of the peti ti on was rather coul d for m y l egs and m y speci al oi l began to fteeze. I paused before I jum ped from the starting pl ace on a l i tl e spaceshi p but then I began m y perform ance. At the correct m om ent I tri ed to open m y parachute but there was a probl em . It onl y opened a l ittl e .In stead of fl yi ng softly to earth I began to fal faster and faster so that I coul d not turn , dive, ci rcl e or heart stopped beati ng as I l anded heavi l y on a m ountai n covered wi th snow. Thi s is why I am wri ti ng to you from m y hospital bed wi th two broken l egs and a fragi l e head. I di d not wi n anything at the O l ym pi c after al . I need the factory to bui l d m e two new legs and an even bigger head. Then I wil be able to pete once more . Let’s hope foe greater sucess in the next Olym pi cs! Uni t 4 (1) H ow Daisy l earned to hel p wil dli fe Dai sy had al ways longed to hel p endangered speci es of wil dli fe. O ne day she woke up and found a fl ying carpet by her bed. “Where do you want to go?”it asked. Daiasy responded immediately.“I’d like to see some endangered wildlife,”she said.“please take me to a distant land where I can find the animal that gave fur to make this sweater. ”At once the carpet flew away and took her to Tibet. There Daisy saw an antelope looking sad. It said,“We are being killed for the wool beneath our stomachs. O ur fur i s bei ng used to make sweaters for peopl e l ike you . As a reasul t, we are now an endangered species.”At that Daisy cried,“I’m sorry I didn’t know that. I wonder what is being done to help you. Flying carpet,please show m e a place where there’s some wildlife protection.” The fl yi ng carpet travel ed so fast that next mi nute they were i n Zim babwe. Dai sy turned around and found that she was bei ng watched by an elephant.“H ave you e