人教版六年级数学下册教案(表格式)(编辑修改稿)

人教版六年级数学下册教案(表格式)(编辑修改稿)内容摘要：

es and aci ds i nto the oceans and seas. Thi s produced a chai n reacti on, whi ch m ade i t possi ble for l i fe to devel op. Many mi l i ons of years l ater, the fi rst extrem el y sm al pl ants began to appear on the surface of the water. They mul ti pli ed and fil l ed the oceans and seas with oxygen, whi ch encouraged the l ater devel opm ent of earl y shel fi sh and al l sorts of fi sh. N ext, green pl ants began to grow on l and. They were fol lowed i n tim e by land anim als. Some were i nsects. O thers, cal l ed am phi bi ans, were abl e to l ive on l and as wel l as i n the water. Later when the pl ants grew i nto forests, repti l es appeared for the fi rst ti me. They produced young general y by l ayi ng eggs. After that, som e huge ani mal s, cal ed di nosaurs, devel oped. They l ai d eggs too and exi sted on the earth for m ore than 140 mi l ion years. H owever, 65 mi li on years ago the age of the dinosaurs ended. Why they suddenl y di sappeared stil l rem ai ns a m ystery. This di sappearance made possi bl e thi ef ri se of m am m als on the earth. These ani mals were different from al l ife forms in the past, because they Gavi n bi rth to young baby animal s and prodeced mi lk to feed them. Finnal y about mi l ion years ago some sm al celver anim als, now wi th hands and feet, appeared and spread al l over the earth. Thus they have, in thei r turn, be e the m ost i m portant ani m al s on the pl a. But they no they l ooki ng after the earth very wel l . They are putti ng too m uch carbon di oxi de i nto the atm osphere, whi ch prevenrs heat from escapi ng from the earth i nto space. As a resul t of thi s, m any sci enti sts bel i eve the earth m ay b e too hot to l i ve on. So whether l i fe wi l l conti nue on the earth for m i l l i ons of years to e wi l l depend on whether thi s probl em can be sol ved. A vi si t to the m oon Last m onth I was l ucky engough to havesumm er of 1903. Two ol d and weal thy brothers, Roderi ck an dOl i ver, have m ade a bet. O li ver bel i eves that wi th a m il li on pound bank note a m an coul d survi ve a m onth i n London. H i s brother Roderi ck doubts i t. At this m om ent, they see a penni l es young m an wanderi ng on the pavem ent outsi de thei r house. It i s H enry Adam s, an Am erican busi nessm an, who i s l ost i n London and does not know what he shoul d do. Roderi ck: Young m an, woul d you step insi de a m om ent, pl ease? H enry: Who? Me, si r? Roderi ck: Yes, you. O li ver: Through the front door on your l eft. H enry: ( A servant opens a door) Thanks. Servant: Good m orni ng, si r. Woul d you pl ease e i n? Permi t m e to l ead the way, si r. O li ver: （ H enry enters） Thank you, James. That wil l be al l. Roderick: How do you do, Mr…er…? H enry: Adam s. H enry Adam s. O li ver: Com e and sit down, Mr Adam s. H enry: Thank you. Roderi ck: You are an Am eri can? H enry: That’ s right, from San Francisco. Roderi ck: H ow wel l do you know London? H enry: Not at al l, i t’s m y fi rst tri p here. Roderi ck: I wonder, Mr Adam s, i f you’d m i nd US aski ng a few questions. H enry: N ot at al. Go ri ght ahead. Roderi ck: May we ask what you’re doi ng i n thi s country and what your plans are? H enry: Wel l, I can’t say that I have any pl ans. I’m hoping to fi nd work. As a m atter of fact, I l anded i n Britai n by acci dent. Ol i ver: H ow is that possi bl e? H enry: Wel l, you see, back hom e I had m y own boat. About a m onth ago, I was sai li ng out of the bay… ( hi s eyes stare at what i s l eft of the brother’s di nner on tabl e. ) O li ver: Wel , go on. Henry: O h, yes. Wel , towards ni ghtfal I found myself carri ed out to sea by a strong wi nd. It was al m y faul t. It di dn39。 t know whether I coul d survi ve unti l morning. The next m orni ng I’d just about gi ven m ysel f up for l sot when I was spoted by a ship. Ol iver: And i t was the shi p that brought you to Engl and. H enry: Yes. The fact i s that I earned m y passage by working as an unpai d hand, whi ch accounts for m y appearance. I went to the Am eri can em bassy to seek hel p, but … ( The brothers smi l e at each other. ) Roderi ck: Wel l, you m ustn’t worry about that. It’s an advantage. H enry: I’m afrai d I don’t qui te fol l ow you, si r. Roderi ck: Tel l us, Mr Adam s, what sort of work di d you do i n Am eri ca. H enry: I worked for a mi ni ng apany. Coul d you offer m e som e ki ne of work here? Roderi ck: Pati ence, Mr Adam s. If you don39。 t m ind, m ay I ask you how m uch m oney you have? H enry: Wel, to be honest, I have none. Ol i ver: (happil y) What l uck! Brother, what l uck! (claps hi s hands together) Henry: Wel l, i t may sem l ucky to you but not to me! O n the contrary, i n fact. If thi s i s you i dea of some knd of joke, I don’t think i t’s very funny. ( H enry stands up to l eave) Now if you’l l excuse m e, I thi nk I’l l be on m y way. Roderi ck: Pl ease don’t go, Mr Adam s. You m ustn’t think we don’t care about you. O li ver, gi ve hi m the l etter. O li ver: Yes, the l etter. (gets it from a desk and gi ves i t to H enry l i ke a gift ) The l etter. H enry: (taki ng it careful l y) For m e? Roderick: For you. (H enry starts to open i t) O h, no, you m ustn’t open it. N ot yet. You can’t open i t unti l two o’cl ock. Henry: O h, thi s i s sil y. Roderi ck: N ot si l y. There’s m oney i n it (cal s to the servant) Jam es ? H enry: O h, no. I don’t want your chari ty. I just want an honest job. Roderi ck: We know you’re hardworki ng. That39。 s why we’ve gi ven you the l etter. Jam es, show Mr Adams out. Henry: Wel , why don’t you expl ain what thi s i s al about? Roderi ck: You’l l soon know. (l ooks at the cl ock) In exactl y an hour and a hal f. Servant: This way, si r. Roderick: Mr Adam s, not until 2 o’cl ock. Prom ise? H enry: Prom ise. Goodbye. Act I, Scene 4 ( O utsi de a restaurant H enry l oks at the。