unit10课件
日期:2010-08-21 08:32
大规模火山爆发说,恐龙还是统治地球的霸主,其他许多动物种群同时灭绝的原因,恐龙灭亡之谜,如陨石撞击地球说,Unit10Whenwasitbuilt?Lesson38Whatdoyouknowaboutdinosaurs?恐龙灭亡之谜大约一直到七千万年前,来解释这灭亡之谜,疾病说或食物中毒说等,但任何解释恐龙灭绝的理论,而且,必须能解释当时除恐龙外,为什么会发生这种情形,科学家曾提出各种不同理论,至今科学家仍在继续研究中,它们全部绝灭了,至今仍是一个谜,然而在此后不到五百万年之间—也就是六千五百万年前,整个灭绝过程还很可能是在仅仅数月内发生的,fossilsTheMuseumofNationalHistoryReadandanswer1Whichmuseumdidthestudentsvisit?2Wheredidtheygofirst?3Wherewerethedinosaureggsfound?4Whenweretheeggslaid?5Howlongdiddinosaursliveontheearth?6Whendiddinosaursdisappear?7Wherewasthespecialdinosaurondisplaydiscovered?8Whywasitspecial?9Whatdidthespecialdinosaurlooklike?10Whatdosomescientiststhinkaboutthedisappearanceofdinosaurs?Whichmuseumdidthestudentsvisit?2Wheredidtheygofirst?3Wherewerethedinosaureggsfound?4Whenweretheeggslaid?5Howlongdiddinosaursliveontheearth?TheyvisitedtheMuseumofNationalHistoryTheywenttotheUndergroundDinosaurWorldfirstTheywerefoundintheGobiDesertTheywerelaidabout95millionyearsagoTheylivedontheearthfor,
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