Speed Time1(1:50)次奥 走神了~~~~~一读科技文就走神........还想当爱因斯坦呢 哼 做梦! In modern history ,the significant phenomena is the demographic transition. The reason why it happens is obscure that by Homo sapiens to abundance looks biologically bonkers. according to circumstances, people switch between two reproductive strategies-from r-selection to k-selection. Time2(1:30) In order to prove the above conclusion,Dr.G has did an experiment.From that,he has got the imformation that family size reduced ,the more socially successful families tends to feed back on itself over the generations,and the contribution of the K-selected to the gene pool therefore shrinks. (还是不太懂最后一句话) 先做到这里 上课去~~
Speed: 1.[308]2’35 Population transition from r-type to k-type, that is, the richer, the smaller family. 2.[255]1’47 K-type generations are not actually succeed r-type generations because gene pool shrinks. 3.[357]2’56 Social circumstance diminished the disadvantages of r-type A new type of sponge in deep sea was discovered and they eat small fish rather than absorb bacteria. 4.[260]1’58 Several evidences reveal that the new sponge is a kind of carnivorous species. 5.[226]1’44 Features of sponge and its surrounding environment. Obstacle:[1062]8’13 Main Idea: Two scientists created four demension effects Author's attitude: neutral but point out that the model has some weak points Article structure: 1-7) The introduction of two scientists and the puzzle, the main principle called radial projection. 8-11) The origin and process of the puzzle. It’s fun. 12-13) The application of the puzzle, but there are some weak points to apply.
l楼主辛苦~~~~ 科教文是偶的软肋啊，要下工夫克服~~~ 1’49 Demographic transition that people get richer, they have smaller family. 1’52 Some people involved in the experiment to test the idea above. If it is correct, it will show that the generation succeed one another. 2’35 前一篇文章的没读懂。 JV find a new species of sponge in the deep sea. 1’36 Researchers could describe their lives, such as reproduce, cleaning and appetites. 1’06 Harp sponge can catch much prey?????
越障下班回去做~~~~~~~~~~·
obstacle 7’05
Introduction of the 3 dimensional puzzle that S&S created. Explain how to created it. The puzzle is popular in lots of eara. 生词本 Sphere 球体 Radical projection放射投影 Stereographic projection 球面投影，极射赤面投影 Intersect 相交，交叉 Convex 凸面的；concave 凹面的 Paleontology 古生物学 Imperceptible 感觉不到的，极细微的 Plausible 貌似可信的，似乎有理的 Upshot 结果，结局 Obesity 肥大，肥胖 Epidemic 流行，传染病 Child mortality 儿童死亡率
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发表于 2012-11-13 23:40:52
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