[阅读] 七月到八月的狗桩, 阅读分桩(end @ 8.21 17:30)(49篇)

heavenskybird

bless all of us.

ghovik

LZ加油 我们都支持狗仔队~~~~~~~

acrophobia

喵喵喵~报喜来了~~~720~~~好开心！

zliycdr

喵喵喵~报喜来了~~~720~~~好开心！

-- by 会员 acrophobia (2010/8/12 23:28:07)

看到签名我又想起了接下去是“一人一瓶藏秘排油”
恭喜

acrophobia

喵喵喵~报喜来了~~~720~~~好开心！

-- by 会员 acrophobia (2010/8/12 23:28:07)

看到签名我又想起了接下去是“一人一瓶藏秘排油”
恭喜

-- by 会员 zliycdr (2010/8/13 0:13:41)

难道大家都不愿意当250。。。。其实你第一次给我说藏密排油我就没明白。。。。啊~罢了罢了~哈哈哈~我是欢乐的250~

acrophobia

。。。。眼花~~~缭乱。。。。逃走。。。我离250其实还很远。。。。也许这样喜欢妄下结论就是我数学永远不能满分的原因。。。。

acrophobia

补充下阅读狗, 研究用牙状况

属于长文章~本文分3段，具体结构我记不太清楚了。第一段大意就是p这种科学家常用的研究方法有问题。第二段举例大猩猩还是什么的一种灵长类，有合适的jaws和牙，且m（m打头的一个单词说的应该是臼齿吧？）化石上有磨损，磨损就说明了它们总是吃硬东西。他们的生理结构和生活习性是吻合的。最后一段说~研究发现 一种古人类（p字头吧）的牙齿和jaws结构和那猩猩是一样的~但是他们的m上就没有那么多的磨损，说明他们平时不吃硬东西啊，那为什么要进化出这样的jaw和牙呢？科学家解释说，虽然大部分时间这些古人类不用啃硬食物，在生活条件不好的时候，只有有这样的jaws和牙的个体才能得以存活，这就是为什么古人类虽然没有大猩猩的生活习性却拥有了和大猩猩结构相同的jaws和牙~v1版本的答案我遇到了，我也选择了白天视力很好但是主要在夜晚活动。
另外还有个主旨题，我选择的是，解决了一个难题。本文和golden考古版本出入挺大的。应该不是一篇。

acrophobia

《金星氢元素逃逸》 英语原版出处：Global Climate Change on Venus; New Light on the Solar System; Special Editions; by Mark A. Bullock and David H. Grinspoon
THE STUNNING DIFFERENCES between theclimates of Earth and Venus today are intimately linked to the history of wateron these two worlds. Liquid water is the intermediary in reactions of carbondioxide and surface rocks that can form minerals. In addition, water mixed intothe underlying mantle is probably responsible for the low-viscosity layer, orasthenosphere, on which Earth’s lithospheric plates slide. The formation of carbonateminerals and their subsequent descent on tectonic plates prevent carbon dioxidefrom building up. Models of planet formation predict that the two worlds shouldhave been endowed with roughly equal amounts of water, delivered by the impactof icy bodies from the outer solar system. But, when the Pioneer Venus missionwent into orbit in 1978, it measured the ratio of deuterium to ordinaryhydrogen within the water of Venus’s clouds. The ratio was an astonishing 150times the terrestrial value. The most likely explanation is that Venus once hadfar more water and lost it. When water vapor drifted into the upper atmosphere,solar ultraviolet radiation decomposed it into oxygen and either hydrogen or deuterium.Because hydrogen, being lighter, escapes to space more easily, the relativeamount of deuterium increased. Why did this process occur on Venus but not onEarth? In 1969 Andrew P. Ingersoll of the California Institute of Technologyshowed that if the solar energy available to a planet were strong enough, anywater at the surface would rapidly evaporate. The added water vapor wouldfurther heat the atmosphere and set up what he called the runaway greenhouse effect.The process would transport the bulk of the planet’s water into the upperatmosphere, where it would ultimately be decomposed and lost. Later James F.Kasting of Pennsylvania State University and his co-workers developed a moredetailed model of this effect. They estimated that the critical solar flux requiredto initiate a runaway greenhouse was about 40 percent larger than the presentflux on Earth. This value corresponds roughly to the solar flux expected at theorbit of Venus shortly after it was formed, when the sun was 30 percent fainter.An Earth ocean’s worth of water could have fled Venus in the first 30 millionyears of its existence. A shortcoming of this model is that if Venus had athick carbon dioxide atmosphere early on, as it does now, it would haveretained much of its water. The amount of water that is lost depends on howmuch of it can rise high enough to be decomposed—which is less for a planetwith a thick atmosphere. Furthermore, any clouds that developed during theprocess would have reflected sunlight back into space and shut off the runawaygreenhouse. So Kasting’s group also considered a solar flux slightly below thecritical value. In this scenario, Venus had hot oceans and a humidstratosphere. The seas kept levels of carbon dioxide low by dissolving the gasand promoting carbonate formation. With lubrication from water in theasthenosphere, plate tectonics might have operated. In short, Venus possessed climate-stabilizingmechanisms similar to those on Earth today. But the atmosphere’s lower densitycould not prevent water from diffusing to high altitudes. Over 600 millionyears, an ocean’s worth of water vanished. Any plate tectonics shut down,leaving volcanism and heat conduction as the interior’s ways to cool.Thereafter carbon dioxide accumulated in the air.
This picture, termed the moistgreenhouse, illustrates the intricate interaction of solar, climate andgeologic change. Atmospheric and surface processes can preserve the status quo,or they can conspire in their own destruction. If the theory is right, Venusonce had oceans—perhaps even life, although it may be impossible to know.

gitarrelieber 同学提供！ 金星氢元素逃逸一文看懂这个足矣！

zliycdr

楼上这个已经在Background内了

IvyDC

请教楼主，那个background的资料应该怎么用，是浏览下知道大概内容，还是要好好分析下，揣测下出题点什么的？


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话说刚才被您老顶上去的换题库大标题吓的真是够呛呀~~~