0906G——阅读真题 回忆&讨论 汇总贴 （请勿开新帖）（2楼已更新）

kk002UID: 2610827

40# mutah CDBC

jjs1986UID: 2478040

133# snow_125



cbdc 同意

dearmapleUID: 2568332

我也觉得是CBDC

dearmapleUID: 2568332

是successive的说

OdinnyUID: 2610439

35# lanehaibara
您幼稚了吧……那张卷子上貌似是有一个签名的好吧，撕了您不用负责了吗？？

davisduckseven7UID: 2439958

我恨死监考了……抓跨区特严……没跨成……大阅答得不好

dearmapleUID: 2568332

为什么大家老是拍蚊子那篇啊？？ 那个文学作品好难，有没有系统一点的答案啊？

hengwayUID: 2651259

professional。。。。。。

GenevUID: 2543794

总结了Venus那篇的回忆如下：

关键词：
Venus tectonics  terrestrial Magellan lava temperature crust ductile pliant aphrodite ishtar highland periodicity thinning
以后多弄点关键词回来，有可能在网上找到原文。。。

相关资料：
了解点背景知识也好。。。
http://history.nasa.gov/JPL-400-345/text.htm

http://www.tufts.edu/as/astronomy/LangChap4a.html

http://articles.adsabs.harvard.e ... IEW&classic=YES


The global tectonics of Venus differs significantly from that of Earth, most markedly in that the surface is covered predominately by gently rolling terrain; there apparently are no features like ocean rises; the gravity is positively correlated with topography at all wavelengths; and the few highlands are estimated to be supported or compensated at a depth of approximately 100 kilometers. The surface of Venus appears to be covered mainly by an ancient crust, the high surface temperature making subduction difficult. It seems likely that well over 1 billion years ago water was destabilized at the surface and, soon after, plate tectonics ceased. The highlands appear to be actively supported, presumably as manifestations of long-enduring hot spots.

[edit] Venus
See also: Geology of Venus
Venus shows no evidence of active plate tectonics. There is debatable evidence of active tectonics in the planet's distant past; however, events taking place since then (such as the plausible and generally accepted hypothesis that the Venusian lithosphere has thickened greatly over the course of several hundred million years) has made constraining the course of its geologic record difficult. However, the numerous well-preserved impact craters have been utilized as a dating method to approximately date the Venusian surface (since there are thus far no known samples of Venusian rock to be dated by more reliable methods). Dates derived are the dominantly in the range ~500 to 750 Ma, although ages of up to ~1.2 Ga have been calculated. This research has led to the fairly well accepted hypothesis that Venus has undergone an essentially complete volcanic resurfacing at least once in its distant past, with the last event taking place approximately within the range of estimated surface ages. While the mechanism of such an impressionable thermal event remains a debated issue in Venusian geosciences, some scientists are advocates of processes involving plate motion to some extent.
One explanation for Venus' lack of plate tectonics is that on Venus temperatures are too high for significant water to be present.[31][32] The Earth's crust is soaked with water, and water plays an important role in the development of shear zones. Plate tectonics requires weak surfaces in the crust along which crustal slices can move, and it may well be that such weakening never took place on Venus because of the absence of water. However, some researchers remain convinced that plate tectonics is or was once active on this planet.

Tectonic activity
Despite the fact that Venus appears to have no tectonic plates as such, the planet's surface shows various features usually associated with tectonic activity. Features such as faults, folds, volcanoes, large mountains and rift valleys are caused on Earth by plates moving over the planet's molten interior.
The active volcanism of Venus has generated chains of folded mountains, rift valleys, and terrain known as tesserae, a word meaning "floor tiles" in Greek. Tesserae exhibit the effects of eons of compression and tensional deformation.
Unlike those on Earth, the deformations on Venus are directly related to the dynamic forces within the planet's mantle. Gravitational studies suggest that Venus lacks an asthenosphere—a layer of lower viscosity that facilitates the movement of tectonic plates. The absence of this layer suggests that the deformation of Venus' surface can be explained by convective movements within the planet.
The tectonic deformations on Venus occur on a variety of scales, the smallest of which are related to linear fractures or faults. In many areas these faults appear as networks of parallel lines. Small, discontinuous mountain crests are found which resemble those on the Moon and Mars. The effects of extensive tectonism are shown by the presence of normal faults, where the crust has sunk in one area relative to the surrounding rock, and superficial fractures. Radar imaging shows that these types of deformation are concentrated in belts located in the equatorial zones and at high southern latitudes. These belts are hundreds of kilometres wide and they appear to interconnect across the whole of the planet, forming a global network associated with the distribution of volcanoes.
The rifts of Venus, formed by the expansion of the lithosphere, are groups of depressions tens to hundreds of metres wide and extending up to 1,000 kilometres in length. The rifts are mostly associated with large volcanic elevations in the form of domes, such as those at Beta Regio, Atla Regio and the western part of Eistla Regio. These highlands seem to be the result of enormous mantle plumes (rising currents of magma) which have caused elevation, fracturing, faulting, and volcanism.
The highest mountain chain on Venus, Maxwell Montes in Ishtar Terra, was formed by a process of compression, expansion, and lateral movements. Another type of geographical feature, found in the lowlands, consists of ridge belts elevated several kilometres above the surface, hundreds of kilometres wide and thousands long. Two major concentrations of these belts exist: one in Lavinia Planitia near the southern pole, and the second adjacent to Atalanta Planitia near the northern pole.
Tesserae are found mainly in Aphrodite Terra, Alpha Regio, Tellus Regio and the eastern part of Ishtar Terra (Fortuna Tessera). These regions contain the superimposition and intersection of grabens of different geological units, indicating that these are the oldest parts of the planet. It was once thought that the tesserae were continents associated with tectonic plates like those of the Earth; in reality they are probably the result of floods of basaltic lava forming large plains, which were then subjected to intense tectonic fracturing.[2]

GenevUID: 2543794

各位网友的回忆总结：

金星那个首先文章主旨题我选的是金星与地球的对比什么的。
然后一题是第三段提出那两座大高山的作用是反驳第二段的那种解释方法。
第三题金星地球的地震不同的地方是地球的宽金星的窄~大概是这样吧……还是金星的宽地球的窄我忘了~反正就是这么一个选项~~
第四题是温度不同导致的~~
第五题是succesive的thinning过程会形成那两座大高山，我觉得这题是直接重复………
然后一题是第三段的作用是提出了一个和其他人都不同的观点
第七题忘了………………

金星那个首先文章主旨题我选的是金星与地球的对比什么的。
然后一题是第三段提出那两座大高山的作用是反驳第二段的那种解释方法。
第三题金星地球的地震不同的地方是地球的宽金星的窄~大概是这样吧……还是金星的宽地球的窄我忘了~反正就是这么一个选项~~
第四题是温度不同导致的~~
第五题是succesive的thinning过程会形成那两座大高山，我觉得这题是直接重复………
然后一题是第三段的作用是提出了一个和其他人都不同的观点
第七题忘了………………

section1长阅读那几段的关系我没弄明白 我觉得应该是递进的 第一段讲板块学说 第二段在支持板块学说的条件下讲到温度的影响 第三段再讲前面两个hypothesis不能解释高山(aphrodite & ishtar)的现象 我个人认为最后讲的这个观点是建立在前面两个观点之上的 只是补充了周期性并且说这个周期很长而已

很纠结 题目里面有个问到第三段功用的 不知道该选啥……

顺便问20题大家选了啥 D是说thinning发生后那些高地就不复存在了 E是说那些高地是由板块相互作用形成的 我纠结许久选了E 但又觉得D也对 否则怎么叫thinning... 但文中貌似只说了那些山越堆越高导致下面的温度升高 进而导致火山喷发

SECTION1：长阅读是讨论金星的地貌从何而来。文章分3段，涉及到了3种不同的假说，每一个假说都有自己可以支持的证据，也有自己不能充分解释的地方。整篇文章并没有明确的提出一个“到底哪种是最好的”的观点，属于讨论性质的阅读。

section1长阅读是金星地貌（？板块学说，叫地貌也不是特贴切），第一段对比其和地球地貌差别（地球某些地貌分布集中，金星广泛分布），二三段讲两个形成地貌的假说。二段讲温度作用，地球积压成山--板块堆积之类，三段讲间歇性的某活动--就是那个熔解把地皮变软再成型之类的某地址活动--造成金星的山--好像是

4# irvine666
第一份的长阅读确定是三种假说吗？为什么我觉得是两种，所以后面题目还选了two theories 那个选项。首先说金星上也会有某种现象，但是和地球上的有不同，前者更宽泛，而后者很narrow。接着就开始讲第一种解说，大概是说地球和金星上什么距离冰层的距离不同。然后又说了一种radical理论，他用了一个例子，什么火山，指出大多数人的观点的不同，还有三个原因。实在不记得了。
长阅读讲的是金星地表形成假说。开头讲地球的大陆板块学说，指出金星地壳也有类似的形成，但与地球有不同的地方。第二段讲金星的高温和较薄的地壳使之活动更广泛，而地球的地壳厚，地下的高温活动等使几大板块碰撞形成高山和深谷。接下来讲另一个人的假说，因为前一个假说不能解释为什么金星上也有高山，举了两个例子（Aphrodite and *). 这个好像是说源于很久以前的地壳活动，间断地熔岩涌出，堆积，导致高山（不确定）。最后似乎是对两个假说的折中吧。

wuyuzhangUID: 2630602

bacd 是那篇女权文章段阅读答案？？？？？谢谢了

wuyuzhangUID: 2630602

Bacd 是非蚊子那篇的阅读答案嘛？

wuyuzhangUID: 2630602

BACD是非蚊子段阅读的答案啊？  谢谢谢谢

wuyuzhangUID: 2630602

bacd是那篇段阅读的答案吗？

ximenUID: 2528577

好人啊