gwd7-Q22 to Q25

fchn951

这篇文章的后面讲的plume这个理论，好像在某一道逻辑题中有类似的理论。好像是从东向西移动，会生成一系列的火山带。。。

yukon

25题支持A

Because of its proximity to Earth’s core, the rock at the base of the mantle is much hotter than   rock in the upper mantle.  

不能因为红色部分在文中出现就选E，蓝色部分不是也应证了A吗？

我觉得重要的是问题：According to the passage, a hot spot on Earth’s surface is an indication of which of the following

那么当然是untapped的 reservoir 了！

northeuro

以下是引用yukon在2005-6-23 11:20:00的发言：

25题支持A

Because of its proximity to Earth’s core, the rock at the base of the mantle is much hotter than   rock in the upper mantle.  

不能因为红色部分在文中出现就选E，蓝色部分不是也应证了A吗？

我觉得重要的是问题：According to the passage, a hot spot on Earth’s surface is an indication of which of the following

那么当然是untapped的 reservoir 了！

呵呵，如果是A的话，那么这些溶融态的mantle就还是untapped，就是说封存还没用的，既然还没用过，那么又怎么会在地表形成一个hot sopt呢？

forjoke

25A

un·tapped   adj.

   1. Not having been tapped: an untapped cask of wine.

没加盖才会往外冒。



定位：

The “mantle plume” thus

      formed,
once established, continues to

(40)      channel
hot material from the mantle

base until the reservoir is emptied.

The surface mark of an established

plume is a hot spot





E：Because of its prox-imity to Earth’s core, the rock at the base of the mantle

hot rock是在mantle，不是near core。

yukon

以下是引用northeuro在2005-6-25 17:11:00的发言：


呵呵，如果是A的话，那么这些溶融态的mantle就还是untapped，就是说封存还没用的，既然还没用过，那么又怎么会在地表形成一个hot sopt呢？

这些熔岩是在地幔形成的，当时一定是有形成他的条件，但是因为以后地质条件的变化，untrapped的熔岩喷涌而出。原题说的untapped不是说一直都untrapped，而是说在已经有火山形成的情况下，预示着这种untrapped的岩浆。还是坚持这句话最重要：According to the passage, a hot spot on Earth’s surface is an indication of which of the following-------“Earth’s surface”这才是问题的考点

我以前学地球科学的时候学到过这一段，当然不可能学到原文，我做这题也没用专业知识去解题，我只是想说：A的说法在地球科学常识方面是完全正确的。扯远一点，我国的古代石油天然气的开采，也都是得益于这种untrapped reservior，但你不能说石油天然气在untrapped的条件下就生成了，他们只是在露出地表的时候已经处于untrapped 的状态。

[此贴子已经被作者于2005-7-10 12:10:46编辑过]

yukon

Reservoirs of this hot rock collect

       in the base of the mantle.  When a

reservoir is sufficiently large, a sphere

(35)     of this hot rock forces its way up

through the upper mantle to Earth’s

surface, creating a broad bulge in the

           topography.

这就是tapped reservior变成untapped reservior冲出地表创造火山的过程

[此贴子已经被作者于2005-7-10 12:24:43编辑过]

温弗雷德

25题真讨厌，一环套一环的追踪出处，头都大了

Lucky0506

25题，大家注意力都在untapped。但我个人觉得，

重点应该在：in the base of the mantle。  "hot pot"是in the base of the mantle嘛？非常明显， 不是！ 请看下面加亮部分。

原文：

When a

reservoir is sufficiently large, a sphere

(35)     of this hot rock forces its way up

through the upper mantle to Earth’s

surface, creating a broad bulge in the

topography.  The “mantle plume” thus

      formed, once established, continues to

(40)     channel hot material from the mantle

base until the reservoir is emptied.

The surface mark of an established

plume is a hot spot。

商榷商榷！

kobeda0628

Q22 为何不能选c呢

[此贴子已经被作者于2005-9-22 15:30:09编辑过]

ayang1017

看好多人求翻译，我粗略的翻译了下，其实就是将火山形成的两种原理，翻译的太快肯定好多错的地方，而且好多专业的东西我也没查，大家讲究了吧

      Earth’s surface consists of rigid

       plates that are constantly shifting and

       jostling one another.  late movements 地球的表面由许多坚硬的板块所构成，这些板块持续的移动并互相冲撞。

Line       are the surface expressions of motions

  (5)      in the mantle—the thick shell of rock

that lies between Earth’s crust and its

metallic core.  Although the hot rock of板块的运动是地幔的运动的表面表现，地幔是存在于地壳和金属地核之间的厚的岩石的壳。

the mantle is a solid, under the tre-

mendous pressure of the crust and

(10)      overlying rock of the mantle, it flows like

a viscous liquid.  The mantle’s motions,尽管在地幔中的热的岩石是固体的，在地壳和地幔中的岩石

的巨大压力下，使得地幔象一种粘性液体在流动。

analogous to those in a pot of boiling

water, cool the mantle by carrying hot

material to the surface and returning

(15)      cooler material to the depths.  When 地幔的运动可于一壶烧开的沸水的状态比较，通过将热的物质贷出地表和将温度降低的物质带回地球深层来冷却地幔。

the edge of one plate bends under

another and its cooler material is con-

sumed in the mantle, volcanic activity

occurs as molten lava rises from the

(20)      downgoing plate and erupts through the

       overlying one.当一个板块的边缘弯曲的另一个的下面并且的它的更冷的物质在地幔中被消耗掉了，火山的活动作为融化的岩浆从下层的板块中上升并从上层的板块中爆发出来而发生。

             Most volcanoes occur at plate

boundaries.  However, certain “mis-大多数火山在板块的边缘发生。

placed” volcanoes far from plate

(25)      edges result from a second, indepen-

dent mechanism that cools the deep

interior of Earth.  Because of its prox- 然而，特定的错位火山远离板块边缘是由第二种独立的机制所导致的，这种机制可以冷却地球的更深层的内部

imity to Earth’s core, the rock at the

base of the mantle is much hotter than

(30)      rock in the upper mantle.  The hotter the由于它亲近于地核，在地幔底部的岩石要比地幔上层的岩石热。

mantle rock is, the less it resists flow-

ing.  Reservoirs of this hot rock collect 地幔的岩石越热，它拒绝流动就越少。

       in the base of the mantle.  When a 这种岩石的积蓄池在地幔的底部进行收集。

reservoir is sufficiently large, a sphere

(35)    of this hot rock forces its way up

through the upper mantle to Earth’s

surface, creating a broad bulge in the

topography.  The “mantle plume” thus当一个积蓄池足够的大，这种热的岩石的球体迫使它们向上通过地幔上层一到达地球表面，制造了在地形上一个宽广的突起。

      formed, once established, continues to

(40)     channel hot material from the mantle

base until the reservoir is emptied.

The surface mark of an established

plume is a hot spot—an isolated

region of volcanoes and uplifted terrain

(45)      located far from the edge of a surface

plate.  Because the source of a hot 地幔的p因而形成，一旦形成，它会持续的将地幔底部的热的物质引导出来，直到积蓄池抽空。一个已经形成了的p标记是一个热的场所，一个独立的区域，火山和向上移动的陆地远离地表板块的的边际。

spot remains fixed while a surface

plate moves over it, over a long period

of time an active plume creates a chain

(50)      of volcanoes or volcanic islands, a

track marking the position of the plume

relative to the moving plate.  The natural 因为热的区域的源泉保持固定，而表面板块跨越它而移动，经过一段长的时间一个活动的p，就形成了一连串的火山，和火山岛屿，一个线路表明p相对于移动板块的位置。

history of the Hawaiian island chain

clearly shows the movement of the

Pacific plate over a fixed plume.  夏威夷连串岛屿的历史清楚的表明了大西洋板块越过一个固定p的移动。