进军美利坚tpo阅读疑难解答帖

zenglingyuanUID: 2773905

TPO12 第二篇 10题没答案啊

zenglingyuanUID: 2773905

8. According to paragraph 6. Which of the following statements about aquifers in deserts is true?  Water from limestone and sandstone aquifers is generally better to drink than water from sand and gravel aquifers  Sand and gravel aquifers tend to contain less groundwater than limestone or sandstone aquifers  Groundwater in deep aquifers is more likely to be recharged than groundwater in shallow aquifers  Sedimentary rocks, because they are porous, are not capable of storing large amounts of groundwater conglomerates, are important potential sources of groundwater. Large quantities of water may also be
stored in lime stones when joints and cracks have been enlarged to form cavities. Most limestone and sandstone aquifers are deep and extensive but may contain ground waters that are not being recharged. Most shallow aquifers in sand and gravel deposits produce lower yields, but they can be rapidly recharged. Some deep aquifers are known as "fossil waters. The term "fossil" describes water that has been present for several thousand years. These aquifers became saturated more than 10,000 years ago and are no longer being recharged.

8. According to paragraph 6. Which of the following statements about aquifers in deserts is true?  1.Water from limestone and sandstone aquifers is generally better to drink than water from sand and gravel aquifers
        2.Sand and gravel aquifers tend to contain less groundwater than limestone or sandstone aquifers  
          3.Groundwater in deep aquifers is more likely to be recharged than groundwater in shallow aquifers
         4. Sedimentary rocks, because they are porous, are not capable of storing large amounts of groundwater
答案选第一个 根本没有原文支持。。。这种比较级的选项按套路都是错的。居然。。。。。。

wuqian0801UID: 2637709

Paragraph 5: In this newly emergingeconomic order, workers sometimes organized to protect their rights andtraditional ways of life. Craft workers such as carpenters, printers, andtailors formed unions ...
dandan17 发表于 2010-8-25 18:56

前面说了工人came together 后面又说工人运动能combine force 重复表达了～～

另外，momentum的词义解释：strength or force gained by motion or through the development of events  这个不就是在说它通过什么什么而进步了。。momentum和力量米有关系。

dandan17UID: 2812933

前面说了工人came together 后面又说工人运动能combine force 重复表达了～～

另外，momentum的词义解释：strength or force gained by motion or through the development of events  这个不就是在说它通过什么 ...
wuqian0801 发表于 2010-8-26 06:04

和力量米有关系么？
strength or force不是么？
后面是势力瓦解，前面是获得势力呀。came together只能表明是聚集在一起

wuqian0801UID: 2637709

We all know that many more people today are right-handed than left-handed. Can one trace this same pattern far back in prehistory? Much of the evidence about right-hand versus left-hand dominance come ...
zenglingyuan 发表于 2010-8-25 23:38

One also has to make the assumption that hands were stenciled palm downward!aa left hand stenciled palm upward might of course look as if itwere a right hand
=>假设手掌朝下stenciled（印刻）的。但是左手手掌朝上的时候像右手朝下的手。(左手朝上的样子和右手朝下的样子一样)

wuqian0801UID: 2637709

和力量米有关系么？
strength or force不是么？
后面是势力瓦解，前面是获得势力呀。came together只能表明是聚集在一起
dandan17 发表于 2010-8-26 06:18

labor's strength collapse 优势没了
哪来的势力啊

wuqian0801UID: 2637709

8. According to paragraph 6. Which of the following statements about aquifers in deserts is true?  Water from limestone and sandstone aquifers is generally better to drink than water from sand and gra ...
zenglingyuan 发表于 2010-8-25 23:44

什么意思啊? 虾米叫比较级按套路都是错的？

fsi206914UID: 2684106

TPO6 蒸汽机那篇

Paragraph 2: The source had long been known but not exploited. Early in the century, a pump had come into use in which expanding steam raised a piston in a cylinder，and atmospheric pressure brought it down again when the steam condensed inside the cylinder to form a vacuum．This “atmospheric engine,” invented by Thomas Savery and vastly improved by his partner．Thomas Newcomen, embodied revolutionary principles, but it was so slow and wasteful of fuel that it could not be employed outside the coal mines for which it had been designed. In the 1760s, James Watt perfected a separate condenser for the steam, so that the cylinder did not have to be cooled at every stroke; then he devised a way to make the piston turn a wheel and thus convert reciprocating (back and forth) motion into rotary motion. He thereby transformed an inefficient pump of limited use into a steam engine of a thousand uses. The final step came when steam was introduced into the cylinder to drive the piston backward as well as forward thereby increasing the speed of the engine and cutting its fuel consumption.

6. According to paragraph 2, Watt's steam engine differed from earlier steam engines, in each of the following ways, except:
 It used steam to move a piston in a cylinder.
 It worked with greater speed.
 It was more efficient in its use of fuel.
 It could be used in many different ways.

我选的D，答案A，求教

kila1002UID: 2806614

383# fsi206914
In the 1760s, James Watt perfected a separate condenser for the steam, so that the cylinder did not have to be cooled at every stroke这句话就能得出A是答案，D如此抽象的选项，基本就是对的。

sourjuiceUID: 2869051

TPO8 这道题不明白，谢谢解答
Paragraph 4 Dissatisfaction with conventional explanations  for dinosaur extinctions  led  to a
surprising  observation  that,  in  turn,  has  suggested  a  new  hypothesis. Many  plants  and  animals
disappear abruptly from the fossil record as one moves from layers of rock documenting the end of
the  Cretaceous  up  into  rocks  representing  the  beginning  of  the  Cenozoic  (the  era  after  the
Mesozoic). Between the  last  layer of Cretaceous rock and the first  layer of Cenozoic rock, there  is
often a thin layer of clay. Scientists felt that they could get an idea of how long the extinctions took
by determining how long it took to deposit this one centimeter of clay and they thought they could
determine the time it took to deposit the clay by determining the amount of the element iridium (lr)
it contained.   

8. In paragraph 4, all the following questions are answered EXCEPT:
○Why is there a layer of clay between the rocks of the Cretaceous and Cenozoic?
○Why were scientists interested in determining how long it took to deposit the layer of clay at
the end of the Cretaceous?
○What was the effect of the surprising observation scientists made?
○Why did scientists want more  information about  the dinosaur extinctions at  the end of the
Cretaceous?
答案为什么是A？

lxy2mathUID: 2852700

383# fsi206914

earlier steam engines------"atmospheric pressure brought it down again "
Watt's steam engine ------"steam was introduced into the cylinder to drive the piston backward as well as forward "

dandan17UID: 2812933

问3道题。前面有人问过，可我还是没想明白诶～谢谢啦1.

TPO4  Deer Populations of the Puget Sound!

Paragraph 2: Nearly any kind of plant of theforest understory can be part of a deer's diet. Where the forest inhibits thegrowth of grass and other meadow plants, the black-tailed deer browses onhuckleberry, salad, dogwood, and almost any other shrub or herb. But this isfair-weather feeding. What keeps the black-tailed deer alive in the harsherseasons of plant decay and dormancy? One compensation for not hibernating isthe built-in urge to migrate.
Deer may move from high-elevation browse areas in summerdown to the lowland areas in late fall. Even with snow on the ground, the highbushy understory is exposed; also snow and wind bring down leafy branches ofcedar, hemlock, red alder, and other arboreal fodder.


2.  It can be inferred from thediscussion in paragraph 2 that winter conditions
A Cause some deer to hibernate
B Make food unavailable in the highlands for deer

C Make it easier for deer to locate understoryplants

D Prevent deer from migrating during the winter


前面的同学说：
文勇的Answer是C。我选的B，理由为段2中的红字部分。鹿群从高低迁徙到低地平原是因为在冬季的时候高地食物匮乏。而低地上有足够食物，因为林叶层厚，还有雪砸下来的树枝树叶之类的。
不知为啥答案是C。求指点。
反衬：
选B是对的。
文勇的答案是错的


Me: BC都对吧。

dandan17UID: 2812933

2.TPI11 Begging by Nestlings

Further evidence for the costs of begging comes from a study of differences inthe begging calls of warbler species that nest on the ground versus those thatnest in the relative safety of trees. The young of ground-nesting warblersproduce begging cheeps of higher frequencies than do their tree-nestingrelatives. These higher-frequency sounds do not travel as far, and so maybetter conceal the individuals producing them, who are especially vulnerable topredators in their ground nests. David Haskell created artificial nests withclay eggs and placed them on the ground beside a tape recorder that played thebegging calls of either tree-nesting or of ground-nesting warblers.The eggs“advertised” by the tree-nesters' begging calls were found bitten significantlymore often than the eggs associated with the ground-nesters' calls.

4. Paragraph 2 indicates that the begging calls oftree nesting warblers
○
put them at more riskthan ground-nesting warblers experience
○
can be heard from agreater distance than those of ground-nesting warblers
○
are more likely toconceal the signaler than those of ground-nesting warblers
○
have higher frequenciesthan those of ground nesting warblers

Me: 虽然我选的是B，A哪里错了？（前面wuqian的解释没看懂）

dandan17UID: 2812933

3.TPO11 Begging by Nestlings;

Furtherevidence for the costs of begging comes from a study of differences in thebegging calls of warbler species that nest on the ground versus those that nestin the relative safety of trees. The young of ground-nesting warblers producebegging cheeps of higher frequencies than do their tree-nesting relatives.These higher-frequency sounds do not travel as far, and so may better concealthe individuals producing them, who are especially vulnerable to predators intheir ground nests. David Haskell created artificial nests with clay eggs andplaced them on the ground beside a tape recorder that played the begging callsof either tree-nesting or of ground-nesting warblers.The eggs “advertised” bythe tree-nesters' begging calls were found bitten significantly more often thanthe eggs associated with the ground-nesters' calls.7 S8 c) K' i: p
. Theexperiment described in paragraph 2 supports which of the following conclusions?
○ Predators are unable todistinguish between the begging cheeps of ground-nesting and those oftree-nesting warblers except by the differing frequencies of the calls.

○ When they can find them, predators prefer the eggs oftree-nesting warblers to those of ground-nesting warblers.

○ The higher frequencies of the begging cheeps ofground-nesting warblers are an adaptation to the threat that ground-nestingbirds face from predators

○ The danger of begging depends more on the frequency ofthe begging cheep than on how loud it is.

我选的是D, 答案是C
不理解

sourjuiceUID: 2869051

我的问题还没解答，有人会吗，谢谢啦，385楼的，别忘记了啊