GWD 28，我的答案，大家来交流一下！

fanxd28

多谢答案,但是我的第5题是不是有问题:

28-5: According to the passage, which of the following is true of the experiments on domestic hens conducted by Sherwin’s research team?

A: Only a small number of observer hens appeared to learn to avoid food that was demonstrated by other hens to be noxious.

B: Observer hens ingested food preferentially only after numerous instances of witnessing demonstrator hens preferentially ingest that type of food.

C: Observer hens appeared unable to recognize when demonstrator hens found a particular food especially palatable.

D: Observer hens appeared unable to recognize when demonstrator hens found a particular food especially palatable.

E: Demonstrator hens altered their behavior less obviously in response to noxious foods than in response to highly palatable foods.

如上,C和D一样,答案好象也不可能是E啊?

hy903

这里人气比较旺，来这里请教一下19题

28-19: Plankton generally thrive in areas of the ocean with sufficient concentrations of certain nitrogen compounds near the surface where plankton live. Nevertheless, some areas, though rich in these nitrogen compounds, have few plankton. These areas have particularly low concentrations of iron, and oceanographers hypothesize that this shortage of iron prevents plankton from thriving. However, an experimental release of iron compounds into one such area failed to produce a thriving plankton population, even though local iron concentrations increased immediately.

Which of the following, if true, argues most strongly against concluding, on the basis of the information above, that the oceanographers’ hypothesis is false?

A: Not all of the nitrogen compounds that are sometimes found in relatively high concentrations in the oceans are nutrients for plankton.

B: Certain areas of the ocean support an abundance of plankton despite having particularly low concentrations of iron.

C: The release of the iron compounds did not increase the supply of nitrogen compounds in the area.

D: A few days after the iron compounds were released, ocean currents displaced the iron-rich water from the surface.

E: The iron compounds released into the area occur naturally in areas of the ocean where plankton thrive.

好象不少人选d,可是我不太明白d的意思。

我选了a, 如果说实验中nitrogen 和plankton 所需要的不一样的话，即使iron量

够了，也没有办法令plankton thrive。

请指教！

tonywzj

d讲那个实验里，虽然release了iron，但没几天就被海水冲走了，Plankton都来不及吸收，所以实验的结果不可靠。自然就weaken了结论。

tonywzj

gwd 28-20

28-20: In the 1820’s, anthracite coalfields opened in eastern Pennsylvania, and when canals and eventually railroads reached into the region, there were substantial supplies of coal that was exported to the nation’s growing mills, forges, factories, and railways.

A: when canals and eventually railroads reached into the region, there were substantial supplies of coal that was

B: once canals and eventually railroads reaching into the region, there were substantial supplies of coal having been

C: with canals and eventually railroads reaching into the region, there had been substantial supplies of coal

D: canals and eventually railroads reached into the region, with substantial supplies of coal being

E: as canals and eventually railroads reached into the region, substantial supplies of coal were

一开始也选了E，但仔细一看，后面那个句子的主语是supplies，从逻辑意思上supplies were exported...可以吗？请NN指正。

[此贴子已经被作者于2005-11-22 0:45:54编辑过]

tonywzj

gwd 28-28

28-28: Which of the following most logically completes the argument?

A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Possibly, therefore, the herb’s high histidine production is what allows it to grow in metal-rich soils, a hypothesis that would gain support if ______.

A: histidine is found in all parts of the plant – roots, stem, leaves, and flowers

B: the herb’s high level of histidine production is found to be associated with an unusually low level of production of other amino acids

C: others of the closely related group of plants are also found to produce histidine in large quantities

D: cultivation of the herb in soil with high concentrations of the metals will, over an extended period, make the soil suitable for plants to which the metals are toxic

E: the concentration of histidine in the growing herb declines as the plant approaches maturity

这题好像什么答案都有，除了B没人选。

我认为是D，请注意histidine...renders these metals chemically inert. 这句话的意思是氨基酸使得金属的变得惰性，我理解为使得金属的毒性不再挥发出来了。那如果种herb种一段时间，连别的怕这种金属毒性的植物都可以种了，那不正是支持了结论：the herb’s high histidine production is what allows it to grow in metal-rich soils（原因是histidine抑止了金属毒性）

drift_er

GWD-28key

EEC()E,ECCBC,CDCED,BAEDE,ADCEC,()BECD,ECA()(),()BAAC,B

mydream1977

关于GWD-18

Which of the following most logically completes the passage?

Concerned about financial well-being of its elderly citizens, the government of Runagia decided two years ago to increase by 20 percent the government-provided pension paid to all Runagians over 65. Inflation in the intervening period has been negligible, and the increase has been duly received by all eligible Runagians. Nevertheless, many of them are no better off financially than they were before the increase, in large part because ______.

A: They rely entirely on the government pension for their income

B: Runagian banks are so inefficient that it can take up to three weeks to cash a pension check

C: They buy goods whose prices tend to rise especially fast in times of inflation

D: The pension was increased when the number of elderly Runagians below the poverty level reached an all-time high

E: In Runagia children typically supplement the income of elderly parents, but only by enough to provide them with a comfortable living   

个人认为答案是D,而不是E,请NN们讨论

scorp_w

15楼的mm你真强！5个以内！太猛了！

我错了9个，其中有一个失误！

在这里，我要强烈的反对20题的答案！我坚决的认为选A，这样我就少错了一个！嗬嗬！

D项是明显错误！with substantial supplies of coal being用来修饰canals and eventually railroads 明显with后的不是canals and eventually railroads 所具有的性质！而且句子中心变了！

E项，supplies were exported你们觉得对吗？出口的应该是coal，而不是他的供应吧！~

B的having been时态是不对的！

C的with是没有修饰的！

只有A项虽然there be很罗嗦！但没有任何原则的错误！

there be不能一看就排除的！他只是不好的表达！但不是错误的！

望大家讨论！

scorp_w

还有，nnd前十个竟然错了3个！包括失误的第7题！让我十分的不爽！

菜鸟阿菜鸟，何时能变成大牛！

继续努力，吼一声！！！！！！！！！！！！！！！！！！！！！！！

xuedidage

28-28: Which of the following most logically completes the argument?

A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Possibly, therefore, the herb’s high histidine production is what allows it to grow in metal-rich soils, a hypothesis that would gain support if ______.

A: histidine is found in all parts of the plant – roots, stem, leaves, and flowers

B: the herb’s high level of histidine production is found to be associated with an unusually low level of production of other amino acids

C: others of the closely related group of plants are also found to produce histidine in large quantities

D: cultivation of the herb in soil with high concentrations of the metals will, over an extended period, make the soil suitable for plants to which the metals are toxic

E: the concentration of histidine in the growing herb declines as the plant approaches maturity

I strongly recommend D for answer.  Only D supports that the amino acid makes the soil's mineral inert.