tania的考试复习计划贴：谢谢大家的帮助和支持！！M51,V41,760!

wwwhahchn

天山-3-3

Scientists have made genetic modifications to cotton to increase its resistance to insect pests. According to farmers’ reports, the amount of insecticide needed per acre to control insect pests was only slightly lower for those who tried the modified seed than for those who did not. Therefore, since the modified seed costs more than ordinary seed without producing yields of higher market value, switching to the modified seed would be unlikely to benefit most cotton farmers economically.

Which of the following would it be most useful to know in order to evaluate the argument?

A. Whether farmers who tried the modified cotton seed had ever tried growing other crops from genetically modified seed

B. Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops

C. Whether for most farmers who grow cotton it is their primary crop

D. Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did

E. Whether most of the farmers who tried the modified seed did so because they had previously had to use exceptionally large quantities of insecticide

一开始选了D，看了讨论后同意E，原文比较的是用了新品种的人与没用新品种的人的insectide的用量，E是用了新品种的人和自己以前没用新品种的失衡的insectide用量的比较，说明虽然跟别人用量没有下降太多，但是比自己以前少了很多（或者不多），可以evaluate

B是无关，就算要从insectide的价格上做文章，也应该比较价格的下降是否足以弥补seed cost的损失，而不是这种insectide的价格和其他insectide价格的比较

争论较大，来确认一下

tania

以下是引用tania在2005-9-10 16:44:00的发言：

看看这个对不对？？

还是觉得有些问题，这不能说明是因为有histidine --> 能存活啊，也许是其他因素导致的呢？？

你如何看待E选项呢？

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

对那些原来不能生存的植物来说，原来因为没有histidine，所以不能生存，现在因为有了这个特殊的herb，也就是有了histidine（会不会是因为有了其他的什么物质是他们生存，而不是histidine呢？？），所以他们也能生存了，这个就能得出有histidine --> 能生存，无histidine --> 不能生存

E说其他植物也有histidine，原文又说这些植物也可以存活，但是有一个gap，就是，没把这些植物的存活与histidine联系起来，所以无法加强（这不是E选项的意思吧？？）

大家讨论

tania

以下是引用wwwhahchn在2005-9-10 17:25:00的发言：

天山-3-3

Scientists have made genetic modifications to cotton to increase its resistance to insect pests. According to farmers’ reports, the amount of insecticide needed per acre to control insect pests was only slightly lower for those who tried the modified seed than for those who did not. Therefore, since the modified seed costs more than ordinary seed without producing yields of higher market value, switching to the modified seed would be unlikely to benefit most cotton farmers economically.

Which of the following would it be most useful to know in order to evaluate the argument?

A. Whether farmers who tried the modified cotton seed had ever tried growing other crops from genetically modified seed

B. Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops

C. Whether for most farmers who grow cotton it is their primary crop

D. Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did

E. Whether most of the farmers who tried the modified seed did so because they had previously had to use exceptionally large quantities of insecticide

一开始选了D，看了讨论后同意E，原文比较的是用了新品种的人与没用新品种的人的insectide的用量，E是用了新品种的人和自己以前没用新品种的失衡的insectide用量的比较，说明虽然跟别人用量没有下降太多，但是比自己以前少了很多（或者不多），可以evaluate

B是无关，就算要从insectide的价格上做文章，也应该比较价格的下降是否足以弥补seed cost的损失，而不是这种insectide的价格和其他insectide价格的比较

争论较大，来确认一下

同意选E，但是理由和你不同。

因为用了新品种的人之前就是没有用新品种的人，所以我觉得不存在比较对象的不同

我理解原文的推理是：种子成本差不多，用的农药量也差不多，所以没什么经济效益。E选项说要看是不是农药的量特别大，也就是是不是在成本中占了主要因素，如果不是，那不能得出这个结论，因为农药只是成本决定因素中的一小部分，如果是，那可以得出结论，因为农药占了大部分成本，所以可以从用的农药量差不多推出成本差不多。

wwwhahchn

以下是引用tania在2005-9-10 18:23:00的发言：

对那些原来不能生存的植物来说，原来因为没有histidine，所以不能生存，现在因为有了这个特殊的herb，也就是有了histidine（会不会是因为有了其他的什么物质是他们生存，而不是histidine呢？？），所以他们也能生存了，这个就能得出有histidine --> 能生存，无histidine --> 不能生存

E说其他植物也有histidine，原文又说这些植物也可以存活，但是有一个gap，就是，没把这些植物的存活与histidine联系起来，所以无法加强（这不是E选项的意思吧？？）

大家讨论

晕，看错了

E应该是削弱吧，成熟后histidine含量少了甚至没有了，但是还是能存活，这个不是削弱么？？

tania

还有一道数学题向大家请教一下，主要是关于题目的问法：

Q28:
A school administrator will assign each student in a group of n students to one of m classrooms. If 3 < m < 13 < n, is it possible to assign each of the n students to one of them classrooms so that each classroom has the same number of students assigned to it?
(1) It is possible to assign each of 3n students to one of m classrooms so that each classroom has the same number of students assigned to it.
(2) It is possible to assign each of 13n students to one of m classrooms so that each classroom has the same number of students assigned to it.

题目问的是possible，该如何理解呢？是不是只要有可能就行了啊，这样的话不是应该选D吗？条件1虽然不一定能推出n被m整除，但是有可能啊

szcgo

我也只有十天了 加油加油阿

tania

天山－4－12. For the farmer who takes care to keep them cool, providing them with high-energy feed, and milking them regularly, Holstein cows are producing an average of 2,275 gallons of milk each per year.

A.  providing them with high-energy feed, and milking them regularly, LACE>HolsteinLACE> cows are producing

E  provided with high-energy feed and milked regularly, Holstein cows will produce

我选的是A，觉得E涉及到分词在中间歧义修饰的问题，但是关于E的支持者也有很多，他们说只有现分才涉及这个问题，过去分词不存在这个问题，大家的意见呢？？

tania

以下是引用wwwhahchn在2005-9-10 18:48:00的发言：

晕，看错了

E应该是削弱吧，成熟后histidine含量少了甚至没有了，但是还是能存活，这个不是削弱么？？

我想是不是原文对应的是histidine 和grow的关系，这里说maturity,histidine减少了，就是说都用在grow上了？？削弱不太象

wwwhahchn

天山-3-24

Each year red-winged blackbirds stop in a certain region of Midland Province on their spring and fall migrations. In the fall, they eat a significant portion of the province's sunflower crop. This year Midland farmers sought permits to set out small amounts of posioned rice during the blackbirds' spring stop in order to reduce the fall blackbird poplution. Some residents voiced concern that the rice could threaten certain species of rare migratory birds. Nevertheless, the wildlife agency approved the permits. Which of the following, if true, most helps to justify the widlife agency's approved of the permits, given the conerns voiced by some residents? A .In the region where the red-winged blackbirds stop, they are the first birds to be present in the spring. B The poison that farmers want to use does not koll birds  but rather makes them incapable of producing viable eggs. C. Since rice is not raised in Midland Province, few species of birds native to the province normally eat rice. D .Without the permit, any farmers shown to have set out poison for the blackbirds would be heavily fined. E. The posion that farmers got approval to use has no tast or smell that would make it detectable by birds.

这题选什么？？我选了C，看了讨论，A有道理，但也有缺陷，搞不清为什么C不对

你上面两道数学都是天山4的吧？偶明天做了再看

wwwhahchn

帖一下我研究的天山3的答案，大家对一下

DEEDB，CEECE

BEEDC，BDDEC

ECDCA，CBACD

EEEAA，CBDEB

有几个我觉得答案错了