prep1-16,没有讨论过,百思不得解.

lt496842me

这是俩评估题，他们的正确选项可以对文中的推理起到正反两方面作用

1：比如选项A，回答YES和NO是两个相反的结果，OK之（运气好  =。=）

2：我直接选D了（张的就象答案）。按我自己的理解，是给出他因。汽车尾气的有无也会导致2个相反的结果。

EricMIT

PREP:16  A的确没错。那么我的问题是，C 为何不对呢？

(C) Whether there are any technological advances that show promise of reducing the cost of extracting uranium from seawater

如果有这种技术，商业化就有可能，如果没有这种技术，商业化就不可能吧？

PREP:17 

17.   (27669-!-item-!-188;#058&003302)

 

Urban air contains more sulfur dioxide than does rural air, and plants in cities typically grow more slowly than do plants in rural areas.  In an experiment to see how much of the difference in growth is due to sulfur dioxide, classes in an urban and a rural school grew plants in greenhouses at their schools and filtered the greenhouse air to eliminate sulfur dioxide.  Plants in the urban greenhouse grew more slowly than those in the rural greenhouse.

 

Which of the following, if true, would it be most important to take into account in evaluating the result?

 

(A) The urban school was located in a part of the city in which levels of sulfur dioxide in the air were usually far lower than is typical for urban areas.

(B) At both schools, the plants in the greenhouses grew much more quickly than did plants planted outdoors in plots near the greenhouses.

(C) The urban class conducting the experiment was larger than the rural class conducting the experiment.

(D) Heavy vehicular traffic such as is found in cities constantly deposits grime on greenhouse windows, reducing the amount of light that reaches the plants inside.

(E) Because of the higher levels of sulfur dioxide in the air at the urban school, the air filters for the urban school's greenhouse were changed more frequently than were those at the rural school.

两个问题：

1：这个提干的结论是什么呢？就是Plants in the urban greenhouse grew more slowly than those in the rural greenhouse.？请NN帮分析一下这个题目的逻辑主线。

2：这里提干的evaluate 可以做 let the conclusion more make sense 理解么？感觉这题跟一般的Evaluate题目不一样。

因为如果D成立，那么证明了实验的结论的合理性，如果D不成立，那么跟原文结论有什么关系么？

这两题全部做错，分别选了C和B，还以为肯定没错。晕啊。Evaluate是我的难点，，，嗨嗨。

谢谢NN解答。

ruru8ruru8

16

(C) Whether there are any technological advances that show promise of reducing the cost of extracting uranium from seawater

 

Ｙ新科技→成本降低【但是还是比陆地高】→海洋提取没有效益

Ｎ新科技→成本未降低→海洋提取没有效益

 

 

17

结论：抽掉二氧化硫的因素，城市的植物生长速度还是比乡村慢，why

　　　（一定有他因）

(D) Heavy vehicular traffic such as is found in cities constantly deposits grime on greenhouse windows, reducing the amount of light that reaches the plants inside.
            

Y阳光被遮住→城市的植物生长速度比乡村慢

Ｎ阳光被遮住→城市的植物生长速度不会比乡村慢（一样快）

 

蓝色回忆

以下是引用wangwei8581在2007-7-27 12:15:00的发言：

我觉得16题的B也有道理啊

如果这种矿产必须就地开采，就地使用，就算是海底的贵，海上要用也必须从海底开采啊？

同问.

southnorth

佩服。

Ｙ新科技→成本降低【但是还是比陆地高】→海洋提取没有效益
            

Ｎ新科技→成本未降低→海洋提取没有效益

冰峰溪谷LQ

以下是引用wangwei8581在2007-7-27 12:15:00的发言：

我觉得16题的B也有道理啊

如果这种矿产必须就地开采，就地使用，就算是海底的贵，海上要用也必须从海底开采啊？

也想请问B为什么不可以    虽然A我也能理解。。。

做的时候  就纠结在A和B 之间。。。

qiongyue0312

up up

fff777

以下是引用wangwei8581在2007-7-27 12:15:00的发言：

我觉得16题的B也有道理啊

如果这种矿产必须就地开采，就地使用，就算是海底的贵，海上要用也必须从海底开采啊？

以下是引用冰峰溪谷LQ在2009-4-9 22:17:00的发言：

也想请问B为什么不可以    虽然A我也能理解。。。

做的时候  就纠结在A和B 之间。。。

Most of the world's supply of uranium currently comes from mines.  It is possible to extract uranium from seawater, but the cost of doing so is greater than the price that uranium fetches on the world market.  Therefore, until the cost of extracting uranium from seawater can somehow be reduced, this method of obtaining uranium is unlikely to be commercially viable.

Which of the following would it be most useful to determine in evaluating the argument?

(A) Whether the uranium in deposits on land is rapidly being depleted

(B) Whether most uranium is used near where it is mined    

B 的问题是和evaluate无关阿  wangwei同志的思维太发散了阿 说的是海水提取 怎么联想到海底挖掘了？

qqiaoer

THANKS！

opos

原来如此