louisalz请进，其他xdjm也欢迎进（本月一些有争议的jj讨论）

louisalz

以下是引用amyding85在2006-9-19 11:56:00的发言：
对了，就那道选项2，4，6那个32k吧，整除那个，好像听谁说考场上遇到的是组合，真是担心没有only4这个选项，那咋办阿

别这么多担心了，小心今晚上又失眠。你就想这道题不会遇到。遇到就一定有only4。

amyding85

给你发半天站内信件居然发不出去///汗一个，八成这会网站人太多把信号挤没了

 

恩，那道题我选了几个没有符合的8成事e

1.          x的十位数比y的十位数大几?   C
                    

         (1) x - y=37

         (2) x的个位数比y的个位数大
                    (某个数)

选啥？c?

amyding85

36. GWD 3-37 nickel 那道，我记得答案讨论的是Ｅ，可我上去就是看着E巨不对，结果知道答案还选了个别的，真个是不知福啊。
            

（感谢yolaunndalyy  9-14）
            

 

 

 Because mining and refining nickel is costly, researchers have developed an alternative method for extracting nickel using Streptanthus polygaloides, a plant that absorbs and stores nickel form the soil as it grows.  The researchers incinerated a crop of Streptanthus they grew in nickel-rich soil.  By chemically extracting nickel from the ash, they produced 100 pounds of nickel per acre of land at a total cost per pound slightly above that of current mining.

Which of the following, if true, most strongly supports the conclusion that the use of Streptanthus to extract nickel will be commercially adopted?

A.      The season in which the researchers grew Streptanthus was an unusually favorable one, with the right amount of precipitation to maximize the growth rate of Streptanthus.

B.       Because lowering the concentration of nickel in the soil can make land much better for agriculture in general, a plot on which Streptanthus has been grown and harvested can be sold for substantially more than it cost.
            

C.       More air pollution is generated for each pound of nickel produced by extracting it from Streptanthus than is generated using conventional mining and refining

D.      The land on which the researchers planted Streptanthus was unusually free of the various weeds that can compete with Streptanthus for water, nutrients, and sunlight.

E.       It is extremely rare for soil to contain higher concentrations of nickel than the concentrations present in the researchers’ experimental plot.
            

居然选e么？答案b看着挺对阿

居然选e么？答案b看着挺对阿

louisalz

脑子都木了，懒得想了。那道数学我觉得应该是C。上面的逻辑就是选B。

[此贴子已经被作者于2006-9-19 16:09:13编辑过]

amyding85

我也俨然不行了

louisalz

你还没睡呀？能再看道数学JJ，我突然发现这道题我好像以前做错了，

K为正整数，从(-15)一直加到K的连续整数和是51，问K=? 

好像这个站内消息有问题，刚才给你发了无数条都没成功。

amyding85

我马上算。18

简单的题记不住,  所有我印象中难题只有一题不在JJ, 此题提干比较难理解,在题号20不到一点的时候跳出来.题干: 某人的 taxable  income == total income --  some deductions , 其中一种deduction 为donation, 此人作出的donation 导致了 income tax 减少了217 刀, 问donate了多少钱.

1  高于7500的taxable income 按照固定税率28%交税

2 此人taxable income为7753

选啥

布瓜丫丫

以下是引用louisalz在2006-9-19 21:50:00的发言：

你还没睡呀？能再看道数学JJ，我突然发现这道题我好像以前做错了，

K为正整数，从(-15)一直加到K的连续整数和是51，问K=? 

好像这个站内消息有问题，刚才给你发了无数条都没成功。

对了，我今天也碰到这道题了，我忘记答案了，你们再算一下。用S=na1+n(n-1)d/2算一下就能得到：）

布瓜丫丫

以下是引用amyding85在2006-9-19 16:08:00的发言：

36. GWD 3-37 nickel 那道，我记得答案讨论的是Ｅ，可我上去就是看着E巨不对，结果知道答案还选了个别的，真个是不知福啊。
   

（感谢yolaunndalyy  9-14）
   

 

 

 

 Because mining and refining nickel is costly, researchers have developed an alternative method for extracting nickel using Streptanthus polygaloides, a plant that absorbs and stores nickel form the soil as it grows.  The researchers incinerated a crop of Streptanthus they grew in nickel-rich soil.  By chemically extracting nickel from the ash, they produced 100 pounds of nickel per acre of land at a total cost per pound slightly above that of current mining.

Which of the following, if true, most strongly supports the conclusion that the use of Streptanthus to extract nickel will be commercially adopted?

A.      The season in which the researchers grew Streptanthus was an unusually favorable one, with the right amount of precipitation to maximize the growth rate of Streptanthus.

B.       Because lowering the concentration of nickel in the soil can make land much better for agriculture in general, a plot on which Streptanthus has been grown and harvested can be sold for substantially more than it cost.
   

C.       More air pollution is generated for each pound of nickel produced by extracting it from Streptanthus than is generated using conventional mining and refining

D.      The land on which the researchers planted Streptanthus was unusually free of the various weeds that can compete with Streptanthus for water, nutrients, and sunlight.

E.       It is extremely rare for soil to contain higher concentrations of nickel than the concentrations present in the researchers’ experimental plot.
   

居然选e么？答案b看着挺对阿

居然选e么？答案b看着挺对阿

居然选e么？答案b看着挺对阿

这道题也有，但是答案中B这个选项已经改了，换成另外说法了，小心！！！

louisalz

这题我觉得选E，条件之间差的太远。当然如果不是我没看懂的话。

18那个帮我写个过程吧。我原来也是18，这回算不对了