伞 妖，杯具的囧丁，遛狗

Ting2010

被G杀，别的不说了，这里放狗，困境区有楼，555~

AWA  刚刚在题库里搜索没有搜到啊~疑惑

AA  一个公司要省新员工培训费，决定让老员工参加一个program，记录他们的habits and activities,让新员工follow，以省去高昂的cost
AI   说fossil fuels很宝贵，应该adopt international 条规来减少各国对fossil fuels 的dependence

MATH
1     K大于M，问K的值。K,M都是正整数(狗里有)
a. K^2+M^2=25
b. K^3+M^3=91

2     员工有经济学学位的80%和会说法语的40% 每个员工either有学位or会所法语or both 求既会说法语有有学位的人（狗里有）
    确实是求‘the precent of people who have XXX also can speak Frence’
    50%
3   地图填色问题，AB(C)D,A与B与D相邻，C在B里，不挨着A与D，题意好像是说有三种颜色可用，共几种方案(狗里有) 有个图  最后36

4   Which line in the following is perpendicular(垂直) to line y = 5x(狗里有，补充选项)
     Answer include: y = -5x , y= (1/5)x, y = (-1/5)x , y=1/(5x) , y=-1/(5x)
     就选y = (-1/5)x
5    已知a,b为正，5a-7(b+3)=2,问a-b最不可能是下面哪项（之前的狗主人记错数字了）
A. 1B. 2 C. 4 D. 5 E.7
     算来算去A B都不行，犹豫半天选了A
----新狗
6   一个桌布，搭在桌子上四周都垂下来1/2 inch，桌子长x宽y，求8个桌布垂下来的面积
   8x+8y-8
7   有五条射线，每两个间隔角度为20、15、25、30   求任取两个射线所得的0~180°角度有几种
    我选的10
8   一个公司，有CPAs 60%，一共有40%男工人，80%的男工人都是CPAs，求有多少女CPAs
    60%-40%*80%=28%（貌似。。）
9   DS 求n^2 mod 3=1
   a  n是偶数
   b  n^2=9k^2+6k+1
   我选的B

暂时不记得了，想到再补充！

VERBAL(悲伤的开始。。)
SC 我惨死，不说了
CR 吃c导致p，在怀孕的妇女中做调查，发现吃了c的woman和没吃c的woman比例相同，问weaken。答案：pregnant woman很特殊，因为怀孕的女的还吃什么了，可以免于得p
   说做了个实验，把员工分成两组，一组告诉他们给他们喝ordinary的coffee, 另一组给他们喝没有咖啡的。但是事实操作上却对调了一下。然后那组事实上喝了无咖啡因的员工打字速度比被告知要喝无咖啡因事实上喝的是正常咖啡因的那组员工要快的多。结论是咖啡因对productivity并没有提高作用。问削弱：

选项有那组员工打字虽然快但是出错率很多

GWD那个原题
In parts of the Caribbean, the manatee, an endangered marine mammal, has long been hunted for its meat.  Having noted the manatee hunters’ expert knowledge of manatees’ habits, local conservationists are encouraging the hunters to stop hunting and instead to take tourists on boat rides to see manatees.  Tourist interest is high, so the plan has promise of achieving the twin goals of giving the former hunters a good income and helping ensure the manatees’ survival.
Which of the following, if true, raises the most serious doubt about the plan’s chance of success?
1.Many tourists who visit these parts of the Caribbean are uninterested in manatees and would not be willing to pay what the former manatee hunters would have to charge for boat rides to see manatees.
2.Recovery of the species would enable some hunting to continue without putting the manatees’ survival in jeopardy again.
3.In areas where manatees have traditionally been hunted for food, local people could easily replace the manatee meat in their diets with other foods obtained from the sea.
4.There would not be enough former manatee hunters to act as guides for all the tourists who want to see manatees.
5.To maintain their current income, manatee hunters who switched to guiding tourists would have to use far larger boats and make many more trips into the manatees’ fragile habitat than they currently do.
是选5吧~

RC
第一篇什么妇女的，实验的，忘了。。
第二篇那个lava的，表问我，当时心慌死了，啥也没看进去
第三篇乌龟听力
做了一大堆实验
P1  以前有两个人做实验，觉得乌龟是聋的
P2  后来各种实验，说，把乌龟放在桌子上，敲桌子（还是干嘛，有声音），说乌龟吓得一抖，但是敲隔壁的桌子他就没反应。人就说，乌龟不靠听空气传播的声音，靠爪子感应震动啥的
P3  乌龟耳朵只有中耳内耳，跟人怎么怎么不同（有考题）百度一下就知道了
最后一篇讲海豚辩声
低分库了，555~还是心慌慌的没做好
P1 海豚能辨别自己的声音和神马海浪哟，机器哟的声音
P2 人们train海豚，干嘛干嘛的，不记得了，看不进去，哭！

327356719

感谢楼主

rebecca_wang

楼主别伤心难过，就当花钱做了一回PREP，我也是二战，一战时候看了各种狗最终还悲催了。。。。你能记下来这么多狗，我们都感谢你啊~！攒人品，咱下次大爆发~！

海豚那道越毒狗我找了一些资料，楼主麻烦看看是这不是？

我搜集的一些资料:
海豚识别回声
内容好像有一个是海豚回声定位的  5次
讲海豚如何分辨同类的叫声和水下的杂音。
               
海豚对水里的声音的识别。。排除噪音，识别自己的回音。。。
講海豚如何分辨同類的叫聲和水下的雜音

海豚识别回声

海豚回声定位

1. 说海豚怎样在浅海里区别自己的声音和别的噪声。通过频率，重复的模式，回音的间隔时间等。
记得有一个阅读关于海豚的声纳的

About how dolphins distinguish their own sounds from the others in the ocean
Paragraph 1: 海豚怎样辨别自己的声音让专家觉得很有意思之类。。。因为在海里有很多很多的杂音。还举了一个浅水地方的例子，说海底里有很多小虾子发出的clicks
Paragraph 2: 海豚发出的click trains and whistles seem designed to distinguish their own sounds from the others’. 而且whistles 有很规律性的变法 (unvarying pattern)。实验里面证明了海豚会等到接受了第一个clicks 的echo之后才发出第二个click trains

有海豚那道，不过题目有点怪。

海豚识别回声
           题目有点难

海豚识别回声
           –
           这篇有点难，一开始就出来把我吓死了，虽然本月JJ有看到过，但是花了很多时间还是模模糊糊的，所以记得的不多，我有搜寻过以往的旧JJ，虽然有找到类似的海豚文章，似乎跟这篇不同。

豚利用click和emission來航海，並且能夠區分船隻的噪音，海底其他動物的聲音，同伴的聲音。比如一種蝦，發出的聲音很像是海豚發出的，人類一般不能區別出。[此處有題，答案是海豚對各種聲音的辨別力比人類強。]第二段開始講述海豚具體的辨別聲音的過程，比較複雜，大概是收到聲音後再自己發出聲音，然後通過回音等等來分辨。此處講到海豚的emission是有規律的頻率變化。[有題，問 emission的性質。答案是頻率改變，但是有規律可循，可以預測。]

Echolcation - the location of objects by their echos - is a highly specialized faculty that enables dolphins to explore their environment and search out their prey in a watery world where sight is often of little use. As sound travels four and a half times faster in water than in air, the dolphin's brain must be extremely well adapted in order to make a rapid analysis of the complicated information provided by the echoes.

Although the ability to echolcate has only been proven experimentally for a few odontocete species, the anatomical evidence - the presence of the melon, nasal sacs and specialized skull structures - suggests that all dolphins have this ability.

The dolphin is able to generate sound in the form of clicks, within its nasal sacs, situated behind the melon. The frequency of this click is higher than that of the sounds used for communication and differs between species. The melon acts as a lens which focuses the sound into a narrow beam that is projected in front of the animal.
When the sound strikes an object, some of the energy of the soundwave is reflected back towards the dolphin. It would appear that the panbone in the dolphin's lower jaw receives the echo, and the fatty tissue behind it transmits the sound to the middle e ar and thence to the brain. It has recently been suggested that the teeth of the dolphin, and the mandibular nerve that runs through the jawbone may transmit additional information to the dolphin's brain.
As soon as an echo is received, the dolphin generates another click. The time lapse between click and echo enables the dolphin to evaluate the distance between it and the object; the varying strength of the signal as it is received on the two sides of th e dolphin's head enable it to evaluate direction. By continuously emitting clicks and receiving echoes in this way, the dolphin can track objects and home in on them.
           
The echolocation system of the dolphin is extremely sensitive and complex. Using only its acoustic senses, a bottlenose dolphin can discriminate between practically identical objects which differ by ten per cent or less in volume or surface area. It can do this in a noisy environment, can whistle and echolocate at the same time, and echolocate on near and distant targets simultaneously - feats which leave human sonar experts gasping.

白菜的白

攒人品啦，下次考一定没问题的

Ting2010

LS那个~
海豚我不咋记得了。。。不过应该是低分裤子的，我V才20 。。。。

捉摸了下，好像没有讲echolocation system 神马的。。。555~
对不起不记得了~~

rebecca_wang

没事儿，要是之后想起来啥了再来补充，谢谢你发布的狗狗，bless you~

知行

小叮当 昨天哭的稀里哗啦的时候 还叫着马上要回来放狗 还是我们劝住了 让她回去休息先 不急。。 大清早还是来放了。。。

真是个善良的小丫头！！  一战买个经验！！ 从头再来！！

cutenancymyn

顶~~ LZ要继续加油才是！

BTW 地图颜色那个题 不应该是12么。。。。。

xbx_lee

谁帮我解释下
2     员工有经济学学位的80%和会说法语的40% 每个员工either有学位or会所法语or both 求既会说法语有有学位的人（狗里有）
   确实是求‘the precent of people who have XXX also can speak Frence’
   50%
为什么是50%? 学位交法语不是20%，然后20%/80%不是25%吗？

感谢感谢。

Shine61

谁帮我解释下
2     员工有经济学学位的80%和会说法语的40% 每个员工either有学位or会所法语or both 求既会说法语有有学位的人（狗里有）
   确实是求‘the precent of people who have XXX also can speak Frence’
   50%
为什么是50%? 学位交法语不是20%，然后20%/80%不是25%吗？

感谢感谢。

-- by 会员 xbx_lee (2011/3/2 18:21:34)

What percent of the employees who have Business degree can speak French?
问的是在40%说法语的人里面，那个20%占了百分之几，所以是50%
具体可以看http://forum.chasedream.com/GMAT_Math/thread-522352-1-1.html 里面第28题