Math
1) 6个字母里面取3个排列，排列顺序固定，一共几种排法

2) 5女3男取3人，至少一男的概率

3) X^2/|X|

4) 上下两个等腰直角三角形围成的三棱柱，好像已知等腰直角三角形斜边所在棱柱表面对角线和斜边夹角
  求棱柱表面积
a等腰直角三角形斜边所在棱柱表面对角线长
b等腰直角三角形面积

5) 求数列标准差
a平均值等于最大值
b Range=0

6) N>1, N是质数吗？
a N的所有因子>根号N
b N的所有因子>N/2

7) 感觉还有至少两道题目问某个四位数，不能被如2，3，5，7，11，13 等数中的某个除。感觉只要把这个数分解成质数相乘的形式就很容易了

8) X Y Z 三点在一条线上，Z 在XY中间，W是另外一点，XW=WY, 问下面哪个一定正确
好像是WX>WZ

9) 某个两位数是个位数的六倍，问这个数
a 个位+十位是两位数
b 十位数是4

10) 某个轮胎用多久报废？已知一共可以转56000mile(好像)
a 给出一个数，是每小时多少mile
b 轮胎半径

RC
1 Skimming and Penetration
2 Seals
3 Aangan 印度女作家
4 Study of sourth urban Native American

CR
People who have spent a lot of time in contact with animals often develop animal-induced allergies, some of them quite serious. In a survey of current employees in major zoos, about 30 percent had animal-induced allergies. Based on this sample, experts conclude that among members of the general population who have spent a similarly large amount of time in close contact with animals, the percentage with animal-induced allergies is not 30 percent but substantially more. 

Which of the following, if true, provides the strongest grounds for the experts’ conclusion?
A.    A zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation.
B.     A zoo employee is more likely than a person in the general population to keep one or more animal pets at home
C.     The percentage of the general population whose level of exposure to animals matches that of a zoo employee is quite small.
D.    Exposure to domestic pets is, on the whole, less likely to cause animal-induced allergy than exposure to many of the animals kept in zoos.
E.     Zoo employees seldom wear protective gear when they handle animals in their care.

In 1960’s studies of rats, scientists found that crowding increases the number of attacks among the animals significantly. But in recent experiments in which Rhesus monkeys were placed in crowded conditions, although there was an increase in instances of “coping” behavior – such as submissive gestures and avoidance of dominant individuals – attacks did not become any more frequent. Therefore it is not likely that, for any species of monkey, crowding increases aggression as significantly as was seen in rats.

Which of the following, if true, most strengthens the argument?
A: All the observed forms of coping behavior can be found among rhesus monkeys living in uncrowded conditions.
B: In the studies of rats, nondominant individuals were found to increasingly avoid dominant individuals when the animals were in crowded conditions.
C: Rhesus monkeys respond with aggression to a wider range of stimuli than any other monkeys do.
D: Some individual monkeys in the experiment were involved in significantly more attacks than the other monkeys were.
E: Some of the coping behavior displayed by rhesus monkeys is similar to behavior rhesus monkeys use to bring to an end an attack that has begun.