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

Boldface

Scientists typically do their most creative work before the age of forty.  It is commonly thought that this happens because aging by itself brings about a loss of creative capacity.  However, studies show that a disproportionately large number of the scientists who produce highly creative work beyond the age of forty entered their field at an older age than is usual.  Since by the age of forty the large majority of scientists have been working in their field for at least fifteen years, the studies’ finding strongly suggests that the real reason why scientists over forty rarely produce highly creative work is not that they have simply aged but rather that they generally have spent too long in a given field.

定义一个国家的economy是它的总产值。事实一是某国98％可能就业的人数已就业，并且不会有变化。事实二是该国生产力也不会有变化。结论是该国的economy不会变。如何support这个结论？

radar 测距仪可以减小追尾事故，为此政府决定在车上装radar 测距仪，问assuption.

 In 1981 children in the United States spent an average of slightly less than two and a half hours a week doing household chores; by 1997 they had spent nearly six

hours a week.

A.     chores; by 1997 they had spent nearly six hours a week

B.     chores; by 1997 that figure had grown to nearly six hours a week

C.     chores, whereas nearly six hours a week were spent in 1997

D.     chores, compared with a figure of nearly six hours a week in 1997

chores, that figure growing to nearly six hours a week in 1997

RC

电力公司

宇宙起源

pricing strategy

N=p+q+r，p，q，r是连续自然数；N=x*y*z，x，y，z也是连续自然数

问N除以5余几？

1）p 除以5余1

2）x 除以5余1

以下为JJ：

直角三角形三边 n<=m<=k area=1 问m的范围.

两排数第一排是 x1,x2,...., x10,第二排是第一排数除2的余数,问第2排数的和?1) 第一排树和是100 2) 第二排有6个even.

集合{r,s,t,u,w}, 问这个集合有多少个不含t 的子集。我选16。这题的例子很怪,{r,s,t}有三元素,却有7个子集,承包包括{r,s,t}, {},3个元素集合, 但只有2个双元素集合。

DS:一个立体的图形.base是等腰直角三角形的。侧面是长方形，长方形的对角线和边的夹角是60度。问整个立体图形的表面积和? (1) 已知长方形对角线的长度20根号3 (2) 知道直角三角形的area 225

if x>0, the expression is 0; if x<0 the expression is X平方

ds:c+d/c-d=c-d/c+d, 问c=？1） d不等于O,2)whatever

问一个数列的方差是多少？（1）mean等于该数列的最大数（2）range=0

哪个一定大于X，我选X平方+1

D是不是》=-1

1）D是D， 1/D，-D 中数；2）D是 D， D^2，D^3中数