在不透明的口袋中，有五个形状、大小、质地完全相同的小球，五个_爱下问搜题

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问题填空题

在不透明的口袋中，有五个形状、大小、质地完全相同的小球，五个小球上分别标有数字-3，-2，-1，0，1．现从口袋中随机取出一个小球，将该小球上的数字记为b，将该数加2记为c，则抛物线y=

1

4

x2+bx+c的顶点落在第四象限的概率是______．

答案

根据题意得：b与c的可能结果有：b=-3，c=-1；b=-2，c=0；b=-1，c=1；b=0，c=2；b=1，c=3；

∵若抛物线y=

1

4

x2+bx+c的顶点落在第四象限，则需b＜0，且b²-4×

1

4

c=b²-c＞0，

∴符合要求的有：b=-3，c=-1；b=-2，c=0；

∴抛物线y=

1

4

x2+bx+c的顶点落在第四象限的概率是：

2

5

．

故答案为：

2

5

．

完形填空

阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出一个可以填入空白处的最佳选项）。
Children find meanings in their old family tales．
When Stephen Guyer’s three children were growing up, he told them stories about how his grandfather, a banker,   1  all in the 1930s, but did not lose sight of what he valued most. In one of the darkest times   2  his strong-minded grandfather was nearly  3  , he loaded his family into the car and   4   them to see family members in Canada with a   5  , “there are more important things in life than money”.
The   6  took on a new meaning recently when Mr. Guyer downsized to  7   house from a more expensive and comfortable one. He was 8     that his children, a daughter, 15, and twins, 22, would be upset．To his surprise, they weren’t. 9     , their reaction echoed (共鸣) their great-grandfather’s．What they 10   was how warm the people were in the house and how 11    of their heart was accessible.
Many parents are finding that family stories have surprising power to help children
  12   hard times. Storytelling experts say the phenomenon reflects a growing   13    in telling tales, evidenced by a rise in storytelling events and festivals.
A university   14   of 65 families with children aged from 14 to 16 found kids’ ability to 15  parents’ stories was linked to a lower rate of anger and anxiety.
The 16  is telling the stories in a way children can 17   . We’re not talking here about the kind of story that 18  , “ When I was a kid, I walked to school every day uphill both ways, barefoot in the snow.” Instead, we should choose a story suited to the child’s 19 , and make eye contact (接触) to create “a personal experience”. We don’t have to tell children 20   they should take from the story and what the moral is.

C．arrangement

C．disappointed

A．talked about

B．cared about

C．wrote about

D．heard about

多项选择题

索罗门分析的造成无力感的根源包括()。

A.受压迫团体的自我负向评价

B.宏观环境的障碍使他们难以在社会中有效行动

C.社会环境中的障碍导致问题的产生

D.受压迫群体与外在环境互动过程中形成的负面经验

E.实现目标受到许多的限制