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问题 解答题
某市为了推动全民健身运动在全市的广泛开展，该市电视台开办了健身竞技类栏目《健身大闯关》，规定参赛者单人闯关，参赛者之间相互没有影响，通过关卡者即可获奖．现有甲、乙、丙3人参加当天的闯关比赛，已知甲获奖的概率为
3
5
，乙获奖的概率为
2
3
，丙获奖而甲没有获奖的概率为
1
5
．
（1）求三人中恰有一人获奖的概率；
（2）记三人中至少有两人获奖的概率．
答案

（1）设甲获奖为事件A，乙获奖为事件B，丙获奖为事件C，三人中恰有一人获奖为事件E，丙获奖的概率为p，

则P（C）p（

.
A
）=
1
5
，即p（1-
3
5
）=
1
5
，

解可得，p=

1
2
，

三人中恰有一人获奖的概率P（E）=P（A•

.
B
•
.
C
）+P（
.
A
•B•
.
C
）+P（
.
A
•
.
B
•C）=
3
10
；

答三人中恰有一人获奖的概率为

3
10
；

（2）记三人中没有一人获奖为事件F，三人中至少有两人获奖为事件G，

P（F）=P（

.
A
•
.
B
•
.
C
）=（1-
3
5
）（1-
2
3
）（1-
1
2
）=
1
15
，

P（G）=1-P（E）-P（F）=1-

1
15
-
3
10
=
19
30
；

答三人中至少有两人获奖的概率为

19
30
．

阅读理解
根据短文内容，从下框的A-F选项中选出能概括每一段主题的最佳选项。选项中有一项
为多余选项。
A. Establish your independence as early as possible.
B. Remember that your mind is yours alone.
C. Learn to work with your parents.
D. Identify your fear factor.
E. Learn how to avoid being controlled by anger.
F. Ask yourself if your parent is a perfectionist.
   1.________
   Often a controlling parent is a perfectionist, driving you always to be the best you can and getting angry
or upset over grades that are less perfect, no matter how hard you work for them, or finding faults with
tasks you take on around the home. There is nothing wrong with doing a job right, but it seems like no
matter how hard you work on it, it's never perfect. In other words, do you ever just receive praise from
that parent, or is it always justified with a "but..." or "except...".
   2. ________
   It can only be controlled if you allow it to be. Controlling behaviours are eventually the controller's
attempt to meet his or her own needs. If the controlling parent demands good grades, don't do poorly.
You are the strong one when you find ways to meet his or her needs and yours, without allowing them
to get into your mind. They can force you to pretend to be something you are not, but they can't change
who you actually are.
   3.________
   Most controlling parents are simply afraid that you will fail without their intervention. Because they feel it necessary to involve themselves in your life. If you can discover what seems to calm your parents, you will make your own life much easier. For example, if a note from your teacher telling them you haven't turned
in your homework will put you into trouble, do turn in the homework. It's pretty simple but really-do what your parents want you to do, and they will be less intrusive in your life.
   4.________
   Some parents control their family with anger. They really lose their temper, lose all self-control, and the
result is no discussion. People are afraid to voice an opinion contrary to the angry parents because they
fear what will happen. This is how anger is used to control you. If you can talk to the parents, ask for the 3-minute-rule approach. Using this approach allows everyone to be heard and also provides some
"cooling off" time, which can help manage conflicts.
   5.________
   If you are very smart, you will study hard in school and give yourself lots of opinions for change. Even
if you go to school locally, it's suggested that you try to live in the dormitories, or any place other than
your parents' home. Get a job and help with your own living expenses. The sooner you get out form
under the shadow of a controlling parent, the sooner the parent will recognize you "Declaration of
Independence".
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单项选择题

通过以下哪种方式可以最好地防止拥有充分技术的人员绕过安全程序对生产程序进行修改？（）

A.对已完成工作的报告进行检查。

B.将生产程序与独立控制的拷贝进行比较。

C.定期运行测试数据。

D.制定合适的职责分离。
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