问题 解答题

将正面分别标有数字1、2、3、4、6,背面花色相同的五张卡片洗匀后,背面朝上放在桌面上,从中随机抽取两张。

(1)写出所有机会均等的结果,并求抽出的两张卡片上的数字之和为偶数的概率;

(2)记抽得的两张卡片的数字为(a,b),求点P(a,b),在直线y=x-2上的概率。

答案

解:(1)任取两张卡片共有10种取法,它们是:(1、2),(1、3),(1、4),(1、6),(2、3),(2、4),(2、6),(3、4),(3、6),(4、6);和为偶数的共有四种情况,

故所求概率为

(2)抽得的两个数字分别作为点P横、纵坐标共有20种机会均等的结果,在直线y=x-2上的只有(3、1),(4、2),(6、4)三种情况,

故所求概率

阅读理解

阅读表达。

    Happiness is for everyone. (A) You don't always need to care about the rich. Though they have beautiful

houses with large gardens and swimming pools, they may often feel lonely In fact, happiness is always

around you if you put your heart into it. (B) When you don't pass the exam at school, your teachers will give

you a hand.

    When you do something wrong, people around you will feel unhappy. When you succeed in something,

your friends will say (C) congratulations to you. All of these are your happiness. If you notice (D)some of

these things, you can see happiness is always around you.

    Happiness is not the same as money.It is a feeling of your heart. (E) 虽然你贫穷,但你也可以说你很幸福。Money is not everything. You have something else that money can't buy. When you meet difficulties,

you can loudly say you are very happy because you have more chances to challenge yourself so you can not

always say you are poor and you have bad luck If you take every chance you get, you can be a happy and

lucky person.

阅读上面的短文,按要求答题。

1. 将划线部分(A)处翻译成汉语。

    ______________________________________________________________

2. 将划线部分(B)处改为同义句。

    ______________________________________________________________

3. 划线部分(C)处的中文意思是______________

A.“加油” B.“祝贺” C.“倒霉” D.“太棒了”

4. 与划线部分(D)处意思相同的词语是_______________

    A.many of  B.one of  C.a few of  D.any of

5. 将划线部分(E)处的汉语翻译成英语。

    ______________________________________________________________

单项选择题 A型题