问题 选择题
设集合M={x|x=k+
1
2
,k∈Z}
N={x|x=1+
k
2
,k∈Z}
,则(  )
A.M=NB.M⊆NC.N⊆MD.M∩N=φ
答案

由题意,M={x|x=k+

1
2
,k∈Z}={x|x=
2k+1
2
,k∈Z}
,此集合是全体奇数的一半组成的集合;

N={x|x=1+

k
2
,k∈Z}={x|x=
2+k
2
,k∈Z}
,此集合是全体整数的一半组成的集合;

∴x∈M,必有x∈N,而当x∈N时不一定有x∈M,

综上知M⊆N

故选B

写作题

读写任务

阅读下面的短文, 然后按照要求写一篇150词左右的英语短文。

     The New Year is a holiday for many people. It is a day of leisure and celebrations. But for a lot of others it is a normal working day-they have to toil for the rest to celebrate. Many of the workers, small business/people, bus and train drivers and dispatchers work so that we can enjoy our holidays.

     Most of our dreams are realized on the hard work of others. Their contributions add fresh colors to

society. That’s the reality of life. But society does not belong to the great and the successful alone. It belongs to those whose struggle never ceases.

     Their condition may not change much in the New Year. Their achievements, even their existence, may

not be acknowledged.

     But we firmly believe they will never cease to move forward. There should be happiness in the lives of

all.

     Therefore, we solemnly send our New Year greetings to them, to the common folks whose struggle for a better life never ceases.

     They are humble, but it is their joint endeavor that propels society forward. They may not share the

wealth and power they so richly deserve, but their position in society can never be disputed.

     May they find happiness in the New Year.

【写作内容】

1. 以约30个词概括短文内容要点;

2. 然后以约120个词就“如何为社会做贡献”这个主题发表你的看法, 内容包括:

(1)作为高三的学生如何服务社会;

(2)以亲身经历或他人的事例说明人人都能对社会有所贡献;

(3)自己对未来的设想。

【写作要求】

1. 作文中可使用自己的亲身经历或虚构的故事, 也可以参照阅读材料的内容但不得直接引用原文中的句子;

2. 文中不能出现真实姓名和学校名称。

【评分标准】

概括准确, 语言规范, 内容合适, 篇章结构连贯。

________________________________________________________________________

________________________________________________________________________

________________________________________________________________________

________________________________________________________________________

单项选择题