例4、(04重庆市)在如图的方格纸中,每个小方格都是边长为1的正方形,点A、B是方格纸中的两个格点(即正方形的顶点),在这个5×5的方格纸中,找出格点C使△ABC的面积为2个平方单位,则满足条件的格点C的个数是( )
(A) 5(B)4(C)3(D)2
析解:明确格点的意义,利用平行线间的距离处处相等的知识,找出使△ABC的面积为2个平方单位格点即可,此题答案为(A)。此题考查学生想象能力、发散思维的能力。
例3、(04济南市中考题改编)如图,方格纸上一圆经过(2 , 5)、(2 , -3)两点,且此两点为圆与方格纸横线的切点,则该圆圆心的坐标为( )
A.(2, -1) B.(2, 2)
C.(2, 1) D.(3, 1)
析解:此题充分利用方格纸的特点及圆中的有关性质,利用“圆的两条切线互相平行,则两切点的连线是直径”便可求出圆心的坐标。此题将方格纸与圆、平面直角坐标系联系在一起,新颖而有趣味性。
例2、(04年苏州市)正方形网格中,小格的顶点叫做格点,小华按下列要求作图:
①在正方形网格的三条不同实线上各取一个格点,使其中任意两点不在同一条实线上;
②连结三个格点,使之构成直角三角形,小华在左边的正方形网格中作出了Rt△ABC,请你按照同样的要求,在右边的两个正方形网格中各画出一个直角三角形,并使三个网格中的直角三角形互不全等。
解答:下面给出三种画法:
评注:此题给学生广阔的思维空间,体现数形结合思想,学生可从边或角两个角度探求直角,画出符合要求的直角三角形。本题考查学生发散思维的能力、运用知识解决问题的能力及数形结合思想。
例1、(03年新疆建设兵团)如图是由16个边长为1的正方形拼成的,任意连结这些小正方形的若干个顶点,可得到一些线段,试分别画出一条长度是有理数的线段和一条长度是无理数的线段。
析解:这是一道开放性的试题,形式新颖,依据图形和数学的基本知识寻找符合要求的线段,着意考查学生观察和分析图形的能力,考查学生对于有理数和无理数的理解与认识,可以使学生进一步感受到这些数的真实存在。对长度为无理数的线段,根据方格中蕴含的直角,借助勾股定理即可解决,具体画法略。
第一节 基础写作(共1小题,满分15分)
上周,我们以“谁是你的偶像”为题,在2600名学生中进行了一次调查(survey)。以下是调查数据:
[写作内容]
根据以上数据,写一篇短文,包括以下内容:
1.调查时间、调查问题以及调查对象;
2.男女生在以明星为偶像方面的差异;
3.“父母”在男女生偶像中的排序差异;
4.男女生在以伟人为偶像方面的异同;
5.你的偶像及理由。
[写作要求]
1.只能使用5个句子表达全部内容;
2.文中不能出现真实姓名和学校名称。
[评分标准]
句子结构准确,信息内容完整,篇章结构连贯。
第一节 开放作文(15分)
One possible version:
In this picture, a mother bird stays in her nest in a big tree, watching her babies flying away. I think the mother bird must be very proud of her children, who are able to find their own food now. But she may also feel a sense of loss since they no longer need her day-to day care as they used to. This picture shows very well the mixed feelings of parents when watching their children grow up. For my parents, things will be much easier. We will set up a family blog to post our photos, journals, and even audios. Once I leave for college, we can conveniently share our experiences and support each other no matter where we are. Their “nest” will never be empty.
福建
假设你是林华,福建省某中学高三学生,请你根据以下学生会倡议书的内容给某英文报社写一封信,叙述拟开展活动的内容并发表自己的看法。
注意:1.信的开头语已经给出,不计入总词数;
2.可根据内容要点适当发挥,但不要逐条翻译;
3.词数100左右:
4.参考词汇:增进promote;鼓励节约encourage econonmy
Dear editor,
I am a student of Senior Tree in a middle school in Fujian Province.
Yours sincerely,
Lin Hua
Dear editor,
I am a student of Senior Tree in a middle school in Fujian Province.
In order that we can make the best of learning materials, the Students’Union of our school is arranging an activity. We students of Senfor Three are called on to give away our used books, newspapers or magazines to the students in the lower grades. The idea, which is intendent to promote friendsship and encourage economy, is highly praised and supported by the teachers and students alike. The activity will last about ten days, from June 10 to 20.
As a student, I am strongly for the activity because it is very meaningful and helpful. I hope that this kind of activity will continue in the future.
Yours sincerely,
Lin Hua
广东
Ⅳ 写作(共两节,满分40分)
第二节 开放作文(15分)
请根据下面提示,写一篇短文。词数不少于50.
In your English class, you are asked to describe the following picture and explain to your classmates how you understand it.
Dear Harry,
How are things going?
Last Monday, our class held a monitor election. This was our first election, so everyone was excited. Two of my classmates took par in the race; Liu Dong and Wang Hong. They each gave a speech telling us what they would do when they were elected. Then we voted for the monitor. The result was 28 to 15 in Wang Hong’s favor. Wang Hong because our new monitor. The whole class cheered for her, and she promised to do the best she could for us all.
Best wishes,
Li Hua
安徽
假设你是李华。美国一所友好学校准备与你们学校共同创办一份中学生英文刊物,该校格林先生来信询问有关情况。请你给他写封回信,主要内容如下:
* 表示赞成。
* 提出你喜欢的栏目。
* 简要说明理由。
注意:
1.词数100左右。
2.信的开头和结尾已为你写好。
3.适当增加细节,以使行文连贯。
4.参考词汇:栏目一column
﹡ ﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡﹡ June 8
Dear Mr. Green,
I am very excited to learn that we are going to start a magazine together.________________________________________________________________________________________________________
Yours faithfully
Li Hua
June 8
Dear Mr. Green,
I am very excited to learn that we are going to start a magazine together. It is indeed a wonderful idea and everyone hopes for its success.
I would like the magazine to have three columns : News, Teachers' Advice and Students' Voice. From the News column we can learn about what is going on in both of our schools. In Teachers' Advice, our teachers can give us such help as we may not be able to get in the classroom. Students' Voice will allow us to freely express our thoughts and feelings about our lives and studies.
I believe that this magazine will surely strengthen our ties, and I am looking forward to reading it.
Yours faithfully,
Li Hua
北京
第一节 情景作文(20分)
假设你是李华,要给英国笔友Harry写封信,介绍你班两位同学精选班长的过程。请按下图顺序描述。
注意:1.信的开头已为你写好。
2.词数不少于60.
提示词:竞选班长monitor election
Dear Harry,
How are things going?
Last Monday.(请将情景作文写在答题卡二第一页指定区域内)
Best wishes,
Li HUa
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