学进去-教育应平等而普惠
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抛物线yx2-4x与直线yx交于原点O和点B,与x轴交于另一点A,顶点为D

(1)直接写出点B和点D的坐标;
(2)如图1,连接ODPx轴上的动点,当tan∠PDO时,求点P的坐标;
(3)如图2,M是点B关于抛物线对称轴的对称点,Q是抛物线上的动点,它的横坐标为m(0<m<5),连接MQBQMQ与直线OB交于点E.设△BEQ和△BEM的面积分别为S1S2,求的最大值.
类型:解答题
难度系数:困难0.15
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如图,边长一定的正方形ABCDQCD上一个动点,AQBD于点M,过MMNAQBC于点N,作NPBD于点P,连接NQ,下列结论:①AMMN;②MPBD;③BNDQNQ;④为定值,其中正确的结论个数是(       

A.1B.2C.3D.4
类型:单选题
难度系数:困难0.15
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中,为平面上一动点,且,将绕点顺时针旋转,连接

(1)如图1,点左上方,且,则      °,      
(2)如图2,当点A内部且ABE三点在一条直线上时,求的长度;
(3)当的面积正整数时,求出满足条件的点D的个数.
类型:解答题
难度系数:困难0.15
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已知,如图,直线轴、轴相交于点、点,点的坐标为,点的坐标为,抛物线经过点

(1)                       
(2)延长至点,作的平分线,两条角平分线相交于点,求的值;
(3)在(2)的条件下,在抛物线的对称轴上是否存在点,使得,若存在,求出点的坐标,若不存在,请说明理由.
类型:解答题
难度系数:困难0.15
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如图,直线yx+4与x轴交于点C,与y轴交于点B,抛物线yax2xc经过BC两点.

(1)求抛物线的解析式;
(2)如图,点E是直线BC上方抛物线上的一动点,当△BEC面积最大时,请求出点E的坐标;
(3)在(2)的结论下,过点Ey轴的平行线交直线BC于点M,连接AM,点Q是抛物线对称轴上的动点,在抛物线上是否存在点P,使得以PQAM为顶点的四边形是平行四边形?如果存在,请直接写出点P的坐标;如果不存在,请说明理由.
类型:解答题
难度系数:困难0.15
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China is widely known for its ancient civilisation (文明) which has continued all the way through into modern times, in the fact of many ups and downs in its history. There are many reasons, why this has been possible, but one of the main factors has been the Chinese writing system.

At the beginning, written Chinese was a picture based language. It dates back several thousand years to the use of longgu-animal bones and shells on which marks were cared (雕刻) by ancient Chinese people. In ancient China, characters began as simple drawings of natural objects—trees, rivers, mountains and hill, horses and oxen, human beings themselves, etc. The earliest character-like drawings are “pictographic” in quality. Compared with other scripts (字体) in the world, Chinese characters appeared much earlier with the first evidence of the characters around 5, 000 or more years old. More than 50 kinds of carved marks appeared around the Banpo Site and other nearby places. They were shaped and ordered in a certain rule and they have the same characteristics as today’s simple characters—scientists judge them to be the original Chinese characters.

By the Shang Dynasty (around 1600—1046 BCE), these marks had become a well-developed writing system. Over the years, the systems developed into different forms, as it was a time when people were divided geographically, leading to many kinds of dialects (方言) and characters. This, however, changed under Emperor Qin Shi Huang of the Qin Dynasty (221—207 BCE).

Emperor Qin Shi Huang united the six major states into one country where the Chinese writing system began to develop in one direction. That writing method was of great importance in uniting the Chinese people and culture.

Written Chinese has also become an important means by which China’s present is connected with its past. People in modern times can read the classic works which were written by Chinese in ancient times. Chinese character, therefore, is a bridge between the present and the past.

Today, the Chinese writing system is still an important part of Chinese culture. As China plays a greater role in the world, an increasing number of international students are beginning to show their love to China’s culture and history through this amazing language.

1.What is the purpose of the first paragraph?
A.To present ancient Chinese civilization.B.To explain the reasons for ups and downs.
C.To show the importance of Chinese writing.D.To introduce the civilization in modern times.
2.Why did the writing system develop into different forms in ancient times?
A.Because it was a picture-based language.B.Because it was in different animal bones.
C.Because Emperor Qin Shi Huang changed it.D.Because people were geographically divided.
3.The word “uniting” in Paragraph 4 probably means “________”.
A.separating and becoming different groupsB.guiding and helping to the one direction
C.dividing the writing systemD.joining and getting together to make one
4.How did Chinese writing develop?
A.From picture-based language to different writing systems to united system.
B.From simple characters to simple drawing rules to different writing forms.
C.From colorful carved marks to different characters to simple object drawings.
D.From simple writing rule to different scripts to well-developed writing system.
类型:阅读理解
难度系数:困难0.15
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阅读短文,根据短文内容回答问题。

Learn to Love Yourself

Do you ever compare yourself to other people and wish you could be more like them? We are all different in our own way. Self-acceptance (自我接纳) can help you feel happier and better about yourself.

What is self-acceptance?

Self-acceptance means learning to accept the things that make you who you are. As well as being thankful for what you’re good at, like sports, science or singing in the school choir, self-acceptance also means valuing (重视) the parts of you that don’t shine very brightly, like being forgetful or untidy. A 12-year-old girl, Lily, says self-acceptance means “knowing your own weaknesses and strengths (强项), and accepting who you are no matter what other people say or think.”

Why is self-acceptance good for you?

When you accept who you are, you worry less about things you can’t change. This makes you feel happier and more confident (自信的). The Anna Freud Centre, a charity (慈善机构) that helps young people, says everyone can feel that they have to be perfect, but that makes us forget about the little things that make us special, because we’re so busy trying to meet someone else’s standards. Learning to accept everything about yourself can also help you find what you’re really good at. For example, some people may find letters or numbers hard to read, but they might have strengths in other things, like finding good ways to work out problems.

_________________

Start by making a list of all the things you like about yourself. Maybe you’re good at cooking, or people find it easy to talk to you. Also, try saying kind, happy things to yourself in a mirror (镜子) every morning. Think up ways to treat yourself, such as taking a long bath, watching your favorite film, or eating delicious ice-cream. But don’t forget it’s important to eat healthy food and get enough sleep.

1.Does self-acceptance help us feel happier?
_______________________________________
2.In Lily’s mind, what does self-acceptance mean?
_______________________________________
3.What are the advantages of self-acceptance?
_______________________________________
4.What can you write on the line?
_______________________________________
类型:任务型阅读
难度系数:困难0.15
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某化学兴趣小组做完酸碱盐实验后,得到硫酸和硫酸铜混合溶液100g,为达到排放的标准,现用150g氢氧化钠溶液分6次加入混合溶液中,得到的实验数据如下:
实验次数123456
加入氢氧化钠溶液的质量/g252525252525
反应后溶液的质量/g125a170.1190.2210.3235.3
(1)表格中“a”的值是_____________g。
(2)计算所加氢氧化钠溶液的溶质质量分数。
类型:计算题
难度系数:困难0.15
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环渤海地区成为高新技术产业聚集地,有着得天独厚的发展优势。左图为环渤海地区示意图,右图为京津冀地区各类高新技术企业数量占比统计图。读图,完成下面小题。

1.区域内连接辽中南工业基地和京津唐工业基地的铁路线是(     
A.京哈线B.京广线C.京沪线D.京九线
2.京津冀地区中高新技术企业数量占比最多的是(     
A.计算机及办公设备制造业B.信息化学品制造业
C.航空、航天器及设备制造业D.电子及通讯设备制造业
3.京津冀地区高新技术产业发展迅猛的原因是(     
①高等学府众多,科研人才密集②基础设施完善,政府政策支持
③人口城市密集,多廉价劳动力④矿产资源丰富,重工业发达
A.①②B.②③C.①④D.②④
4.下列属于高新技术在生活中应用的是(     
A.卫星监测禾苗长势B.智能育秧技术C.纳米面料服装D.“天眼”射电望远镜
类型:选择题
难度系数:困难0.15
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青春,用汗水书写难忘的故事;青春,用泪水记录成长的悲欢;青春,用创造见证生命的喜悦!小闽所在班级开展“拥抱青春”主题探究活动,现请你参与。

【青春的邀约】进入初中后,小崔同学成为学校辩论队的一员。因为总能提出独到的见解,老师对他赞不绝口。逐渐地,小崔听到别人任何观点都要反驳两句,还认为别人都很笨。同学们对他颇有怨言,小崔却标榜自己有主见。

(1)小崔听到别人任何观点都要反驳,你认为这是批判性思维吗?请你根据所学知识谈谈批判性思维的表现。

【青春的情绪】语文考试时,小冲因为紧张导致许多原本会做的题目做不出来,一怒之下,他把试卷撕了,哭着离开考场。之后的几天他吃不下饭、睡不着觉,精神恍惚,生病了。

(2)概括小冲上述情绪的危害并为他提供调节情绪的两种方法。

【青春的创造】相传,鲁班有一次上山砍柴,被野草割伤,他通过观察、联想,发明了锯子。鲁班从小就参加劳动,在长期劳动中,他还发明了刨子、曲尺、墨斗等工具。他发明的每一件工具,都是在生产实践中得到启发,经过反复研究、试验创造出来的。

(3)上述故事对我们开发创造潜力有着怎样的启示?
类型:分析说明题
难度系数:困难0.15
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