学进去-教育应平等而普惠
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如图1,在平面直角坐标系中,点A的坐标为,点B的坐标为,点P是射线上的动点.

(1)填空:的长是_________,的长是_________;
(2)当平分时,求的长;
(3)当时,直接写出的长为_________;
(4)将沿折叠,点B落在处,当轴时,直线x轴于点M,直线直线于点N,直接写出线段的长为_________.
类型:解答题
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Success is often considered to be the opposite of failure. To teenagers, it is the achievement of a goal or completion of something they really need, such as good grades and the ability to get along well with their classmates. Some schools used to agree with most parents who measured (判定) the success of their children according to grades, but now they pay special attention to moral (道德的) education and character-building to make sure teenagers achieve success in building human relationships.

Schools give chances to students to discover their hidden ability so that they can enjoy some form of success. For example, those good at speaking skills are advised to take part in speech competitions while those interested in arts are expected to perform in front of their classmates. Teenagers also get the pleasure of success when they join their favorite clubs.

Teenagers are often told that success is not easy to achieve and that success lies in hard work. Great efforts have to be put into project work. Doing things much later than planned should be avoided as this will lead to a mountain of work which finally makes them nervous. Another good quality (品质) is a sense of responsibility which makes them remember that a task has to be completed.

Sticking to moral values is the key to success too. Honest teenagers will win the trust of friends leading to good relationships. Self-motivation (自我激励) is another quality to be developed, for self-motivated teenagers will have the strong will and drive to perform a task and finally get to enjoy a sense of achievement.

1.What does the underlined word “they” in Paragraph 1 refer to (指代)?
A.Their classmates.B.Some schools.C.Most parents.D.Their children.
2.Why are students given chances to take part in activities?
A.To get good grades.B.To improve speaking ability.
C.To express their love for arts.D.To get the pleasure of success.
3.What can we learn from Paragraph 3?
A.Project work makes teenagers nervous.
B.Good qualities will lead to a happy life.
C.Teenagers are advised to complete tasks in time.
D.Taking responsibility will make work much easier.
4.What is important for making students strong minded?
A.Honesty.B.Self-motivation.C.Communication.D.Friends’ trust.
5.What can be the best title for the text?
A.The Value of Moral EducationB.The Key to Discovering Hidden Ability
C.The Meaning of Success to TeenagersD.The Way to Communicate with Others
类型:阅读单选
难度系数:困难0.15
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B)综合填空。阅读下面短文,在空白处填入一个适当的词或填入括号中所给单词的正确形式。

The Spring Festival is the most important festival in China. In order to celebrate this festival, people do a lot of things, such as 1. the whole house, posting couplets, visiting friends and 2., and so on. Setting off firecrackers is one of the most important activities. Do you know why?

This is a story about Nian. Once 3. a time, there was a bad monster 4. Nian. On the Eve of the New Year, Nian would come up from sea and eat the villagers. People were so 5. that they would stay at home. One Spring Festival’s Eve, the monster came again. The villagers hid in 6. houses. The monster went to the first house. Suddenly they heard a loud noise: BANG! BANG! BANG! The noise frightened the monster. It saw fire and red paper around the door. It quickly ran 7..

The villagers went to the first house. The people in the first house told them 8. Nian was afraid of red, light and thunder (雷声). So 9. it saw the red paper and the lights and heard the firecrackers, it just ran away.

Since then, people get together and have a family reunion (团圆饭) on New Year’s Eve. They put red couplets on the door, wear red clothes, set off firecrackers and keep the house bright for 10. whole night.

类型:短文语境提示填空
难度系数:困难0.15
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图甲是某电子秤工作原理的模拟电路。用灵敏电流表显示托盘内物体的质量,灵敏电流表量程是0∼0.1A,定值电阻R1=50Ω,电源电压恒为12V。压敏电阻R2相当于压力传感器,其电阻大小与托盘内所放物体质量m大小的关系如下表:

R2

550

487

428

370

310

250

200

150

100

70

40

20

m/g

0

100

200

300

400

500

600

700

800

900

1000

1100

求:
(1)闭合开关,托盘中不放物体时,电路中的电流;
(2)这架电子秤能称量的最大质量;
(3)装有液体的烧杯放在电子秤托盘上,质量显示为500g;现用细线悬挂一个体积为2.5×10-4m3的金属块浸没在液体中,如图乙所示,稳定时质量显示为700g。求金属块受到的浮力和液体的密度。
   
类型:计算题
难度系数:困难0.15
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如图甲所示,已知电流表的量程为,电压表的量程为,滑动变阻器的规格为“”。闭合开关S后,调节滑动变阻器的滑片P,得到电流表与电压表的示数关系如图乙所示。在保证电路安全的前提下,下列说法中正确的是(  )
   
A.电源电压为9V
B.的阻值为
C.滑动变阻器的取值范围是
D.电路总功率的变化范围是
类型:单选题
难度系数:困难0.15
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取一定质量的CaCO3固体高温加热一段时间后,冷却,测得剩余固体的质量为8.0g,其中,钙元素质量分数为50.0%。下列判断正确的是
A.原来CaCO3的质量为14.5gB.剩余8.0g固体为纯净物
C.生成4.4gCO2气体D.剩余8.0g固体中加入稀盐酸有气泡产生
类型:单选题
难度系数:困难0.15
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【性质探究】
如图,在矩形ABCD中,对角线ACBD相交于点OAE平分∠BAC,交BC于点E.作DFAE于点H,分别交ABAC于点FG
(1)判断△AFG的形状并说明理由.
(2)求证:BF=2OG
【迁移应用】
(3)记△DGO的面积为S1,△DBF的面积为S2,当时,求的值.
【拓展延伸】
(4)若DF交射线AB于点F,【性质探究】中的其余条件不变,连结EF,当△BEF的面积为矩形ABCD面积的时,请直接写出tan∠BAE的值.
类型:解答题
难度系数:困难0.15
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已知抛物线yax2+bx+c经过A(2,0),B(3n﹣4,y1),C(5n+6,y2)三点,对称轴是直线x=1.关于x的方程ax2+bx+cx有两个相等的实数根.
(1)求抛物线的解析式;
(2)若n<﹣5,试比较y1y2的大小;
(3)若BC两点在直线x=1的两侧,且y1y2,求n的取值范围.
类型:解答题
难度系数:困难0.15
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抛物线轴交于两点(点在点左侧),与轴负半轴交于点
   
(1)如图1,当时,连接,试判断的形状,并求的面积;
(2)在(1)的条件下,为抛物线上一点(点不与三点重合),且,求点的坐标;
(3)如图2,当时,点之间抛物线上任意一点(点不与重合),直线分别交轴于两点,点在运动过程中,是否存在固定的值,使成立,若存在求出值,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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下列图象能正确反映对应变化关系的是
A.用等质量、等浓度的双氧水分别制取氧气B. 加热一定量的高锰酸钾固体C.碳在盛有氧气的密闭集气瓶内燃烧D. 将水通电,电解一段时间
A.AB.BC.CD.D
类型:单选题
难度系数:困难0.15
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