【题目】2016年6月25日20时00分07秒，长征七号运载火箭从海南文昌航天发射中心首次发射，成功将载荷送入预定轨道，任务取得圆满成功。如图所示，长征七号多级火箭发射时，第一级火箭点火后，使卫星向上匀加速运动的加速度为50 m/s2，燃烧30 s后第一级脱离，第二级火箭没有马上点火，所以卫星向上做加速度为10 m/s2的匀减速运动，10 s后第二级火箭启动，卫星向上的加速度为80 m/s2，这样经过1分半钟第二级火箭脱离时，卫星的速度多大？
请你用v-t图象描述这一过程。
科目：高中地理 来源： 题型：
【题目】 短文改错
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下画一横线，并在该词下面写出修改后的词。
注意：
1. 每处错误及其修改均仅限一词；
2. 只允许修改10处，多者(从第11处起)不计分。
Which is known to all, nowadays the Internet is playing more and more important part in our daily life. In it, we can not only read news at home and abroad but also get so much information as possible. We are often send e-mails to our classmates. We can make telephone call to our families as well as our friends. However, we can go to school on the net, read different kinds of books and even teach myself English. We can also enjoy music, watching sports and play computer games on the Net. We could do shopping even without leaving our homes.
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科目：高中地理 来源： 题型：
【题目】B
Katharine Graham, once described as ＂the most powerful woman in America＂, was the owner and publisher of The Washington Post newspaper. Under her leadership, it became one of the most important newspapers in the country.
Katharine Graham was born in New York in 1917. Graduating from the University of Chicago in 1938, Katherine got a job as a reporter for a newspaper in San Francisco, California. In 1933, Katharine’s father bought a failing newspaper, The Washington Post. It was the least successful of five newspapers in Washington.
Soon Katharine returned to Washington and got a job editing letters to the editor of her father’s newspaper. In 1946, her husband Philip Graham became publisher of The Washington Post. When she was 46, her husband died, leaving Katharine Graham four children to raise and a newspaper to operate.
At first, she was concerned only with finding a way to keep control of The Washington Post until her sons were old enough to lead it. She had no training in business or experience in operating a large company and decided to learn. She hired excellent reporters and editors. In 1969, Missus Graham became publisher as well as president of The Washington Post company. In the 1970s, The Washington Post became famous around the world. Katharine Graham also played an important role in supporting women by employing more of them. When she was eighty years old, Katharine Graham wrote a very popular book called Personal History about her life, which won a Pulitzer prize for biography in 1998. Friends of Katharine Graham said she used her intelligence and bravery to improve the American media.
【1】 Katharine Graham first worked as ___________.
A. a reporter B. an editor
C. a publisher D. a manager
【2】 When Katharine’s father bought The Washington Post, __________.
A. it had been in business for a short time
B. it was one of the largest newspapers in the US
C. it was in a difficult situation
D. it had enjoyed great success and fame
【3】The most difficult time for Katharine came when __________.
A. her father died
B. her husband died
C. she took control of The Washington Post
D. she returned home to raise her four kids
【4】What can we infer from the passage?
A. The newspaper was failing under Katharine’s control.
B. There were more women editors than men editors in The Washington Post.
C. Katharine probably had a difficult time operating the newspaper at first.
D. Katharine was best known for her book Personal History.
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科目：高中地理 来源： 题型：
【题目】短文改错
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏词符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：
1. 每处错误及其修改均仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分。
Dear friends,
It is real a good chance to have met all of you here. We have spent several precious weekend in learning in the English Club. Although we have been members for a short period of times, we have made a great progress. That is because we are all very actively and the activities are not only enjoyable and also helpful. Besides, the foreign teachers here work hard and try his best to make the activities lively and interested. I am very pleased to say that all of us greatly improved our spoken English so far. I am looking forward to see all of you again in the near future!
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科目：高中地理 来源： 题型：
【题目】目前有些居民区内楼道灯的控制，使用的是一种延时开关。该延时开关的简化原理如图所示。图中D是红色发光二极管（只要有很小的电流通过就能使其发出红色亮光），R为限流电阻，K为按钮式开关，虚线框内S表示延时开关电路，当按下K接通电路瞬间，延时开关触发，相当于S闭合，这时释放K后，延时开关S约在1 min后断开，电灯熄灭。根据上述信息和原理图，我们可推断：
按钮开关K按下前，发光二极管是________（填“发光的”或“熄灭的”），按钮开关K按下再释放后，电灯L发光持续时间约________min。这一过程中发光二极管是________。限流电阻R的阻值和灯丝电阻RL相比，应满足R________RL的条件。
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科目：高中地理 来源： 题型：
【题目】两物块A、B用轻弹簧相连，质量均为2 kg，初始时弹簧处于原长，A、B两物块都以v＝6 m/s的速度在光滑的水平地面上运动，质量4 kg的物块C静止在前方，如图所示．B与C碰撞后二者会粘在一起运动．则在以后的运动中：
（1）当弹簧的弹性势能最大时，物块A的速度为多大？
（2）系统中弹性势能的最大值是多少？
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【题目】右图所示的实验装置验证m1、m2组成的系统机械能守恒．m2从高处由静止开始下落，m1上拖着的纸带打出一系列的点，对纸带上的点迹进行测量，即可验证机械能守恒定律．如图给出的是实验中获取的一条纸带：0是打下的第一个点，每相邻两计数点间还有4个点（图中未标出），计数点间的距离如图所示．已知m1＝50 g、m2＝150 g，则（结果均保留两位有效数字）
（1）在纸带上打下计数点5时的速度v＝______m/s；
（2）在打下第“0”到打下第“5”点的过程中系统动能的增量ΔEk＝________ J，系统势能的减少量ΔEp＝______J；（取当地的重力加速度g＝10 m/s2）
（3）若某同学作出
v2－h图象如图所示，则当地的重力加速度g＝________m/s2.
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科目：高中地理 来源： 题型：
【题目】如图，水平正对放置的两块足够大的矩形金属板，分别与一恒压直流电源（图中未画出）的两极相连，M、N是两极板的中心。若把一带电微粒在两板之间a点从静止释放，微粒将恰好保持静止。现将两板绕过M、N且垂直于纸面的轴逆时针旋转一个小角度θ后，再由a点从静止释放一这样的微粒，该微粒将
A．仍然保持静止
B．靠近电势较低的电极板
C．以a=g(1–cos θ)的竖直加速度加速（g表示重力加速度）
D．以
的水平加速度加速（g表示重力加速度）
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