September 21,2050-At a press conference today it was announced that the first tourist heading

for Mars will be the 38一year—old US businessman Patrick Clifford. He will leave the earth in the launching window of June 2052 and set his foot on the surface of Mars in November, together with the other 6 astronauts assigned for the mission to further explore the planet.

    Patrick has now two years of training ahead of him to get ready for the trip. Not only will he

 spend five month8 in getting to Mars, but another 600 days there before he can go back home.

Patrick was of course Very excited,。‘This has been my dream since l was four, and seeing the 6rst

 man on Mars 20 years ago made me realize that it was possible.’’

    To be able to pay the$1.3 billion for his ticket for the trip, Patrick sold his majority stake（股

份）in the company his father had built.“I know that my father would have been proud of me if he had still been alive today, he knew what this means to me”, says Patrick. There is no risk, though, that you will find Patrick begging in Your street comer when he comes back, but it is said that he was paid twice as much for his pan of the company.

      So, how is he going to spend his 600 days on the red planet? "Well, since I don't have a job when I get back after selling the company, I have plenty of time. to come up with a new business idea", he says and laughs. If he brings a tool, he can start building the first hotel there, but maybe he shouldn't expect too many guests until someone can offer a cheaper ticket.  

24.Patrick Clifford will go to Mars          ．

    A. on business                                            B. for pleasure

    C. to build a hotel                                     D. to explore the planet

 25.How long will Patrick Clifford be away before he comes back?

    A. About five months.                                   B. About two years.

       C. About 750 days.                                    D. About 600 days.

 26.The underlined part in Paragraph 3 means that _'

     A. we needn't worry about Patrick's economic conditions

     B. the trip will turn Patrick into a beggar

     C. Patrick will get much money from the trip

     D. it's likely that Patrick will be very poor after he comes back

 27. What can be inferred from the passage?

     A. A total of six people will go to Mars.

     B. Patrick's father felt excited at the news.

     C. Patrick will spend all his money on the trip.

     D. Patrick is an optimistic man.

已知是上的偶函数，且在上是减函数，若，则不等式的解集是

A.       B.

C.         D.

美国东部时间2011年3月17日21：00左右，人类首个绕水星运动的探测器“信使号”进入水星轨道，并发回首批照片．水星是最靠近太阳的行星，其密度与地球的密度近似相等，半径约为地球的．水星绕太阳一周需要88天，若将水星和地球的公转轨道看做圆形，（地球表面的重力加速度为9.8m/s²，地球公转周期为365天，地球的第一宇宙速度为7.9km/s）则（   ）                                                                                                                              

　   A．  水星表面的重力加速度约为3.7 m/s²

　   B．  从水星表面发射卫星的第一宇宙速度约为2.96 km/s

　   C．  水星与地球连续两次相距最远的时间约为365天

　   D．  水星与地球的公转加速度的比值可以由题设条件求出

已知；△，下列说法中正确的是（     ）

A. 该反应中熵变、焓变皆大于0

B. 该反应是吸热反应，因此一定不能自发进行

C. 碳酸盐分解反应中熵增加，因此任何条件下所有碳酸盐分解一定自发进行

D. 能自发进行的反应一定是放热反应，不能自发进行的反应一定是吸热反应

2012年2月20日，我国首部地面沉降防治规划

获得国务院批复。在我国《地质灾害防治条侧》中，

地面沉降被定义为“缓变性地质灾害”，目前全国遭受

地面沉降灾害的城市超过50个，华北地区尤为严重，

累计损失高达三千多亿元。右图为山东省西南部某

城市附近地面沉降量等值线分布图(单位：mm)。读图

回答下列问题。

（1）指出图示地区地面沉降幅度的分布特点，并简析其主要成因。(6分)

（2）针对该地区的地面沉降，除了加强宣传和监测外，你还能为该地区的地面沉降防治工作提出哪些合理化建议?(4分)

下列说法正确的是         (填正确答案标号。选对1个得2分，选对2个得4分，选对3个得6分；每选错1个扣3分，最低得分为0分)

A. 单摆在周期性外力作用下做受迫振动，其振动周期与单摆的摆长无关

B. 变化的电场一定产生变化的磁场，变化的磁场一定产生变化的电场

C. 在光的双缝干涉实验中，若仅将入射光由红光改为绿光，则干涉条纹间距变窄

D. 光纤通信的工作原理是全反射，光纤通信具有容量大、抗干扰性强等优点

E. 用透明的标准样板和单色光检查平面的平整度是利用了光的偏振

2、将ada(腺苷酸脱氨酶基因)通过质粒pET28b导入大肠杆菌并成功表达腺苷酸脱氨酶。下列叙述错误的是(    )

A.每个大肠杆菌细胞至少含一个重组质粒

B.每个重组质粒至少含一个限制性核酸内切酶识别位点

C.每个限制性核酸内切酶识别位点至少插入一个ada

D.每个插入的ada至少表达一个腺苷酸脱氨酶分子

 His first speech as president made a strong_______ on the whole nation.

  A. attention     B. depression     C. impression    D. expression

  Anxiety has now surpassed depression as the most common mental health disease among college students, though depression, too, is on the rise. More than half of students visiting campus clinics cite anxiety as a health concern, according to a recent study of more than 100,000 students nationwide by the Center for Collegiate Mental Health at Penn State. Nearly one in six college students has been diagnosed with or treated for anxiety within the last 12 months, according to the annual national survey by the American College Health Association.

The causes range widely, experts say, from mounting academic pressure at earlier ages to overprotective parents to engagement with social media. Anxiety has always played a role in the development of a student’s life, but now more students experience anxiety so acute that they are seeking professional help. Like many college clinics, the Center for Counseling and Psychological Services at the University of Central Florida (UCF)- one of the country’s largest and fastest-growing universities, has seen sharp increases in the number of clients: 15.2 percent over last year alone.

Anxiety has become characteristic of the current generation of college students, said Dan Jones, the director of Counseling and Psychological Services at Appalachian State University in Boone, N. C. Because of increasingly pressures during high school, he and other experts say, students arrive at college preloaded with stress. Accustomed to extreme parental oversight, many seem unable to govern themselves. And with parents so accessible, students have had less incentive to develop life skills. “They can’t tolerate discomfort or having to struggle,” Dr Jones said.

  More often, anxiety is mild and temporary, the indication of a student under the control of a normal developmental issue-learning time management, for example, or how to handle rejection from a sorority. Mild anxiety is often treatable with early, modest interventions. But to care for rising numbers of severely troubled students, many counseling centers have moved to triage protocols (分诊措施). That means that students with less urgent needs may wait several weeks for first appointments.

  Like many college counseling centers, UCF has designed a variety of daily workshops and therapy groups that implicitly and explicitly address anxiety, depression and their triggers. Next fall the center will test a new app for treating anxiety with a seven-module cognitive behavioral program, accessible through a student’s phone and augmented with brief videoconferences with a therapist. It also offers semester-long, 90-minute weekly therapy groups, such as “Keeping Calm and in Control”, “Mindfulness for Depression” and “Building Social Confidence” -for students struggling with social anxiety.

28. Which of the following contributes to anxiety according to the text?

A. Protection from teachers.      B. An app in students’ phones.

C. Increasingly learning pressure.  D. Management of time learning.

29. What does the underlined word “incentive” in Paragraph 3 probably mean?

A. Prevention.  B. Motivation.   C. Acquisition.    D. Direction.

30. What’s the purpose of those therapy groups mentioned in the last paragraph?

A. To help students suffering anxiety.

B. To test what social anxiety is.

C. To introduce the cognitive behavioral program of UCF. 

D. To emphasize the importance of calm and confidence.

31. Which of the following would be the best title for the text?

A. Tips on dealing with anxiety

B. Causes of anxiety and depression

C. Different mental diseases threaten college students

D. College mental health centers overburdened with anxious students

如图所示是一个透明圆柱的横截面，其半径为R，折射率是，AB是一条直径，今有一束平行光沿AB方向射向圆柱体. 若一条入射光经折射后恰经过B点，试求：

 ①这条入射光线到AB的距离是多少？

②这条入射光线在圆柱体中运动的时间是多少？

下列对生物细胞代谢活动的描述，不正确的是

       A．大肠杆菌在拟核区转录信使RNA

       B．乳酸杆菌在细胞质基质中产乳酸

       C．衣藻进行光合作用的场所是叶绿体

       D．酵母菌的高尔基体负责合成蛋白质

乙苯()是重要的化工原料，工业上利用乙苯可以制备苯乙烯和β-氯苯乙烷:

乙苯脱氢制苯乙烯:
△H₁=akJ/mol

乙苯氯化制β-氯苯乙烷:

△H₂=bkJ/mol

回答下列问题:
(1)利用下表提供的数据计算a=_____。乙苯脱氢制苯乙烯的反应在_____(填“高温”或“低温”)有利于其自发进行。

(2)已知

+HCl(g)   △H=-54kJ/mol

H₂ (g)+Cl₂(g)=2HCl(g)    △H=-185kJ/mol  则b=______________。

(3)T℃，将nmol乙苯加入到体积为V L的恒容容器中，发生脱氢反应，容器内压强随时间变化如下表所示:

平衡时容器内气体的总物质的量为______，乙苯的转化率为______%。

(4)工业由乙苯脱氢制苯乙烯实际上是在恒压密闭容器中进行的。将m mol乙苯通入某恒压密闭容器中(反应过程中维持压强为p),乙苯的平衡转化率随温度变化如右图所示:

①在a点所示的条件下，向该容器中通入25L水蒸气，则乙苯的转化率______(填“变大”“变小”或不变)，生成苯乙烯的速率________(填“变大”“变小”或不变)。

②b 点气体总体积______(填“<”“>”或“=”)c 点气体总体积。

③c点平衡常数Kp=_______(用平衡分压代替平衡浓度，平衡分压=物质的量分数×总压)。

下图为生物体内4种有机分子的结构，其中①仅存在于植物细胞中，不正确的是（      ）

A．①最可能存在于叶肉细胞叶绿体类囊体薄膜上，②的功能是运输氨基酸，具有特异性    

B．②与吡罗红呈现红色，其中含有与③中a类似的结构，③是生命活动的直接能源物质

C．细胞中没有①也能产生③；②③④都含有核糖，三者在任何生物体内都存在

D．④的全称为腺嘌呤核糖核苷酸，其中的b称为腺苷

18.下列各句中，没有语病的一句是(    )（3分）

A.随着“丝绸之路经济带”重大战略构想的逐步实施，新疆作为向西开放的桥头堡和丝绸之路经济带核心区的战略地位更为凸显。

B.越南人学习中文的势头近年来蓬勃发展，双方虽然因南海紧张局势而关系恶化，但是越南的“中文热”没有降温。

C.有数据显示，近几年我国石材外贸发生了高增长的态势。广东云浮、福建南安作为我国两大石材出口基地，已占到全球石材贸易额的百分之十五以上。

D.整治行动中发现目前市面上在售的电动车存在超重、超速等违规现象，有些电动车经改装后时速可达每小时60公里。

昨日的报刊就是今日的历史资料。下图有助于我们了解 

A．中共“七大”                 B．中国人民政治协商会议第一次全体会议

C．中共“八大”                 D．第一届全国人民代表大会

 AUG是甲硫氨酸的密码子，又是肽链合成的起始密码子。人体血清白蛋白的第一个氨基酸并不是甲硫氨酸，这是新生肽链经加工修饰的结果。加工修饰的场所是

A．内质网和高尔基体   B．高尔基体和溶酶体

C．内质网和核糖体     D．溶酶体和核糖体

向CuSO₄溶液中逐滴加入心溶液至过量，观察到产生白色沉淀CuI，蓝色溶液变棕色.再向反应后的溶液

   中通入过量的SO₂，溶液变成无色。则下列说法正确的是

A．通入22.4L SO₂参加反应时，有2N_A个电子发生转移

B．通入SO₂后溶液逐渐变成无色，体现了SO₂的漂白性

C．滴加粗溶液时，KI被氧化，CuI是氧化产物

D．上述实脸条件下，物质的氧化性：Cu²⁺>I₂>SO₂