20080507
40.A.count on B.tend to C.talk with D.agree with
41.A.joined B.found C.took D.made
42.A.also B.only C.still D.simply
43.A.expected B.debated C.agreed D.joked
44.A.final B.special C.opening D.greeting
45.A.with B.from C.in D.by
46.A.change B.turn C.stop D.end
47.A.for B.but C.and D.so
48.A.likely B.ready C.sure D.due
49.A.pass B.help C.care D.face
50.A.steps B.lines C.point D.case
51.A.introduction B.instruction C.explanation D.suggestion
52.A.scanned B.grasped C.practiced D.presented
53.A.valued B.saved C.left D.kept
54.A.offered B.avoided C.risked D.missed
55.A.successful B.thankful C.trustful D.hopeful
第三部分:阅读理解(共20小题,每题2分,满分40分)
阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。
A
56.Tommy Molina’s letter is used in the ad to .
A.prove the camp is wonderful
B.tell the way to meet cool people
C.introduce the great camping place
D.show everybody is eager to come back
57.The information in ACTIVITIES OFFERED shows us that .
A.owning a camera is a must to learn how to take pictures
B.weekly competitions will be held by Chippenstock Times.
C.classes are available for campers of different swimming levels
D.campers can get close to nature by joining in Craft and Hiking
58.From the advertisement we learn that .
A.Camp Chippenstock is intended for all teenagers
B.all the instructors used to be Chippenstock campers
C.we can take part in the camp throughout the summer
D.Camp Chippenstock costs less than many other camps
B
While watching the Olympics the other night, I came across an
unbelievable sight. It was not a gold medal, or a world record broken, but a
show of courage.
The event was swimming and started with only three men on the
blocks. For one reason or another, two of them false started, so they were
disqualified. That left only one to compete. It would have been difficult
enough, not having anyone to race against, even though the time on the clock is
important.
I watched the man dive off the block and knew right away that
something was wrong. I’m not an expert swimmer, but I can tell a good dive from
a poor one, and this was not exactly medal quality. When he resurfaced, it was
evident that the man was not out for gold ? his arms were waving in an attempt
at freestyle. The crowd started to laugh. Clearly this man was not a medal
competitor.
I listened to the crowd begin to laugh at this poor man who was
clearly having a hard time. Finally he made his turn to start back. It was
pitiful. He made a few desperate strokes and you could tell he was worn out.
But in those few awful strokes, the crowd had changed.
No longer were they laughing, but beginning to cheer. Some even
began to stand and shout “Come on, you can do it!” and he did.
A clear minute past the average swimmer, this young man finally
finished his race. The crowd went wild. You would have thought that he had won
the gold, and he should have. Even though he recorded one of the slowest times
in Olympic history, this man gave more heart than any of the other competitors.
Just a short year ago, he had never even swum, let alone race. His
country had been invited to Sydney.
In a competition where athletes remove their silver medals feeling
they have somehow been cheated out of gold, or when they act so proudly in
front of their competitors, it is nice to watch an underdog.
59.From the passage we can learn that the young man .
A.made his turn to start back pitifully
B.was skillful in freestyle in the game
C.swam faster than the average swimmer
D.was not capable enough to win the medal
60.The crowd changed their attitudes because .
A.they felt sorry for the young man
B.they were moved by the young man
C.they wanted to show their sympathy
D.they meant to please the young man
61.According to the passage, “it is nice to watch an underdog”
probably means .
A.it’s amusing to watch a man with awful swimming skills
B.it’s amazing to watch an ordinary man challenging himself
C.it’s cheerful for athletes to act proudly before their competitors
D.it’s brave enough for some athletes to remove the silver medals
62.What’s the best title for the passage?
A.Compete for Gold! B.Try again!
C.Break a Record! D.Go for it!
C
In Alexandria, Virginia,
the two thousand students at T.
C. Williams
High School started
classes last month in a new building. It was built as a “green” school based on
requirements from the United States Green Building Council.
The council is a nonprofit organization made up of building industry
leaders. It has a rating system for buildings called Leadership in Energy and
Environmental Design, or LEED.
In 2001, there were four schools asking for LEED certification. Now
there are four hundred, including T.C. Williams. So far, fifty-eight schools
have been recognized for meeting the requirements. These include protecting
natural areas and limiting the amount of chemicals in building materials. They
also include better lighting and improved indoor air quality. Buildings are
also rated on how well they use energy and water, and on things like the use of
recycling programs. At T.C. Williams, one example of green design can be seen
in the many windows that let in natural light. Students say the sunny rooms
help them stay awake during class.
A rooftop garden is designed to provide storm water control and help
keep the building cool in the sun. And an underground tank can store 1,700,000
liters of rainwater for air conditioning and other systems.
The new building cost about 90,000,000 dollars to build. It stands
next to the old T.C. Williams building, which officials say will slowly be
taken apart and recycled. T.C.
Williams High
School is still waiting for the final part of the
LEED certification process. Schools receive points for the number of
requirements they meet. Buildings are rated silver, gold or platinum.
Around the country, concerns about limited budgets for public
schools sometimes lead to objections to investing in “green” schools. But the
Green Building Council points to a report by Capital E, a Washington, D.C.,
company that serves the clean energy industry. Capital E examined the cost of
thirty “green” schools in the United
States. It says the average cost was only
two percent higher compared to a traditional school. And it says this extra
cost is small compared to the savings over time from lower energy and water
costs and healthier students.
63.The United States Green Building Council aims to .
A.collect money for “green” schools
B.construct “green” buildings on its own
C.promote the construction of “green” schools
D.evaluate the “greenness” of any school building
64.We know from the passage that .
A.LEED evaluates the buildings at four different levels
B.Capital E designed many requirements for “green” schools
C.T.C. Williams High School has
received LEED certification
D.LEED is provided by the United States Green Building Council
65.The underlined word they in Paragraph 3 refers to .
A.the requirements B.the natural areas
C.the building materials D.the amount of chemicals
66.What can be inferred from the last paragraph?
A.Green schools cost more than traditional ones.
B.Capital E is devoted to the clean green industry.
C.Green schools will have more benefits in the long term.
D.Limited budgets cause a disagreement on “green” schools.
D
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jobs, Jonathan Grubin, a 16 ? year ? old boy, has logged on to an online success which turned over £75,000 last year. Now his success is already beginning to show with the launch of ForFrea4U.co.uk, which offers visitors free iPods and digital cameras for signing up their friends to its advertisers. Jonathan
has got more than 55,000 members to the site in less than two years, sending off £25,000 worth of
products. His success is down to a business move known as affiliate marketing,
a web ? based marketing practice in which a business rewards one or more
affiliates for each visitor or customer brought about by the affiliate’s marketing
efforts. The Royal
Grammar School student
said: “I have always been interested in websites and the ideas behind them. I
though, ‘if only there was another way I could get my hands on these goods’, so
I made a website for a bit of fun.” Jonathan added: “I partner with some
advertisers, and they send me commission (佣金) each time I get them a new customer. I offer visitors to my
website a reward when they sign up.” “Advertisers were very quick to realize the potential of the
network. Affiliale marketing is highly successful for advertisers because they
only pay when they see results.” “When you run an expensive television advertising campaign, nothing
is guaranteed. But with my business model, advertises only pay their commission
when they see results.” Jonathan, who works from his computer at home, launched his first
website when he was 12 offering mobile phone wallpapers and screensavers after
rival sites were charging youngsters for downloads. He also runs livenewcastle. co. uk,
a resource website for Newcastle
with listings, reviews and directories. He added: “I remember receiving my
first cheque, it was £10.44, and I
was amazed that I had received it. The only thing I really want to do is to be
able to work for myself.” “There are a lot of downsides, but there are advantages too. The
fact is that I am so young, and when I’m 20, I’m going to have a lot of
knowledge and experience that most people won’t have until they are 30 or 40.” 67.Which of the following helps lead to the success of For
Free4U.co.uk? A.It provides visitors with presents for signing up their friends to
its advertisers. B.It offers teenagers mobile phone wallpapers and screensavers for
free. C.It gets payment when it publishes ads. D.It charges youngsters for downloads. 68.Which of the following is NOT true according to the passage? A.Jonathan set up his first website when he was twelve. B.Jonathan is a student of Royal
Grammar School. C.Jonathan founded the websites for money only. D.Jonathan is in charge of two websites now. 69.According to the passage, it’s obvious that . A.Jonathan’s websites are popular with both visitors and advertisers B.visitors sign up on Jonathan’s website in order to get rewards C.advertisers pay for their products being advertised online D.Jonathan is interested in working all by himself 70.The passage is mainly about . A.a smart online advertising technique B.a promising business web - master C.a web ? based marketing producer D.a successful online marketing E Today’s career assumptions are that you can get a lot of development,
challenge and job satisfaction and not necessarily be in a management role. “I hated all the meetings,” says a 10-year award-winning manager, “And
I found the more you did for people who worked for you, the more they expected.” Managing others is
always a tough task, but in the past that stress was balanced by hopes for
career mobility and financial rewards. Along with a sizable pay raise, people
chosen as managers would begin a nearly automatic climb up the career ladder to
lucrative executive private benefits: company cars, club memberships, plus the
key to the executive washroom. But in today’s global, more competitive showground, a manager sits
in an insecure chair. Restructuring
has removed layer after layer of management as companies came to view their
organizations as collections of talents rather than hierarchies(等级). There are far fewer steps for managers to climb. Also, managerial
jobs demand more hours and headaches than ever before but offer slim, if any,
financial paybacks and perks. Now managers must manage many people who are spread over different
locations, even over different continents. They must manage across functions
with, say, design, finance and marketing. In an age of
entrepreneurship, when the most praised people in business are those launching
something new, management seems like an invisible, thankless role. Employers
are looking for people who can do things, not for people who make other people
do things. In addition, the
Dilbert factor is at work. With Dilbert’s popular cartoon character as well as
many television situation comedies routinely describing managers as fools or
enemies, they just don’t get much respect any more. Moreover, it may not
pay to be a manager at least not the way it once did. Ms. Chmielewski says. “The
emotional rewards can be great, and there were times I enjoyed management. But
a 10-to-11-hour day and one weekend day a month is the norm.” With more people
cautious of joining management, are corporations being hurt or worrying about
developing future leaders? Not many are. While employers have dismissed a lot
of managers, they believe many more candidates lingers on at many companies. “Another
reason companies aren’t short of managers”, argues Robert Kelly, a business
professor, “is that so many workers today are self-managed, either individually
or via teams, you don’t need a manager.” 71.By writing the passage, the writer seems to . A.explain reasons for firing managers B.advise people not to become managers C.express dissatisfaction of some managers D.encourage managers to be more competitive 72.Compared with the past, the managing job today is more . A.demanding B.rewarding C.questionable D.acceptable 73.The author mentions what Ms. Chmielewski says to reflect that . A.the managers’ low working efficiency makes them less paid B.the gain of being a manager is not as satisfactory as before C.she enjoys great emotional rewards of being a manager D.she misses the past enjoyment of being a manager 74.What can we learn from the passage? A.Managers have more chances to be promoted now. B.Managers were not satisfied with the way they were treated. C.It is unnecessary for a qualified manager to manage a variety of
fields. D.The cartoon character by Dilbert contributes to the bad image of
managers. 75.What can we infer from the last paragraph? A.More and more people are eager to become managers. B.There will be more managers to be employed in the future. C.Employers think it easy for them to find managers in the future. D.Team ? work makes it possible for companies not to hire more
managers. 第Ⅱ卷(共35分)
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20080507 第四部分:书面表达(共两节,满分35分) 第一节 情景作文(20分) 你班要举办以“Ordinary but Great”为题的英语主题班会。请根据下列信息准备一篇发言稿,介绍赵郁的成长经历。 姓名 赵郁
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职务 北京奔驰(Benz)公司首席技师 经历 1.从小喜欢发明创造; 2.做普通工人17年; 3.自学电脑、英语;能看懂英文汽车资料;能解决有关汽车的技术难题; 4.获得许多奖励。 注意:1.词数不少于60。 2.文章的题目和开头已经给出。 3.可以适当增加细节,以使行文连贯。 提示词:首席技师 chief technician Ordinary
but Great We are all
ordinary people, but following what we are interested in and doing what we are
good at can help us make great achievements for society and go far. Here’s a
convincing and inspiring example. 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.
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北京市海淀区2008年高三第二学期期末练习 理科综合试题 本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,满分300分。考试时间150分钟。 注意事项: 1. 答卷前将学校、班级、姓名填写清楚。 2. 第Ⅰ卷每小题选出答案后,用铅笔把答题卡上对应题目的答案标号涂黑。如需改动,用橡皮擦干净后,再选涂其他答案。不能直接答在试题卷上。 第Ⅰ卷(选择题 共120分) 本卷共20小题,每小题6分,共120分。在每小题给出的四个选项中,选出符合题目要求的一项。 可能用到的相对原子质量:H 1 C 12 N 14 O 16 Na
23 S 32 C1
35.5 Fe 56 Cu 64
I 127 1.下列有关人类健康的叙述,正确的是 ( ) A.吃一些含卵磷脂较多的食物,有预防脂防肝的作用 B.植物性食物的氨基酸种类比动物性食物更适合人类的需求
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D.预防过敏反应的主要措施是让身体产生对过敏原的适应 2.潮间带常见的浜螺捕食多种藻类,尤其喜食竞争力强的浒
苔。据图1判断下列叙述不正确的是
( ) A.浜螺捕食浒苔,其它藻类能获得更多的生存空间 B.浜螺的种群密度越大,越容易维持藻类的多样性 C.若潮间带没有浜螺,其藻类多样性会下降 D.浜螺的种群密度对藻类的多样性有调控作用 3.下列有关免疫的叙述,不正确的是
( ) A.效应T细胞与靶细胞密切接触,可导致靶细胞裂解死亡 B.再次受到同种抗原刺激时,记忆细胞可迅速产生大量抗体 C.T细胞可以产生淋巴因子,刺激B细胞增殖和分化 D.吞噬细胞在特异性免疫和非特异性免疫中都发挥作用 4.下列关于利用谷氨酸棒状杆菌生产谷氨酸的叙述中,正确的是 ( ) A.利用微生物发酵法生产谷氨酸,常用的培养基属于合成培养基 B.发酵罐中的谷氨酸过量时,会抑制相关酶的活性,属于酶合成调节 C.应该选择稳定期的菌体作菌种,因为该期菌体生理特征比较稳定 D.通过连续培养法生产谷氨酸有助于缩短培养周期,提高设备利用率 5.2008年8月8日第29届奥运会将在北京举行。下列说法正确的是 ( ) A.奥运会场馆“鸟巢”使用的Q460特殊钢属于合金 B.奥运会期间使用的大型遥控飞艇充入的安全且轻的气体是氢气 C.奥运会场馆“水立方”用的新研制涂料氮化镓属于硅酸盐材料 D.奥运吉祥物“福娃”制品内的填充物聚酯纤维是天然高分子材料 6.根据下列实验内容得出的结论正确的是 ( ) 选项 实验内容 结论 A 某物质的水溶液使红色石蕊试纸变蓝 该物质一定是碱 B 某气体能使湿润淀粉碘化钾试纸变蓝 该气体一定是氯气 C 某物质的水溶液中加入盐酸产生无色无味气体 该溶液一定是碳酸根离子 D 0.84g铁和50.00mL 1.00mol/L的稀硝酸反应 反应后溶液中一定有Fe3+和Fe2+
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A.兴奋剂X的化学式为C16H15O3 B.两者均不芳香族化合物,均能发生消去反应 C.两者均能与酸性高锰酸钾溶液和氢氧化钠溶液反应 D.1 mol 利尿酸最多可与4
mol Br2和6 mol H2反应 8.下列实验操作合理的是 ( ) A.可用分液漏斗分离硝基苯和水的混合物 B.除去苯中的少量苯酚,可加入浓溴水后过滤 C.银镜反应实验后试管内壁附有银,可用氨水清洗 D.可用酸性高锰酸钾溶液鉴别已烯、甲苯、乙酸乙酯 9.下列指定粒子的数目相等的是 ( ) A.物质的量相等的水与重水含有的中子数 B.等质量的乙烯和丙烯中含有共用电子对数 C.同温、同压、同体积的一氧化碳和乙烯含有的质子数 D.等物质的量和铁和铜分别与氯气完全反应,转移的电子数
X Y Z R W Z、R和W为主族元素。下列说法正确的是( )
20080507 20080507 B.五种元素的原子最外层电子数一定大于2 C.X的氢化物的沸点一定比Z的氢化物的沸点高 D.R的最高价氧化物对应的水化一定是强酸 11.某温度下,2L密闭容器中充入2 molX、1molY,发生反应2X(g)+Y(g) 2Z(g),经60s达平衡,此时Y的物质的量为0.2mol。下列说法不正确的是 ( )
A.在当温度不变,容器体积变为1L时,Z的物质的量增大 B.在温度、体积不变的情况下,用Z表示化学反应的速率为0.8 mol/L(L?min) C.在体积不变,升高温度重新达到平衡时,Z的物质的量为1.4mol,则正反应的△H<0 D.在温度、体积不变的情况下,若再充入2 molX、1mol Y,重新达平衡后,Z的体积 分数不变 12.下列说法正确的是 ( ) A.t℃时,某溶液的pH=6,则该溶液一定为酸性 B.常温下,将pH=11的氨水稀释后,溶液中所有离子的浓度均降低 C.常温下,将pH=11的NaOH溶液和pH=3的CH3COOH溶液等体积混合后,溶液pH<7 D.常温下,物质的量浓度和体积相同的K2CO3、K2SO4、HC1溶液混合后,溶液的pH<7 13.在下列各组光学实验现象事实中,都能说明光具有波动性的一组是 ( ) A.白松亮斑、雨后空中出现的彩虹 B.水面上的油膜呈现彩色、用光导纤维传播信号 C.光的双缝干涉现象、偏振现象 D.日食、光电效应现象 14.关于天然放射现象,下列说法中正确的是 ( ) A. 衰变说明原子核里有电子 B.某原子核经过一次 衰变和两次 衰变后,核内中子数减少4个 C.放射性物质的温度升高,其半衰期将缩短 D. 射线的电离作用很强,可用来消除有害静电 15.分子间有相互作用的势能,规定两分子相距无究远时分子势能为零,并已知两分子相距r0时分子间的引力与斥力大小相同。设分子a和分子b从相距无究处分别以一定的初速度在同一直线上相向运动,直到它们之间的距离达到最小。在此过程中下列说法正确的是 ( ) A.a和b之间的势能先增大,后减小 B.a和b的总动能先增大,后减小 C.两分子相距r0时,a和b的加速度均不为零 D.两分子相距r0时,a和b之间的势能大于零
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实验装置,此装置可视为摆长为L的单摆, 沙摆的运动可看作简谐运动,实验时在木 板上留下图(甲)所示的结果。若用手拉 木板做匀速运动,速度大小是0.20m/s。 图(乙)所示的一段木板的长度是0.60m, 那么这次实验所用沙摆对应的单摆长L约 为
( ) A.2.0m B.1.5m
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17.向心力演示器如图3所示。转动手柄1,可使变速 塔轮2和3 以及长槽4和短槽5随之匀速转动。 皮带分别套在塔轮2和3上的不同圆盘上,可使两 个槽内的分别以几种不同的角速度做匀速圆周运动, 小球做圆周运动的向心力由横臂6的挡板对小球的 压力提供,球对挡板的反作用力,通过横臂的杠杆 使弹簧测力套筒7下降,从而露出标尺8,标尺8 上露出的红白相间等分格子的多少可以显示出两个 球所受向心力的大小。现分别将小球放在两边的槽 内,为探究小球受到的向心力大小与角速度的关系,下列做法正确的是 ( ) A.在小球运动半径相等的情况下,用质量相同的钢球做实验 B.在小球运动半径相等的情况下,用质量不同的钢球做实验 C.在小球运动半径不等的情况下,用质量不同的钢球做实验 D.在小球运动半径不等的情况下,用质量相同的钢球做实验
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车箱中,使杆沿轨道方向固定,可以对火车运动 的加速度进行检测。闭合开关S,当系统静止时, 穿在光滑绝缘杆上的小球停在O点,固定在小球 上的变阻器滑片停在变阻器BC的正中央,此时, 电压表指针指在表盘中央0刻度。当火车水平方 向有加速度时,小球在光滑绝缘杆上移动,滑片 P随之在变阻器上移动,电压表指针发生偏转。 已知火车向右加速运动时,电压表的指针向左 偏。则
( ) A.若火车向右做减速运动,小球在O点右侧,电压表指针向左偏 B.若火车向左做减速运动,小球在O点左侧,电压表指针向右偏 C.若火车向左做减速运动,小球在O点左侧,电压表指针向左偏 D.若火车向右做减速运动,小球在O点右侧,电压表指针向左偏
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粒子a、b所通过的路径,则 ( ) A.a的质量一定大于b的质量 B.a的电荷量一定大于b的电荷量 C.a运动的时间大于b运动的时间 D.a的比荷(qa/ma)大于b的比荷(qb/mb)
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A.铁块与轻弹簧相碰过程中所具有的最大弹性势能 B.弹簧被压缩的最大长度 C.长木板运动速度的最大值 D.铁块与长木板间的动摩擦因数 第Ⅱ卷(非选择题 共180分)
20080507
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波长,已知双缝间距d=0.20m,双缝到屏的距离 L=700mm,将测量头的分划板中心刻线与某一亮 条纹的中心对齐,并将该条纹记为第一亮条纹, 其示数如图7所示,此时的示数为 mm。 然后转动测量头,使分划板中心刻线与第五条亮 条纹的中心对齐,测出第五条亮条纹与第一亮条 纹中心线间的距离为9.240mm。由以上数据可求得该红光的波长为
m(保留两位有效数字)
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A.电阻箱:最大阻值为999.9.files/image030.gif) B.电阻箱:最大阻值为99999.9.files/image030.gif) C.滑动变阻器:最大阻值为200.files/image030.gif) D.滑动变阻器:最大阻值为2 k.files/image030.gif) E.电源:电动势约为2V,内阻很小; F.电源:电动势约为6V,内阻很小; G.开关,导线若干。 为提高测量精度,在上述可供选择的器材中,可变电阻R1应该选择
;可变电阻R2应该选择
;电源E应该选择 。(填入选用器材的字母代号) ②测电流G内阻R2的实验步骤如下: a. 连接电路,将可变电阻R1调到最大; b. 断开S2,闭合S1,调节可变电阻R1使电流表G满偏;
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时可以认为电流表G的内阻Rx=R2设电流表G内 阻Rx的测量值为R测,真实值为R真,则Rx R真。 (填“大于”、“小于”或“相等”) ③若测得R真=105.0 ,现串联一个9895.0 的电 阻将它改装成电压表,用它来测量电压,电流表盘 指针位置如图9所示,则此时所测量的电压值应是 V。 22.(16分)质量m=2.0×10-4kg、电荷量q=1.0×10-6C的带正电微粒静止在空间范围足够大的匀强电场中,电场强度大小为E1。在t=0时刻,使电场强度空然增加到E2=4.0×103N/C,到t=0.20s时刻再把电场方向改为水平向右,场强大小保持不变。g=10m/s2。求: (1)电场强度E1的大小; (2)t=0.20s时刻带电微粒的速度大小; (3)带电微粒运动速度水平向右时的动能。 23.(18分)高频焊接是一种常用的焊接方法,图10是焊接的原理示意图。将半径r=0.10m
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(1)0―2.0×10-2s和2.0×10-2s―3.0×10-2s时间内环形金属工件中感应电动势各是多大; (2)0―2.0×10-2s和2.0×10-2s―3.0×10-2s时间内环境金属工件中感应电流的大小,并在图12中定量画出感应电流随时间变化的i-t图象(以逆时针方向电流为正); (3)在t=0.10s内电流通过焊接处所产生的焦耳热。
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(1)求卫星从“48h轨道”的近地点P进入“地月转移轨道”过程中主发动机对“嫦娥一号卫星”做的功(不计地球引力做功和卫星质量变化); (2)求“嫦娥一号卫星”在绕月球圆形工作轨道Ⅰ上运动时距月球表面的高度; (3)理论证明:质量为m的物体距月球无限远处无初速释放,它在月球引力作用下运动至月球中心的距离为r处的过程中,月球引力对物质所做的功可表示为W=Gm月m/r月。为使“嫦娥一号卫星”在近月点Q进行第一次制动后能成为月球的卫星,且与月球表面的距离不小于圆形工作轨道Ⅰ的高度,最终进入圆形轨道Ⅰ,其第一次制动后的速度大小应满足什么条件?
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已知:有机物B和有机物C的蒸气在同温同压下密度相同,有机物C分子中含有两个甲基。请回答下列问题:
(1)F和D中含有的官能团的名称分别为
。
(2)有机物C的结构简式为 。
(3)有机物E能发生的反应类型有(填字母) 。 A.取代反应 B.加成反应 C.消去反应 D.加聚反应 E.中和反应
(4)以M表示有机物的摩尔质量,则下列关系正确的是(填字母) 。 A.M(A)=M(B)+M(C) B.M(B)=M(E)+14 C.2M(D)+18=M(B)+M(E) D.M(B)>M(D)>M(E)>M(F)
(5)简述检验有机物D中的官能团的实验方法
。 (6)有机物A的一种同分异构体X,能发生银镜反应,且分子结构中有1个碳原只与碳原子相连。X与氢气在一定条件下反应生成有机物Y,Y分子中含有两个相同的官能团。写出X的结构简式。
。
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有机物Y有广泛的用途,如生产泡沫塑料、涂料等。写出Y与对苯二甲酸在一定条件下发生缩聚反应的化学方程式
。 26.(18分)X、Y和W为原子序数依次递增的短周期元素,X和Y同主族,Y和W的气态氢化物具有相同的电子数,X的单质只有氧化性。
(1)写出实验室制取W2反应的离子方程式
。
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①分别通入YX2和W2,在装置A中观察到的现象是否相同(填“相同”或“不相同”)
; 若装置D中装的是铁粉,当通入W2时观察到的现象为
;若装置D中装的是五氧化二钒,当通入YX2时,打开K通入适量X2,化学反应方程式为
; ②若装置B中装有5.0mL 1.0×10-3mol/L的碘水,当通入足量W2完全反应后,转移了5.0×10-5mol电子,该反应的化学方程式为
。 (3)某同学将足量的YX2通入一支装有氯化钡溶液的试管,未见沉淀生成,向该试管中加入过量(填字母)
,可以看到白色沉淀生成,其原因分别为
。 A.氨水 B.稀盐酸 C.稀硝酸 D.氯化钙 (4)若由元素Y和X组成―2价酸根Z,Z中Y和X的质量比为Y:X=4:3,当W2与含Z的溶液完全反应后,有浅黄色沉淀产生,取上层清液加入氯化钡溶液,有白色沉淀产生,该反应的离子方程式为
。 27.(15分)A、B、D、E和F为中学化学常见的化合物,A、B、D、E的焰色反应均呈黄色,F为无色无味气体。相互转化关系如下: A+F→B+O2
B+F+H2O→D D+E→B+H2O 请根据题目要求回答下列问题。
(1)①写出E的电子式
; ②写出反应A+F→B+O2的化学方程式
; ③写出D溶液与E溶液反应的离子方程式
。
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装置(I)中G和N为气体进口,其中G口进入的气体名称是
,写出电极②的电极反应式
。 (3)装置(II)是新近研制装有涂二氧化钛的光电析的光电电解水装置的示意图,在电极附近的K出口产生气体化学式是
。 (4)在A中加入稀硫酸可生成一种含有非极性键的共价化合物X,写出向E和X的混合溶液中,通入二氧化氮反应的离子方程式
。 28.(12分)据报道,北京奥运会“祥云”火炬燃料为丙烷,悉尼奥运会火炬燃料为丁烷和丙烷混合气。 (1)常温、同压下,等体积的丙烷和丁烷完全燃烧恢复到原状态,生成二氧化碳的体积比为
。 (2)已知丁烷的燃烧热(生成液态水)为2880kJ/mol,1mol丙烷和丁烷(物质的量之比1:1)的混合气完全燃烧放出的热量为2550kJ。写出丙烷燃烧的热化学方程式 (3)标准状况下,1.0mol丙烷和丁烷的混合气和足量氧气混合完全燃烧后,恢复至原状态,混合气体的体积减小了70.0L,混合气体中丙烷和丁烷的体积比为
。 (4)标准状况下,aL的某丙烷和丁烷的混合气体,在bL足量氧气中完全燃烧后,恢复到原状态体积为VL,所得气体体积V为(用a和b表示)
。
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穗下第一张叶片(旗叶)的光合作用 供给,其它绿色部分如麦穗也有光合能 力。图17示小麦旗叶和麦穗光合作用 与耐旱性关系的研究结果。请回答下 列有关问题: (1)由图可知,
的兴合作用 对缺水比较敏感,如果小麦在孕穗 期和开花期遇到干旱,将对产量有 较大的影响。同时, 的光合作用对干旱有较强的适应性,这对植物度过不良环境有一定的积极作用。 (2)水分对光合作用的影响是多方面的。一方面缺水可导致气孔关闭,光合作用会因 阶段的原料不足而受到影响。另一方面缺水还会使物质运输变慢,当光合产物在 中积累过多时,会使光合作用产生反馈性抑制。 (3)不同程度的缺水对光合作用的影响也有所不同。中度缺水会影响叶绿体囊状结构薄膜上的电子传递,从而使
的形成受到抑制;严重缺水还会造成叶绿体囊状结构的破坏,而且在供水后也难以恢复。因而,植物不能长时间缺水,合理灌溉就是指根据植物的需水规律
地进行灌溉。 30.(18分)请回答下列有关温度与酶活性的问题: (1)温度对唾液淀粉酶活性影响的实验: 将盛有2mL唾液淀粉酶溶液的试管和盛有2mL可溶性淀粉溶液的试管编为一组,共四组。在0℃、20℃、37℃和100℃水浴中各放入一组,维持各自的温度5min。然后,将淀粉酶溶液注入相同温度下的淀粉溶液中,摇匀后继续放回原来的温度下保温。 把
的时间作为本实验的起始时间记录下来。再每隔一分钟,取一滴混合液滴在盛有碘液的点滴板上进行观察,记录每种混合液蓝色消失的时间。通过比较混合液中
消失所需时间的长短来推知酶的活性。预计
温度下混合液因其中的酶失去活性蓝色不会消失。 (2)温度对酶活性的影响主要体现在两个方面。其一,随温度的升高会使
接触的机会增多,反应速率变快。其二,因为大多数酶是蛋白质,本身随温度升高而发生
的改变,温度升到一定程度,酶将完全失活。这两种作用叠加在一起,使酶促反应在某一温度下最快,这一温度就是该酶的
。 (3)科研人员通过蛋白质工程来设计改变酶的构象。在研究溶菌酶的过程中,得到了多种突变酶,测得酶50%发生变性时的温度(Tm),部分结果见下表: 酶 半胱氨酸(Cys)的位置和数目 二硫键数目 Tm/℃ 野生型T4溶菌酶 Cys51,Cys97 无 41.9 突变酶C Cys21,Cys143 1 52.9 突变酶F Cys3,Cys9,Cys21,Cys142,Cys164 3 65.5 (注:Cys上角的数字表示半胱氨酸在肽链的位置) 溶菌酶热稳定性的提高,是通过改变
和增加 得以实现的。从热稳定性高的酶的氨基酸序列出发,利用
方法获得目的基因,通过基因工程的手段,可以生产自然界中不存在的蛋白质。
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16号染色体上,胎儿期和成年期基因的表达情况 如图18所示(注:α2表示两条α肽链) (1)人在不同发育时期血蛋白的组成不同,这是 红细胞不同基因
的结果。 图中α链由141个氨基酸组成,β链由146 个氨基酸组成,那么成年人血红蛋白分子的 肽键数是
。 (2)图中11号染色体上β珠蛋白基因中一个碱 基对的改变,导致谷氨酸被缬氨本替换(人 类镰刀型细胞贫血症)。已知谷氨酸被缬氨酸的密码子之一为GAA,缬氨酸的密码子之一为GUA。则突变后的基因控制该氨基酸的相应片段其碱基组成是
。 (3)下列哪种方法不能用来确诊镰刀型贫血症的患者(单选)
。
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