第一节 听力理解(5段共15小题;每小题2分,满分30分)

每段播放两遍。各段后有几个小题,各段播放前每小题有5秒钟的阅题时间。请根据各段播放内容及其相关小题,在5秒钟内从题中所给的A、B、C项中,选出最佳选项,并在答题卡上将该项涂黑。

听第一段对话,回答第1-3题。

1.  What is Jerry’s wife doing these days?

A.    She is painting a picture.

B.    She is learning a foreign language.

C.    She is typing a book.

2.    When did the two people see each other last time?

A.  A long time ago.     B.  Last Monday.     C.  Last Christmas.

3.  What is true about Joey?

A.  He broke his leg. 

B.  He is learning to play the piano. 

C.  He is interested in sports.

听第二段对话,回答第4-6题。

4.    How much should the woman pay for the health insurance if she finishes a three-year study in American university?

A.  About $ 300.      B.  About $900.     C.  Around $ 3,600.

5.  What’s the woman?

   A.  An American doctor.   B.  A Chinese student.  C.  An insurance agent.

6.  Where can the woman turn to for help to take out an insurance policy?

   A.  College clinics, public and private clinics.

B.  The International Students Office.

C.  The hospital.

听第三段对话,回答第7-9题。

7.     What is NOT true on Seattle according to the man?

A.    Seattle is a coastal city.

B.    Seattle doesn’t get hot until late July.

C.    It is rather humid in Seattle in summer.

8.     What is the weather like this summer?

A.  Hot and humid.     B.  Very cool.      C.  Rainy.

9.  What do we know about the woman?

  A.  She doesn’t agree with the boy on last summer’s weather.

  B.  She is not accustomed to the heat.

  C.  She enjoys the summer holiday.

听第四段对话,回答第10-12题。

10.  What can we learn from the conversation?

A.    There are mountains over 1,000 meters high in the woman’s country.

B.    The coast of the woman’s country is just made up of sandy beaches.

C.    There are many rivers and lakes in both speakers’ countries.

11.  Which of the following does the woman’s country not have?

A. Sandy beaches.   B. Lakes and rivers.   C. Cliffs(悬崖) and rocks.

12.  How does the man describe his country?

A. There are highest mountains in his country.

   B.  There are few lakes and rivers.

C.  There are beautiful waterfalls and landscape shaped by erosion(侵蚀).

听第五段独白,回答第13-15题。

13.  What is the influence of television advertising?

A.     Small children watch television and get their mothers to buy the things they have seen.

B.     Manufacturers watch television and advertise things that children like.

C.     Mothers watch television and buy what they see.

14.  Why does a mother spend a lot on a baby?

A.     Because the baby needs it.

B.     Because baby food is expensive.

C.     Because she wants to give her baby the best.

15.  What do we know about the young children?

A.     They find commercials on TV better than children’s programmes.

B.     They find commercials and children’s programmes equally interesting.

C.     They find only true things on television.

32.(15分)下图是化学研究性学习小组设计的铜与稀硝酸反应的两个实验装置图。其中装置Ⅰ为甲同学设计。(可能用到的相对原子质量:  H:1  C:12  N:14  O:16  Cu:64  )

        

请回答下列问题:

(1)铜与稀硝酸反应的离子方程式为                    。

(2)乙同学认为装置Ⅰ中收集的气体不能确定铜与稀硝酸反应生成的是NO气体,理由是                       ___________________      。于是他设计装置Ⅱ,其中装铜片的是气球。

(3)化学研究性学习小组的其它同学对上述实验 进行了研究,认为装置Ⅱ只能定性研究铜与硝酸的反应,他们又重新设计了一套实验,装置图如右:a中盛有标况下的空气(氧气占五分之一)和10mL,1.2mol/L硝酸的250mL烧瓶。b是未充气(实验开始前内部没有气体)放有0.384g铜粉的气球。(整套装置已经过气密性检查合格。)他们做了以下实验,请填写有关空白: ①将气球中的铜粉小心倒入烧瓶中,充分反应后发现 铜粉有余(设产生的气体不溶解于溶液中),则可观察到的是                                     ②将烧瓶不断振荡发现气球逐渐缩小,发生有关反应的化学方程式是:           ;

③打开弹簧夹将二氧化碳慢慢推入干燥管内继续振荡,使气体与气体、溶液充分接触,欲使所有的铜粉都溶解,至少需要推入二氧化碳      ml; ④将上述全过程用一个总的化学方程式表示:                             

31.(18分)工业合成氨与制备硝酸一般可连续生产,流程如下:

(1)工业生产时,制取氢气的一个反应为:CO+H2OCO2+H2

   ①t℃时,往1L密闭容器中充入0.2mol CO和0.3mol水蒸气。反应建立平衡后,体系中c(H2)=0.12mol·L-1。该温度下此反应的平衡常数K=        。

②保持温度不变,向上述平衡体系中再加入0.1molCO,当反应重新建立平衡时,水蒸气的总转化率α (H2O)=            。

(2)合成塔中发生反应为:N2(g)+3H2(g) 2NH3(g);△H<0。右表为不同温度下该反应的平衡常数。由此可推知,表中T1    573K(填“>”、“<”或“=”)。

T/K
T1
573
T2
K
1.00×107
2.45×105
1.88×103

(3)NH3和O2在铂系催化剂作用下从145℃就开始反应:

4NH3+5O24NO+6H2O  △H=-905kJ·mol-1

不同温度下NO产率如图所示。温度高于900℃时,NO产率下降的原因                 。

(4)吸收塔中反应为:3NO2+H2O2HNO3+NO。从生产流程看,吸收塔中需要补充空气,其原因是                     。

(5)硝酸厂的尾气含有氮氧化物,不经处理直接排放将污染空气。目前科学家探索利用燃料气体中的甲烷等将氮氧化物还原为氮气和水,其反应机理为:

CH4(g)+4NO2(g)=4NO(g)+CO2(g)+2H2O(g);  △H=-574kJ·mol-1

CH4(g)+4NO(g)=2N2(g)+CO2(g)+2H2O(g);  △H=-1160kJ·mol-1

则甲烷直接将NO2还原为N2的热化学方程式为:________________________________。

29.(14分)科学工作者发现野猪某一个基因与家猪的对应基因的某些片段不同,下表Ⅰ是家猪和野猪的某个基因转录的两种不同的mRNA分子片段(每个密码子只写出前面两个碱基)

表Ⅰ:

UA
UA
UA
UA
UA
UA
家猪
m RNA
UU
UU
UU
UC
UC
UC
野猪
m RNA

表Ⅱ:密码子表(部分)

第一个字母
第二个字母
第三个字母
U
C
A
G
U
苯丙氨酸
丝氨酸
酪氨酸
半胱氨酸
U
苯丙氨酸
丝氨酸
酪氨酸
半胱氨酸
C
亮氨酸
丝氨酸
终止
终止
A
亮氨酸
丝氨酸
终止
色氨酸
G

请根据表Ⅰ、表Ⅱ分析回答下列问题:

(1)由野猪和家猪的该mRNA片段翻译成多肽分子中可能存在氨基酸的种类分别为____ 和    。

(2)比较上表密码子和氨基酸的关系,可以作出哪些推断?

①                                    ;

②                                    ;

③                                    。

(3)在决定野猪该信使RNA片段第一个密码子的DNA三个碱基对中,任意一个碱基对发生变化都将产生异常的蛋白质吗?为什么?有何生物学意义?

答:       ;理由:                        

生物学意义:                               。

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