攻读硕士研究生入学考试题

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分析化学 中国科学院大学硕士研究生入学考试试题

分析化学 中国科学院大学硕士研究生入学考试试题

中国科学院大学2020年招收攻读硕士学位研究生入学统一考试试题科目名称:分析化学考生须知:1.本试卷满分为150分,全部考试时间总计180分钟。

2.所有答案必须写在答题纸上,写在试题纸上或草稿纸上一律无效。

3.可以使用无字典存储和编程功能的电子计算器。

一、单项选择题(每题2分,共40分)1衡量样本平均值的离散程度应采用A变异系数B标准偏差C全距D平均值的标准偏差2下列关于有效数字说法错误的是A 分析化学计算中,倍数、分数关系的有效数字位数可认为没有限制B 有效数字的位数,直接影响测定的相对误差C 有效数字位数越多,表明测量越准确D 在分析工作中实际上能测量到的数字为有效数字3 甲基橙的变色范围为pH = 3.1 ~ 4.4(p K a = 3.4),若用0.1 mol·L-1 NaOH滴定0.1 mol·L-1的HCl,则看到混合色时,[In-]/[HIn]的比值为A 1.0B 2.0C 0.5D 10.04 配置pH = 9.0的缓冲溶液,缓冲体系最好选择A一氯乙酸(p K a = 2.86)~一氯乙酸盐B氨水(p K b = 4.74)~氯化铵C六亚甲基四胺(p K b = 8.85)~盐酸D醋酸(p K a = 4.74)~醋酸盐5 某碱样溶液,以酚酞为指示剂,用盐酸标准溶液滴定至终点时,耗去的体积为V1,继续以甲基橙为指示剂滴定,又耗去盐酸的体积为V2,若V2小于V1,则此碱样溶液是A Na2CO3B NaOH + Na2CO3C Na2CO3 + NaHCO3D NaHCO36 对于不可逆电对而言,实测电势与理论计算值存在一定差异的原因是A 不可逆电对一般为含氧酸,实际电势较难测准B 不可逆电对一般不对称,因此存在差异C 不可逆电对反应速度较慢,无法达到平衡状态D 不可逆电对的氧化态和还原态无法达成动态相互转化7 对于下列氧化还原反应的滴定曲线,化学计量点处于滴定突跃中点的是A 2Fe3+ + Sn2+ = 2Fe2+ + Sn4+B Ce4+ + Fe2+ = Ce3+ + Fe3+C Cr2O72- + 6Fe2+ + 14H+ = 2Cr3+ + 6Fe3+ + 7H2OD I2 + 2S2O32- = 2I- + S4O62-8 如不知所测样品的组分,若要想检验方法有无系统误差,应采取的方法是A 加入回收实验B 人工合成试样C 多次测量D 标准试样9有一瓶看不到明显颜色的溶液,其与分光光度测定有关的正确说法是A 不能进行光度分析B 显色后可进行光度分析C 光度分析灵敏度低D 无法判别是否能进行光度分析10 微量稀土离子可以通过生成CaC2O4来进行共沉淀分离,它属于A 利用生成混晶进行共沉淀分离B 利用形成离子缔合物进行共沉淀分离C 利用生成螯合物进行共沉淀分离D 利用表面吸附作用进行共沉淀分离11 在萃取分离过程中,判断分离难易程度的参数是A 分配系数B 回收率C 分离因子D回收因子12 用含少量Cu2+离子的蒸馏水配制EDTA溶液,于pH = 5.0时,用锌标准溶液标定EDTA溶液的浓度。

北京化工大学2020年攻读硕士学位研究生入学考试化工原理(含实验)样题

北京化工大学2020年攻读硕士学位研究生入学考试化工原理(含实验)样题

北京化工大学攻读硕士学位研究生入学考试化工原理(含实验)样题(满分150分)注意事项:1、答案必须写在答题纸上,写在试题上均不给分。

2、答题时可不抄题,但必须写清题号。

3、答题必须用蓝、黑墨水笔或圆珠笔,用红色笔或铅笔均不给分。

一、填空题(每空1分,共计22分)1、用孔板流量计测量流体流量时,随流量的增加,孔板前后的压差值将;若改用转子流量计,转子前后压差值将。

2、离心分离因数K C 是指。

3、当颗粒雷诺数Re p 小于时,颗粒的沉降属于层流区。

此时,颗粒的沉降速度与颗粒直径的次方成正比。

4、一般认为流化床正常操作的流速范围在与之间。

5、聚式流化床的两种不正常操作现象分别是和。

6、对固定管板式列管换热器,一般采取方法减小热应力。

7、在逆流操作的吸收塔中,当吸收因数A>1时,若填料层高度h0趋于无穷大,则出塔气体的极限浓度只与和有关。

8、精馏塔设计时,若将塔釜间接蒸汽加热改为直接蒸汽加热,而保持x F、D/F、q、R、x D 不变,则x W将,理论板数将。

9、工业生产中筛板上的气液接触状态通常为和。

10、在B-S部分互溶物系中加入溶质A组分,将使B-S的互溶度;恰当降低操作温度,B-S的互溶度将。

11、部分互溶物系单级萃取操作中,在维持相同萃余相浓度前提下,用含有少量溶质的萃取剂S′代替纯溶剂S,则所得萃取相量与萃余相量之比将,萃取液中溶质A的质量分数。

12、在多级逆流萃取中,欲达到同样的分离程度,溶剂比愈大则所需理论级数愈___ ___;当溶剂比为最小值时,理论级数为__________。

二、简答题(每小题3分,共计18分)1、离心泵启动前应做好哪些准备工作?为什么?2、影响过滤速率的因素有哪些?3、一包有石棉泥保温层的蒸汽管道,当石棉泥受潮后,其保温效果将如何变化?为什么?4、什么是精馏塔操作的最小回流比?影响最小回流比的主要因素有哪些?5、什么是填料塔的泛点和载点,测得泛点和载点的意义是什么?6、什么是临界含水量?它与哪些因素有关?三、计算题(25分)用离心泵将密度为1200kg/m3的溶液,从一敞口贮槽送至表压为57.33 kPa的高位槽中。

中国科学院大学硕士学位研究生入学统一考试试题:高分子化学与物理

中国科学院大学硕士学位研究生入学统一考试试题:高分子化学与物理

中国科学院大学2020年招收攻读硕士学位研究生入学统一考试试题科目名称:高分子化学与物理考生须知:1.本试卷满分为150分,全部考试时间总计180分钟。

2.所有答案必须写在答题纸上,写在试卷上或草稿纸上一律无效。

3.可以使用无字典存储和编程功能的电子计算器。

高分子化学部分(75分)一、名词解释(每小题2分,共10分)1. 无规剂2. 茂金属引发剂3. 共缩聚4. 扩链5. 微波引发聚合二、选择题(单选题,每小题2分,共20分)1.以下不互为结构异构体的是:(a)聚乙烯醇和聚氧化乙烯;(b)聚甲基丙烯酸甲酯和聚丙烯酸乙酯;(c)聚乙烯醇和聚乙二醇;(d)聚酰胺-66和聚酰胺-6。

2. 以下叙述正确的是:(a)悬浮聚合配方的主要成分是单体、水、水溶性引发剂、分散剂;(b)悬浮聚合的反应场所是溶液内;(c)悬浮聚合散热容易,可连续化;(d)工业上本体聚合可采用间歇法和连续法。

3. 有关自由基聚合过程的转化率-时间曲线类型叙述错误的是:(a)选用t1/2 = 2 h 的引发剂,苯乙烯有望接近匀速聚合;(b)S形曲线中的中期加速是凝胶效应超过正常速率的结果;(c)采用活性过高的引发剂,导致“死端聚合”。

4. 以下不能用阴离子聚合方法制备的物质是:(a)聚硝基乙烯;(b)聚甲基丙烯腈;(c)聚(氧化三亚甲基);(d)聚偏二氰基乙烯5. 聚四氟乙烯不具有:(a)电绝缘性;(b)耐腐蚀性;(c)化学稳定性;(d)易染色性能。

6. 以下叙述错误的是:(a)聚醋酸乙烯酯能转变成聚乙烯醇;(b)老化必然导致聚合物的分子量降低;(c)一般主链或侧链含有芳环的聚合物耐辐射;(d)270 o C时聚甲基丙烯酸甲酯可以全部解聚成单体。

7. 不同大小环烷烃的热力学稳定性次序为:(a)3 < 6 < 8;(b)8 < 6 < 3;(c)3 < 8 < 6;(d)8 < 3 < 6。

北科大试题

北科大试题

2001北京科技大学攻读硕士研究生入学考试试题考试科目:金属学A适用专业:科学技术史,冶金物理化学,钢铁冶金,有色金属,材料加工工程。

说明:1.试题必须写在答题纸上。

2.统考生做1--10题;单考生做1--7题和11--13题。

1.名词解释:(每小题2分,共10分)(1)单胞和复合单胞(2)金属键(3)代位固溶体(4)位错(5)偏聚和有序化2.判断对错:(10分)3.以液态无限互溶、固态有限溶解并具有共晶反应的二元相图为例说明二元相图是制作方法和二元相图的一般几何规律。

(10分)4.结晶后的组织中产生显微偏析的原因是什么?采用什么措施能减少和消除偏析。

(10分)5.什么是晶界?讨论晶界在多晶体形变过程中的作用。

(10分)6.什么是相界面?复合合金形变的特点是什么?(10分)7.说明使多晶体晶粒细化能使材料的强度提高、韧性增加的原因。

(10分)8.简要叙述马氏体转变的一般特点。

(10分)9.要想获得粗大的再结晶晶粒可采取什么措施,说明原因。

(10分)10.简述固态相变在相变阻力、新相形核、新相成长方面的特点。

(10分)11.什么叫再结晶?什么是再结晶温度?简要描述再结晶过程。

(10分)2002北京科技大学攻读硕士研究生入学考试试题考试科目:金属学A适用专业:科学技术史,冶金物理化学,钢铁冶金,有色金属,材料加工工程。

说明:1.试题必须写在答题纸上。

2.统考生做1--9题;单考生做1--6题和10--12题。

一.名词解释(20分,每个2.5分)(1)点阵畸变(2)柏氏矢量(3)相图(4)过冷度(5)形变织构(6)二次再结晶(7)滑移系(8)孪生二.画出立方晶系中(111)面、(435)面。

写出立方晶系空间点阵特征。

(10分)三.铸锭的一般组织可分为哪几个区域?写出其名称。

并简述影响铸锭结晶组织的因素。

(10分)四.画图并简述形变过程中位错增殖的机制。

(10分)五.写出菲克第一定律的数学表达式,并说明其意义。

普通物理(乙) 中国科学院大学硕士研究生入学考试试题

普通物理(乙) 中国科学院大学硕士研究生入学考试试题

中国科学院大学2020年招收攻读硕士学位研究生入学统一考试试题科目名称:普通物理(乙)考生须知:1.本试卷满分为150分,全部考试时间总计180分钟。

2.所有答案必须写在答题纸上,写在试题纸上或草稿纸上一律无效。

一、单项选择题(共32 分,每小题4 分)1. 若作用于一质点系上的外力的合力为零,下列说法正确的是:(A). 质点系的动量守恒、角动量不一定守恒、机械能不一定守恒。

(B). 质点系的动量守恒、角动量守恒、机械能不一定守恒。

(C). 质点系的动量守恒、角动量守恒、机械能守恒。

(D). 质点系的动量不一定守恒、角动量不一定守恒、机械能不一定守恒。

2. 自然界中存在四种基本作用力,下面不属于四种基本力的是:(A). 引力。

(B). 弱相互作用力。

(C). 电磁力。

(D). 弹性力。

3. 波源S的振动频率为f0,所发出波在介质中传播速度为 u (远小于光速)。

波源S相对介质运动,速度大小为v S,方向朝向观察者B。

观察者B也相对介质运动,速度大小为v B,方向朝向波源S。

波源和观察者的运动速度大小均小于波速 u,则观察者接受到的频率为:(A). (u+v S)f0/(u−v B)。

(B). (u−v B)f0/(u−v S)。

(C). (u+v B)f0/(u−v S)。

(D).(u−v S)f0/(u−v B)。

4. 当一个带电导体达到静电平衡时,下列说法正确的是:(A).表面上电荷密度较大处电势较高。

(B). 表面曲率较大处电势较高。

(C).导体内部的电势比导体表面的电势高。

(D).导体内任一点与其表面上任一点的电势差等于零。

5. 在下图的电路系统中,电流为I,方向从 a 到 b,电源的电动势大小为 ε,内阻忽略不计。

则 a、b 两端的电势差(U a−U b)为:(A). ε−IR。

(B). IR+ε。

(C). −ε+IR。

(D). −IR−ε。

6. 在感应电场中电磁感应定律可写成∮E⃑K•dll=−dΦ/dt,式中E⃑K为感应电场的电场强度。

四川大学外国语学院攻读硕士学位研究生入学考试参考样题

四川大学外国语学院攻读硕士学位研究生入学考试参考样题

Part One I.
European and American Cultures (50 points)
Explain any THREE out of the following five terms IN ABOUT 50 WORDS each: (15 points) William the Conqueror Homer The War of Roses Martin Luther The melting pot
1. 2. 3. 4. 5.
II. Fill in the blanks in the following to complete the idea: (10 points) 1. The full name of the United Kingdom is _____________________ . 2. Thanksgiving Day falls on _______, on which Americans give thanks for _ _____; the _. executive
5. The Bible is a collection of religious writings comprising two parts: the __________________ and the__________________. 6. The word “Renaissance” means _______________, it generally refers to the period in
本题共 5 页,此页为第 1 页
四川大学外国语学院攻读硕士学位研究生入学考试参考样题---英语专业综合知识
Western civilization between the ____________ and mid _______________century. 7. In the early 1930s, ___________________ brought poverty and humiliation to millions of people in the United States and Europe. 8. 9. The American War of Independence began in _____________ and ended in _________. The United States government form is based on the three main principles: Federalism, ___________________________________and ________________________________. 10. Henrik Ibsen was born in ________________, as the Father of Modern Drama he was famous for his “ __________ plays.”

攻读硕士学位研究生入学考试无机化学试题 (2)

攻读硕士学位研究生入学考试无机化学试题 (2)

第 1 页 共 3 页 攻读硕士学位研究生入学考试无机化学试题一 选择题 (共30分,每小题2分)1. 下列物质中,属于稳定单质的是 。

[A] C (金刚石); [B] S (l); [C] Br 2 (l); [D] Hg (s);2. 按照质子理论,下列水溶液中碱性最弱的是 。

[A] -3NO ; [B] -4ClO ; [C] 2-3CO ; [D] 2-4SO ;3. 把少量浓溶液Pb(NO 3)2加到饱和的PbI 2溶液中,下列结论正确的是 。

[A] 将使2PbI 沉淀增多; [B] 将使2PbI 的溶解度增大;[C] 将使2PbI 的溶解度降低; [D] 将降低2PbI 的溶度积;4. Fe(III) 形成配位数为 6 的外轨形配合物时,Fe 3+离子接受孤对电子的空轨道是 。

[A] d 2sp 3; [B] sp 3d 2; [C] p 3d 3; [D] sd 5;5. 在pH = 5.0 时,用EDTA 滴定含有Al 3+、Zn 2+、Mg 2+ 和大量F - 的溶液,则测得的是 。

[A] Al 3+、Zn 2+、Mg 2+ 的总量; [B] Zn 2+、Mg 2+ 的总量;[C] Mg 2+ 的总量; [D] Zn 2+的总量;6. 估计下列分子或离子中,键角最小的是 。

[A] 3NH ; [B] -3NO ; [C] 3NF ; [D] 3NCl ;7. 下列灭火器中,适用于扑灭电器失火的是 。

[A] CO 2灭火器; [B] CCl 4灭火器;[C] 泡沫灭火器; [D] 干粉灭火器;8. 用以检验Fe 2+离子的试剂是 。

[A] NH 4SCN ; [B] K 3[Fe(CN)6];[C] K 4[Fe(CN)6]; [D] H 2SO 4;9. 下列溶液中,当加入NaOH 溶液后,仅有颜色发生变化而无沉淀生成的是 。

[A] FeSO 4; [B] KMnO 4;[C] NiSO 4; [D] K 2Cr 2O 7;10. 下列溶解度大小关系正确的是 。

北京市攻读硕士学位研究生入学考试联合命题物理化学(2012年~2016年)

北京市攻读硕士学位研究生入学考试联合命题物理化学(2012年~2016年)

2012年攻读硕士学位研究生入学考试北京市联合命题物理化学试题(请将答案写在答题纸上,写在试题上的答案无效)一.选择正确的答案:(每小题2分,共计50分)1. 理想气体经可逆与不可逆两种绝热过程,则( A ) 可以从同一始态出发达到同一终态。

( B ) 不可以达到同一终态。

( C ) 不能确定以上A、B中哪一种正确。

( D ) 可以达到同一终态,视绝热膨胀还是绝热压缩而定。

2. ΔH=Q p此式适用于哪一个过程:( A ) 理想气体从101325Pa反抗恒定的10132.5Pa膨胀到10132.5Pa( B ) 在0℃、101325Pa下,冰融化成水( C ) 电解CuSO4的水溶液( D ) 气体从(298K,101325Pa)可逆变化到(373K,10132.5Pa )3. 在实际气体的节流膨胀过程中,哪一组描述是正确的:( A ) Q >0, ∆H=0, ∆p < 0 ( B ) Q=0, ∆H <0, ∆p >0( C ) Q=0, ∆H=0, ∆p <0 ( D ) Q <0, ∆H=0, ∆p <04. 对于等容等熵且不做非体积功的封闭系统的自发过程,下列关系肯定成立的是:( A ) ∆G < 0 ( B ) ∆A < 0( C ) ∆H < 0 ( D ) ∆U < 05. 已知反应C(s) + O2(g) =CO2(g) 的△H,下列说法中,何者不正确?( A ) △H为CO2(g)的生成热;( B ) △H是C(g)的燃烧热;( C ) △H 与反应的△U数值不等;( D ) △H 与反应的△U数值相等;6. 理想气体从状态p1,V1,T等温膨胀到p2,V2,T,此过程的∆A与∆G 的关系为( A ) ∆A> ∆G ( B ) ∆A< ∆G ( C ) ∆A = ∆G( D ).无确定关系7. 已知A,B两液体可组成无最高或无最低恒沸点的液态完全互溶的系统,则将某一组成的溶液蒸馏可以获得:(A)一个纯组分和一个恒沸混合物;(B)两个恒沸混合物;(C)两个纯组分。

2020年中国科学院大学硕士学位研究生入学统一考试试题(生物化学(乙))

2020年中国科学院大学硕士学位研究生入学统一考试试题(生物化学(乙))

中国科学院大学2020年招收攻读硕士学位研究生入学统一考试试题中国科学院大学2020年招收攻读硕士学位研究生入学统一考试试题科目名称:生物化学(乙)考生须知:1.本试卷满分为150分,全部考试时间总计180分钟。

2.所有答案必须写在答题纸上,写在试题纸上或草稿纸上一律无效。

一、选择题(共40分,每小题1分)(第1~30小题,请从4个选项中选出1个正确答案;第31~40小题,请从4个选项中选出1个或多个正确答案)1.丙酮酸羧化酶是哪一个代谢途径的关键酶A、糖异生B、磷酸戊糖途径C、血红素合成D、脂肪酸合成2.mRNA是蛋白质生物合成的A、模板B、“装配机”C、起动因子D、供能物质3.某种酶活性需以-SH为必需基团,下列哪种物质可以保护此酶不被氧化A、CysB、GSHC、尿素D、离子型去污剂4.哺乳动物核糖体大亚基的沉降系数是A、40SB、70SC、30SD、60S5.胰高血糖素使血糖浓度升高,不是由于A、促进肌糖原分解为葡萄糖B、促进肝糖原分解为葡萄糖C、促进糖异生作用D、加速脂肪动员,抑制周围组织摄取葡萄糖6.甘油磷脂的合成必须有下列哪种物质参加A、CTPB、UTPC、UMPD、GMP7.在体内能分解生成β-氨基异丁酸的是A、A MPB、GMPC、TMPD、UMP8.α-螺旋每上升一圈相当于几个氨基酸残基A、4.5B、3.6C、2.7D、3.09.翻译过程的产物是A、蛋白质B、tRNAC、mRNAD、rRNA10.重组DNA的连接方式不包括A、平头末端连接B、粘性末端连结C、同聚物加尾连接D、粘性末端与平头末端连接11.由葡萄糖合成糖原时,每增加1个葡萄糖单位消耗高能磷酸键数为A、1B、2C、3D、412.6-磷酸葡萄糖脱氢酶催化的反应中,直接受氢体是A、NADPB、FMNC、FADD、NAD13.可水解动物糖原分支处的键的酶是A、分支酶B、麦芽糖酶C、α-临界糊精酶D、脱支酶14.合成脂肪酸的乙酰-CoA是通过进入细胞溶胶的A、柠檬酸-丙酮酸循环B、丙氨酸-葡萄糖循环C、鸟氨酸循环D、乳酸循环15.属于营养必需脂肪酸的是A、亚麻酸B、软脂酸C、硬脂酸D、月桂酸16.下列哪个反应需硫辛酸参与A、糖酵解B、乙酰CoA羧化酶催化的反应C、α-酮戊二酸的转氨基作用D、丙酮酸的氧化脱羧作用17.关于苯丙氨酸描述错误的是A、人体内苯丙氨酸可以转变为酪氨酸B、属于芳香族氨基酸C、人体内酪氨酸可生成苯丙氨酸D、苯丙氨酸是必需氨基酸18.在生理pH条件下带正电荷的氨基酸是A、亮氨酸B、色氨酸C、丙氨酸D、赖氨酸19.能对乙酰CoA羧化酶产生反馈抑制的是A、柠檬酸B、异柠檬酸C、ATPD、长链脂酰CoA20.参与大肠杆菌复制起始过程的酶中,下列哪一组是正确的A、DNA-polⅠ、DNA内切酶B、DNA外切酶、连接酶C、RNA酶、解螺旋酶D、蛋白Dna、单链结合蛋白21.关于真核生物mRNA中的启动信号,正确的叙述是A、常在mRNA的3'端B、mRNA启动部位的AUGC、mRNA中任一AUGD、苯丙氨酸的密码子22.催化dUMP转变为dTMP的酶是A、核苷酸还原酶B、胸苷酸合酶C、核苷酸激酶D、甲基转移酶23.对α-螺旋的下列描述哪一项是错误的A、通过疏水键维持稳定B、通过侧链(R基团)之间的相互作用维持稳定C、通过分子内肽键之间的氢键维持稳定D、是蛋白质的一种二级结构类型24.1分子葡萄糖经糖酵解产生的3-磷酸甘油醛在3-磷酸甘油醛脱氢酶作用下脱下的氢A、进入呼吸链生成5分子ATPB、进入呼吸链生成3分子ATPC、进入呼吸链生成4分子ATPD、以上均不对25.用实验证实DNA半保留复制的学者是A、Watson和CrickB、SangerC、KornbergD、Messelson和Stahl26.下述有关糖原代谢叙述中,哪个是错误的A、cAMP激活的蛋白激酶促进糖原合成B、磷酸化酶激酶由磷酸化作用被活化C、磷酸化酶b由磷酸化作用被活化D、肾上腺素和胰高血糖素活化腺苷环化酶从而使cAMP水平升高27.有关tRNA分子的正确解释是A、tRNA分子多数由80个左右的氨基酸组成B、tRNA的功能是结合蛋白质合成所需要的各种辅助因子C、氨基酸臂接受活化的氨基酸D、反密码环中的反密码子可以结合DNA中相互补的碱基c阻遏蛋白结合乳糖操纵子的是A、P序列B、O序列C、CAP结合位点D、I基因29.酶的比活力是指A、以某种酶的活力作为1来表示其他酶的相对活力B、任何纯酶的活力与其粗酶的活力比C、每毫克蛋白所含的酶活力单位数D、一种酶与另一种酶的活力比30. 各种不同的底物都借助于同一呼吸链传递电子至氧是因为A、底物在线粒体被氧化B、许多底物的氧化与NAD或FAD为辅助因子氧化酶有关C、底物通过一些酶类全部被氧化D、来自各种底物的电子全部都传递给共同的电子受体(第31~40小题,请从4个选项中选出1个或多个正确答案)31.含高能磷酸键的化合物是A、3-磷酸甘油醛B、1,3-二磷酸甘油酸C、磷酸肌酸D、磷酸烯醇式丙酮酸32.对作为载体的质粒描述正确的是A、分子量相对小B、用作基因工程载体的常是接合型质粒C、常用的质粒载体有pBR322和pUC系列等D、在复制子以外的适当位置,存在几个单一的限制性内切核酸酶位点33.通过影响第二信使cAMP含量发挥代谢调节作用的激素有A、胰岛素B、胰高血糖素C、性激素D、肾上腺皮质激素34.使蛋白质沉淀但能避免变性的方法有A、中性盐沉淀蛋白B、鞣酸沉淀蛋白C、低温乙醇沉淀蛋白D、三氯醋酸沉淀蛋白35.线粒体内的生物氧化酶类包括A、氧化酶类B、需氧脱氢酶类C、加单氧酶类D、过氧化物酶类36.变构酶的动力学特点是A、v对[S]作图呈S型B、v对[S]作图呈抛物线型C、v对[S]作图呈直线D、初速度对[S]关系不符合米氏方程37.RNA水解后可得到产物为A、磷酸B、核糖C、胸腺嘧啶D、腺嘌呤38.复制和转录的共同点有A、需要原料NTPB、都是以DNA为模板的C、DNA双链的全部信息都可以被复制和转录D、遵守碱基配对原则39.下述操作可能用于DNA克隆过程的是A、DNA的制备和酶解B、不同来源DNA的拼接C、核酸分子杂交D、细菌的生长和繁殖40.对钙调蛋白描述正确的是A、与Ca2+具有专一性和亲和力B、与Ca2+形成复合物才有活性C、调节作用与Ca2+的浓度有关D、肌肉中磷酸化酶激酶受其抑制二、填空题(共30分,每空2分)1. 单糖是多羟基的或。

中国药科大学攻读硕士学位研究生入学考试生物化学1997-2005试题

中国药科大学攻读硕士学位研究生入学考试生物化学1997-2005试题

中 国 药 科 大 学 1997年攻读硕士学位研究生入学考试生物化学(一)试题(注;答案必须写在答题纸上,写在试题上无效)一、单项选择题;(每题2分,共24分)1. 维持DNA双螺旋结构稳定的最主要力是(1)氢键(2)碱基堆积力(3)盐键(4)磷酸二酯键2. 可能具有催化活性的物质包括(1)仅仅蛋白质(2)仅仅RNA(3)蛋白质和RNA(4)蛋白质和DNA(5)蛋白质、DNA和RNA3. 下列哪一种物质不是酮体:(l)α-酮戊二酸(2)乙酰乙酸(3)丙酮(4)β-羟基丁酸4. 下列哪一种方法不能测定蛋白质的分子量(1)超速离心法(2)SDS凝腔电诛法(3)凝胶过滤法(4)等电聚焦法(5)渗透压法5.在糖酵解过程中下列哪一种酶不是调节酶(1)己糖激酶(2)磷酸果糖激酶(3)丙酮酸激酶(4)磷酸甘油酸激酶(5)磷酸化酶6.胰岛素不具备下列哪种功能(1)促进肝糖原和肌糖原合成(2)引起cAMP增加(3)影响细胞通透性(4)促进脂肪酸合成(5)促进蛋白质合成7.呼吸链中不含有下列哪种物质(1)泛醌(2)黄素蛋白(3)细胞色索c(4)细胞色素P450(5)铁硫蛋白8.引起痛风的物质是(1)黄嘌吟(2)次黄嘌吟(3)鸟嘌呤(4)尿酸(5)苯丙酮酸9.纤维素分子结构中含有(1) β-1,4糖苷键(2) α-l,4糖苷键(3) α-1,6糖苷键(4) β-1,6糖苷键10. 合成嘌呤核苷酸的关键酶是(1) PRPP合成酶(2) 磷酸核糖酰胺转移酶(3) 次黄嘌呤核苷酸环水解酶(4) 甘氨酰胺核苷酸转甲酰基酶11.下列哪种氨基酸为酸性氨基酸(l) Phe(2) Lys(3) Met(4) Asp(5) Trp12.唾液淀扮酶经透析后,其水解淀粉的能力显著降低,其原因(1)酶蛋白变性(2)失去了辅酶(3)消耗了ATP(4)失去了氯离子(5)酶含量显著减少二,名词解释( 每题4分,共48分 )1.Hybridization2.Conjugated protein3.Isoelectric point of amino acid4.Posttranscriptional modification5.Monoclonal antibody6.electrofocusingctose operon8.Okazaki fragments9.β-oxidation10. Central dogma11. Allosteric enzyme12.Gel filtration chromatography三、问笞题(每题14分,共28分)1,糖、脂类及氨基酸代谢之间有密切联系,试述这些物质代谢中有哪些关键点,各自的作用如何?2,根据蛋白质结构和功能的关系,如何指导我们利用基因工程来设计蛋白质类药物中 国 药 科 大 学 1998年攻读硕士学位研究生入学考试生物化学(一)试题编号(注;答案必须写在答题纸上,写在试题上无效)一、单项选择题;(每题2分,共24分)1.过量吸入一氧化碳会中毒致死,是园为(1)CO是血红素合成的强烈抑制剂(2)CO是珠蛋白合成的强烈抑制剂(3)CO与HB辅基中Fe3+结合占据O2结合位(4)CO与HB辅基中Fe2+结合占据O2结合位2.人体排泄嘌呤分解代谢的终产物是(1)尿囊酸(2)乳清酸(3)尿素(4)尿酸(5)黄嘌呤3.苯丙酮酸尿症是下列哪个酶的缺陷(1)酪氨酸酶(2)苯丙氨酸羟化酶(3)尿素(4)尿酸(5)黄嘌呤4.在脂肪酸β-氧化过程中将长链脂酰基载入线粒体的载体是(1)ACP(2)肉毒碱(3)柠檬酸..(4)乙酰肉毒碱5. 凝胶层析分离蛋白质是运用下列哪种原理(1)带电状态不同(2)分子大小不同(3)分子和配基间的亲和力(4)溶解度的差异6.糖酵解的特点之一是(1)需氧参加(2)乳酸不能再利用(3)无氧化还原反应(4)能产生少量二氧化碳(5)净产生少量能量(约为有氧氧化的1/18-1/19)7. 胰蛋白酶水解肽键的专-性取决于(1)酸性氨基酸残基的羧基所构成的肽键(2)碱性氨基酸残基的羧基所构成的肽键(3)酸性氨基酸残基的氨基所构成的肽键(4)碱性氨基酸残基的氨基所构成的脓键(5)芳香族氨基酸残基的羧基所构成的肽键(6)芳香族氨基酸残基的氨基所构成的肽键8. DNA复制需如下条件,但例外的是(1)DNA模板(2)RNA引物(3)dNTP原料(4)各反应均由酶催化(5)新合成的互补链的延长方向是3'→5'9.下列关于高密度脂蛋白(HDL)的叙述哪一顶是正确的。

华南理工大学 攻读硕士学位研究生入学考试试卷 分析化学

华南理工大学 攻读硕士学位研究生入学考试试卷 分析化学
D.用Volhard法测定I-时,指示剂铁铵钒需要在加入AgNO3后加入;
_____________________________________________________________。
2.在少量数据的统计处理中,当测定次数相同时,置信度水平越高,置信区间越________,包含真值的可能性越________。
7.用0.02 molL-1的EDTA滴定同浓度的Cu2+,pH最高允许上限是____________(已知 )
8.已知 ,而 =0.77 V, =0.535V,则其理论平衡常数(25℃)为lgK=__________。
9.在以二苯胺磺酸钠为指示剂,K2Cr2O7为氧化剂滴定Fe2+时,加入H3PO4-H2SO4中H3PO4的作用为(1)________________;(2)________________。
一.单项选择题(共20题,每空1.5分,共计30分)
1.配制500 mL 0.2 molL-1NaOH溶液需要固体NaOH(MNaOH=40.00):
A. 40 gB. 0.4 gC. 4.000 gD. 4 g
2.以下各项措施中,不能校正系统误差的是:
A.校正仪器B.作对照试验
C.作空白试验D.增加平行测定次数
3.提高萃取效率的首选途径是:
A.提高被萃取物的浓度B.增加萃取次数
C.增加萃取剂的体积D.控制溶液温度
4.测得某种新合成的有机酸pKa值为12.35,其pKa值应表示为:
A. 4.46710-13B. 4.4710-13C. 4.510-13D. 410-13
5.法扬司法所用指示剂的作用原理是:
A.指示剂的氧化态与还原态颜色不同B.指示剂的吸附态与游离态颜色不同C.指示剂的配合态与游离态颜色不同D.指示剂的酸式与碱式颜色不同பைடு நூலகம்

北京化工大学2020年攻读硕士学位研究生入学考试《信号与系统》样题

北京化工大学2020年攻读硕士学位研究生入学考试《信号与系统》样题

北京化工大学攻读硕士学位研究生入学考试《信号与系统》样题注意事项:⒈答案(包括有关图)必须写在答题纸上,写在试题上均不给分。

⒉答题时可不抄题,但必须写清题号。

⒊答题时用蓝、黑墨水笔或圆珠笔,用红色笔或铅笔均不给分。

一、填空题(每题3分,共45分) (1)积分()()2tet t dt δ∞--∞++=⎰。

(2)序列5()cos()134x n A n ππ=+的周期N = 。

(3)设有一线性时不变系统(起始时刻无储能),当激励输入1()()e t u t =时,响应1()()at r t e u t -=,则当激励输入2()()e t t δ=时,响应2()r t = 。

(4)单位冲击响应分别为1()h t 和2()h t 的两个子系统的并联系统和级联系统的单位冲击响应分别为 和 。

(5) 若连续系统的单位冲激响应函数(1)2h -=,则该系统是 (因果,非因果)系统。

(6)系统的零状态响应的时域表达式中 称为强迫响应, 称为自由响应,其中i p 是系统函数的极点,l p 是激励信号的极点。

(7)周期为0T 的周期信号()f t 的指数形式的傅立叶级数为00()()jn tn f t F n eωω∞=-∞=∑,其中复数频谱0()F n ω= 。

(8)已知某一LTI 系统对输入激励()e t 的零状态响应2()(1)t zs t r t e e d τττ∞--=⋅-⎰,则该系统的单位冲击响应为()h t = 。

(9)已知信号()f t 的频谱函数为()F ω,则(35)f t -的频谱密度函数为 。

(10)矩形脉冲信号()()()22f t E u t u t ττ⎡⎤=+--⎢⎥⎣⎦的傅立叶变换()F ω= 。

(11)单个脉冲幅度不变而持续宽度越窄,则它的频谱宽度 。

(12)线性时不变因果系统的系统函数54()(3)(2)(2)s H s s s j s j -=++++-,则该系统是 (稳定、不稳定)的。

兰州大学2021年攻读硕士研究生入学考试试题

兰州大学2021年攻读硕士研究生入学考试试题

兰州大学2021年攻读硕士研究生入学考试试题兰州大学2021年攻读硕士研究生入学考试试题专业:汉语言文字学科目:现代汉语和语言学概论一、填空(30分)1. 现代汉民族共同语称为(),以典范的()作为语法规范。

2. 声调、语调的不同,主要是语音要素中的()不同变化决定的。

语言中的重音、轻音主要是由于语音四要素中的()不同所致。

3. 普通话中的送气塞擦音声母用汉语拼音表示分别是()。

舌面后音声母用国际音标表示分别是()。

4. 普通话中词语“演讲”在实际语流中的调值用数字表示分别是()。

5. 从造字法来来看,“氢”属于()字,“双”中的第二笔属于5种笔画当中的()。

6. “参差、方圆、蝴蝶、沙发”四个词中,有一个词的构词方式与另外三个不同,这个词是()。

“石头、木头、马头、苦头”四个词中,有一个词的构词方式也另外三个不同,这个词是()。

7. “他病了三天了”“他是会来的”“他打过电话”以上三句话中,加线词有一个词性与另外两个不同,这个词是()。

8. “有人不同意”属于()结构的短语,“获得丰收”属于()结构的短语。

9. “不是鱼死,就是网破。

”属于()关系复句,“事实总是事实,不管你信不信。

”属于()关系复句。

10. 北京话中/t/的区别特征是(),英语中/t/的区别特征是()。

11. 根据语素在词中的不同作用可以将它分为三类,英语单词readers中,read、er、s分别是这三类语素中的()。

12. 基本词汇具有稳固性、()性和()性三个特点。

13. 法语、俄语都属于()语系,维吾尔语、哈萨克语都属于()语系。

14. 从语法结构类型分析,汉语、日语分别属于()语和()语。

15. “狮子、鼠标、胡同、罗汉”四个词中,属于外来词的是()。

二、举例解释下列名词术语(35分)儿化表音文字义素句类双关语言符号的任意性克里奥耳语三、简答题(50分)1. an、ian、uan、üan四个韵母的韵腹用国际音标表示分别是什么?为什么在汉语拼音中可以用一个字母拼写这些不同的元音?2. 汉语中动词和形容词的语法特性有何不同?请举例说明。

暨南大学2020年硕士研究生入学考试真题803西方经济学

暨南大学2020年硕士研究生入学考试真题803西方经济学

2020年招收攻读硕士学位研究生入学考试试题(A卷)
********************************************************************************************
学科、专业名称:政治经济学、西方经济学、世界经济、人口资源与环境经济学、国民经济学、区域经济学、财政学、金融学、国际贸易学、劳动经济学、数量经济学、统计学、产业
经济学、劳动经济学
研究方向:
考生注意:所有答案必须写在答题纸(卷)上,写在本试题上一律不给分。

一、选择题(共10小题,每小题3分,共30分)
1. 某人消费若干数量的商品,如果他对该商品的需求收入弹性为3,需求价格弹性为-2,那么当价格下降5%且同时收入也下降3%时,他对该商品的需求量将()
A. 不变
B. 增加
C. 减少
D. 以上情况皆有可能
2. 无差异曲线为一条斜率为负的直线,说明()
A. 商品是完全替代的
B. 边际效用递减
C. 偏好是非凸的
D. 偏好不满足传递性
3. 一个垄断企业以12美元的价格可销售8单位产品,以13美元的价格可销售7单位产品,则与第8单位产品对应的边际收益是()
A. 5美元
B. 12美元
C. 1美元
D. 6美元
4. 适合采取“薄利多销”定价策略的商品是()
A. 农产品
B. 生活必需品
C. 富有弹性的商品
D. 单位弹性商品
5. 当生产函数Q=F(L)的AP(平均产出)为正且递减时,MP(边际产出)可以是()
A. 递减且大于AP
B. 递减且小于AP
C. 递增且大于AP。

硕士学位研究生入学考试试题 (22)

硕士学位研究生入学考试试题 (22)

硕士学位研究生入学考试试题
一、选择题(共10题,每题3分,共30分,请在每题的3个选项中选择1个最适合的)。

1、不属于聚合物晶体基本形态的是()
A、球晶
B、折叠链片晶
C、伸直链晶体
2、高分子不可能存在的相态是()
A、液晶态B液态C气态
3、高分子链刚性越大,其等效自由结合链的链段长度()
A、越长
B、越短
C、不变
4、结晶聚合物的熔融过程是()
A、放热过程
B、力学状态转变过程
C、热力学相变过程
5、聚合物的theta溶剂是其()
A、良溶剂
B、不良溶剂
C、良溶剂与不良溶剂的分界
6、聚合物的结晶度降低,性能也降低的是()
A、透明性
B、拉伸强度
C、冲击强度
7、可使聚合物玻璃化转变温度提高的方法是()
A、主链上添加孤立双键
B、主链上添加杂原子
C、使分子链交联
8、熔融指数(MI)如下的相同分子结构聚合物流动性最差的是()
A、2
B、5
C、8
9、外力作用频率提高,玻璃化转变温度()
A、增高
B、降低
C、基本不变
10、以下聚合物中,内聚能密度最低的是()
A、橡胶
B、塑料
C、纤维
二、判断题(共10题,每题2分,共20分,请对正确的说法划“√”,对错误的说法划“×”)。

1、玻璃化转变温度的高低与测定方法密切相关,是一个变化较大的值。

()
2、除去外力后,交联聚合物的蠕变一般不能完全回复。

()
1。

研究生入学考试-苏州大学考研真题

研究生入学考试-苏州大学考研真题

苏州大学考研真题苏州大学二〇〇七年攻读硕士学位研究生入学考试试题专业名称:政治经济学、世界经济、区域经济学、产业经济学、国际贸易、财政学考试科目:微观与宏观经济学(A)卷一、名词解释(每题5分,共20分)1、基尼系数、2、公共物品、3、货币乘数4、挤出效应二、简答题1、什么是逆向选择和道德风险?试举例说明2、什么是垄断的社会福利损失?并画图说明3、试证明当平均成本等于边际成本时,平均成本最低。

4、简述一般均衡的涵义及其实现条件5、简述国民生产总值的涵义及其核算方法6、影响IS曲线斜率的因素是什么7、简述通货膨胀的类型及其成因8、利用总需求曲线说明物价与国民收入的关系三、计算题(每题10分,共20分)1、假设某厂商的长期函数为Q=1.2A0.5B0.5,Q为每月产量,A、B为投入的生产要素。

三种要素的价格分别为P a=1美元,P b=9美元。

推导出厂商的长期总成本函数、长期平均成本函数和长期边际成本函数。

2、假定经济中的短期生产函数为Y=14N-0.04N^2,劳动需求函数为N d=175-12.5(W/P)。

试求当N5=70+5(W/P)、P=1和P=1.25时的就业量(N)和名义工资(W)和产量(Y)。

四、论述题(每题15分,共30分)1、什么是规模经济和范围经济?它们会在同一企业中发生吗?2、凯恩斯是如何论述非充分就业均衡的?(B)卷一、名词解释(每题5分,共20分)1、交易费用2、边际生产力3、政府购买乘数4、全要素生产率二、简答题(每题10分,共80分)1、简述完全竞争市场中停止营业点的条件2、简述差别定价的含义和条件3、简述规模经济和范围经济的含义和成因4、简述垄断的危害及其治理对策5、决定货币供应量的因素是什么?6、利用IS-LM模型说明利率与国民收入的关系7、简述凯恩斯的货币需求函数8、简述成熟市场经济中失业的含义及其类型三、计算题(每题10分,共20分)1、某产品的需求函数为Qd=60-2P,供求函数为Qs=30+3P。

马克思主义历年招收攻读硕士研究生入学考试题

马克思主义历年招收攻读硕士研究生入学考试题
2.自然规律与社会规律的区别有哪些?
3.简述社会存在与社会意识的辩证关系。
三、论述题(每小题30分,共60分)
1.结合我国改革开放的实际,从认识论上论届中央委员会第六次全体会议提出,我们党来自人民,失去人民拥护和支持,党就会失去根基。必须把坚持全心全意为人民服务的根本宗旨、保持党同人民群众的血肉联系作为加强和规范党内政治生活的根本要求。全党必须贯彻党的群众路线,为群众办实事、解难事,当好人民公仆。
招收攻读硕士研究生入学考试题
考试科目名称:马克思主义哲学原理
说明:考生答题时一律写在答题纸上,否则漏批责任自负。
一、名词解释题(每小题6分,共30分)
1.一元论与二元论
2.现象和本质
3.能动的反映论
4.社会形态
5.真理的相对性
二、简答题(每小题20分,共60分)
1.为什么说否定之否定是事物的自我发展和自我完善?
请你运用历史唯物主义的人民群众观论述为什么中国共产党要贯彻党的群众路线。(30分)
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杭州师范大学201工年招收攻读硕士研究生入学考试题考试科目名称:综合英语(二) 说明:考生答题时一律写在答题纸上,否则漏批责任自负。

I. Fill in the blanks with proper words given below and write the correct ones o your answer sheet: 10 %A) remai nF) p racticalK) later It would be pleasant to believe that all young girls in the past got married for 1 reas ons; but the fact is that many of them regarded marriage as their only cha nee to gain_ rom their paren ts, to have pro vider, or to be assured of a p lace in society. A couple of gen erati ons ago, an old maid of 25 did not have much to look forward to, she was more or less fated to_3jwith her parents or to live in some relative 'home where she would help with the chores and the childre n. Not so any more. In the first pl ace, wome n rema in young much Ion ger tha n they used to, and aD_4 woma n of 28 or 30 does not feel that her life is over. Besides, since she is probably working and supporting herself, she is free to marry only whe n and if she chooses. As a con seque nee, todays wome n tend to marry 5— in life. They have fewer children--- or none at all--- if they prefer to devote themselves to their pro fessi on. The result is a6 in the birthrate.The new role that women have developed for themselves has 1— family life. Children are raised 8_; they spend more time with 9- who are not their parents; babysitters, day-care cen ter personn el, relatives, or n eighbors. Whether they gain or lose in the p rocess is a hotly debated questi on. Exp erts have exp ressed quite differe n1考试科目代码:843B)roma ntic G) adults L) in crease C) un ha ppy D) differe ntly E) raisi ng H) decli ne I) independence J) un iqueiy M) transformed N) adaptedO) unmarriedopinions. However, no matter what they are, one thing about child 10 to be certa in of is that theIon ger the child is with the mother, the better.II . Read the following passages. Answer the questions on each by choosing A, or D, and write theB, C correct ones on your answer sheet 20%Passage One ON SOCIETYLow self-esteem pops up regularly in academic rep orts as an explan ati on for all sorts of viole nee, from hate crimes and street crimes to terrorism. But des pite the popu larity of the explanation, not much evidenee backs it up. In a recent issue of Psychological Review, three researchersexamine this literature at length and conclude that a much stro nger link conn ects high self-esteem to viole nee. "It is difficult to mai ntai n belief in the low self-esteem view aftersee ing that the more viole nt groups are gen erally the ones with higher self-esteem," write Roy Barmeister of Case Western Reserve Un iversity and Laura Smart and Jose ph Bode n of the Un iversity of Virgi nia.The conversational view is that people without self-esteem try to gain it by hurting others. The researchers find that viole nee is much more ofte n the work of people with un realistically highself-esteem attack ing others who challe nge their self-image. Under this umbrella come bullies, ra pists, racists, p sych op aths and members of streetga ngs and orga ni zed crime.The study con cludes: "Certa in forms of high self-esteem seem to in crease on e's pronen ess toviole nee. An un critical en dorseme nt of the cultural value of self-esteem may therefore be couter productive and eve n dangerous .................................... The societal pu rsuit of highself-esteem for every one may literally end up doing con siderable harm."As for prison programs intended to make violent convicts feel better about themselves," perhaps it would be better to try instilling modesty and humility," the researchers write.In an in terview with the Bost on Globe, Baumeister said he believes the "self"-pro mot ing establishme nt is starti ng to crumble. "What would work better for the country is to forget about self-esteem and concen trate on self-co ntrol," he said.In the schools, this would mean turning away from psychic boosterism and emp hasiz ing self-esteemas a by-p roduct of real achieveme nt, not as an end in itself.The self-esteem moveme nt, still entren ched in schools of educatio n, is dee ply imp licated in the dumb ing dow n of our schools, and in the sp urious equality beh ind the idea that it is a terriblep sychic blow if one stude nt does any better or any worse tha n ano ther. Let's hope it is in deed crumbli ng.1. The researcher finds that there are stron ger connections betwee nA.low self-esteem and viole nee.B.low self-c on trol and viole nee.C.high self-image and viole nee.D.high self-c on trol and viole nee.2.The researchers would most p robably agree with the followi ng EXCE PTA.self-esteem should be pro moted and en couraged.B.schools should cha nge their concept of self-esteem.C.the traditi onal view is beg inning to lose ground.D.prisons should cha nge their p rese nt p ractice.Passage TwoBut if Ian guage habits do not rep rese nt classes, a social stratificati on into someth ing a byg one as "aristocracy" and "com mon s", they do still of course serve to ide ntify social groups. This is somethi ng that seems fun dame ntal in the use of Ian guage. As we are i relati on to p olitical and n ati onal moveme nts, la nguage is used as a badge or a barrier depending on which way we look at it. The new boy at school feels out of it at first because he does not know the right words for thin gs, and awe-i nspiring pun dits of six or seve n look dow n on him for not being aware that racksy means "dila pi dated", or hairy "out first ball". The miner takes a certa in p ride in being "one up" on the visitor or no vice who calls the cage a "lift" or who thinks that men worki ng in a warm seam are in their " underpan ts" whe n anyone ought to know that the garme nts are called hoggers. The "in sider" is seldom dis pl eased that his Ian guage dist in guishes him from the "outsider".Quite apart from sp ecialized terms of this kind in groups, trades and pro fessi ons, there are all kinds of sta ndards of correct ness at which most of us feel more or less obliged to aim, because we know that certain kinds of English invite irritation or downright condemn ati on. On the other hand, we know that other kinds con vey some kind of p restige and bear a welcome cachet.In relation to the social aspects of Ianguage, it may well be suggestedthat English sp eakers fall into three categories: the assured, the an xious and the in differe nt. At one end of this scale, we have the people who have "position" and "status", and who therefore do not feel they n eed worry much about their use of En glish. Their educati on and occ up atio n make them con fide nt of sp eak ing an unimp eachable form of En glish: no fear of being criticized or corrected is likely to cross their min ds, and this gives their sp eech that characteristically un selfc on scious and easy flow which is ofte n env ied.At the other end of the scale, we have an equally imp erturbable band, sp eak ing with a similar degree of careless ease, becauseeven if they are aware that their English is condemned by others, they are sup remely in differe nt to the fact. The Mrs. Mops of this world have active and efficie nt ton gues in their heads, and if we happened not to like their ways of saying things, well, we "can lump it". That is their attitude. Curiously eno ugh, writers are in cli ned to rep rese nt the sp eech of both these extreme p arties with -in' for ing. On the one han d, "We're goin' huntin', my dear sir';" on the other, "We're goin' raci n', mate."In betwee n, accord ing to this view we have a far less fortun ate group, the an xious. These actively try to surp ass what they believe to be bad En glish and assiduously cultivate what they hope to be good En glish. They live their lives in some degree of nervousness over their grammar, their pronunciation, and their choice of words: sensitive, and fearful of betraying themselves. Keeping up with the Joneses is measured not only in houses, furniture, refrigerators, cars, and clothes, but also in sp eech.And the misfort une of the "an xious" does not end with their inner an xiety. Their lot is also the open or veiled contempt of the "assured" on one side of them and of the "in differe nt" on the other.It is all too easy to raise an unworthy laugh at the anxious. The people thus uncomfortably stilted on linguistic highheels so often form part of what is, in many ways, the most admirable sect ion of any society: the ambitious, ten se, inn er-drive n peop le, who are bent on "go ing p laces and doing thin gs". The greater the p ity, the n, if dis prop orti on ate amount of their en ergy goes into what Mr. Shar pless called "this shabby obsessi on" with varia nt forms of En glish -- esp ecially if the net result is (as so ofte n) merely to sound affected and ridiculous. "Here", accord ing to Bac on, "is the first distemper of learning, when men study words and not matter...lt seems to me thatP ygmalio n's frenzy is a good emblem... of this van ity: for words are but the images of matter; and exce pt they have life of reas on and inven ti on, to fall in love with them is to fall in love with a picture."3.The attitude held by the assured towards Ian guage isA.criticalB.an xiousC.self con sciousD.non chala nt 4. The an xious are con sidered a less fortun ate group becauseA.they feel they are socially looked dow n uponB.they suffer from in ternal an xiety and exter nal attackC.they are in here ntly n ervous and an xious peopleD.they are un able to meet sta ndards of correct ness5.The author thi nks that the efforts made by the an xious to cultivate what they believe is good En glish areA.worthwhileB.meanin glessC.p raiseworthyD.irratio nalPassage ThreeDesp ite Denm ark's manifest virtues, Danes n ever talk about how p roud they are to be Danes.This would sound weird in Danish. When Danes talk to foreigners about Denm ark, they always beg in by comme nting on its tinin ess, its unimp orta nee, the difficulty of its Ianguage, the general small-mindedness and self indulgenee of their coun tryme n and the high taxes. No Dane would look you in the eye and say "De nmark is a great coun try". You are supp osed to figure this out for yourself.It is the land of the silk safety n et, where almost half the n atio nal budget goes toward smooth ing out life's in equalities, and there is p le nty of money for schools, day care, retrai ning p rograms, job sem inars -- Danes love sem inar: three days at a study center hearing about waste management is almost as good as a ski trip. It is a culture bombarded by English, in advertising, pop music, the Internet, and despite all theEn glish that Danish absorbs -- there is no Danish Academy to defe nd aga inst it -- old dialects p ersist in Jutla nd that can barely be un derstood by Copen hage ners」t is the land where, as the say ing goes, "Few have too much and fewer have too little", and a foreigner is struck by the sweet egalitarianism that prevails, where the lowliest clerk gives you a level gaze, where Sir and Madame have disa pp eared from com mon usage, eve n Mr. and Mrs. It's a n ati on of recyclers -- about 55% of Danish garbage gets made into something new -- and no nuclear power plants. It's a nation of tireless planners. Trai ns run on time. Thi ngs op erate well in gen eral.Such a n ati on of overachievers -- a brochure from the Mi nistry of Busin ess and In dustry says, "De nmark is one of the world's clea nest and most orga ni zed coun tries, with virtually no pollution, crime, or poverty. Denmark is the most corruption-free society in the Norther n Hemis phere." So, of course, on e's heart lifts at any sight ing of Danish sleaze: skin head graffiti on buildi ngs ("Foreig ners Out of Denm ark!"), broke n beer bottles in the gutters, drunken tee nagers slu mped in the p ark.Non etheless, it is an orderly land. You drive through a Dan ish tow n, it comes to an end at a stone wall, and on the other side is a field of barley, a nice clea n line: tow n here, country there. It is not a n ati on of jaywalkers. People sta nd on the curb and wait for the red light to cha nge, eve n if it's 2 a.m. and there's not a car in sight. However, Danes don't think of themselves as a waiting-at-2-a.m.-for-the-green-light-people -- that is how they see Swedes and Germa ns. Danes see themselves as jazzy people, impro visers, more free sp irited tha n Swedes, but the truth is (though one should not say it) that Danes are very much like Germa ns and Swedes. Orderli ness is a main sell ing point. Denmark has few n atural resources, limited manu facturi ng cap ability; its future in Europe will be as a broker, ban ker, and distributor of goods. You send your goods by container ship to Copenhagen, and these bright, young, English-speaking, utterly hon est, highly disci pli ned people will get your goods around to Scandin avia, the Baltic States, and Russia. Air ports, sea port, highways, and rail lines are ultramoder n and well-mai ntai ned.The orderl in ess of the society does n't mea n that Dan ish lives are less messy or Ion ely than yours or mine, and no Dane would tell you so. You can hear plenty about bitter family feuds and the sorrows of alcoholism and about p erfectly sen sible people who went off one day and killed themselves. An orderly society can not exe mpt its members from the hazards of life.But there is a sense of en titleme nt and security that Danes grow up with. Certa in thi ngs are yours by virtue of citize nship, and you should n't feel bad for tak ing what you have en titled to, you are as good as anyone else. The rules of the welfare system are clear to every one, the benefits you get if you lose your job, the ste ps you take to get a new one; and the orderl in ess of the system makes it po ssible for the country to weather high unemployment and social un rest without a sense of crisis.6.The author thi nks Danes adopt a __________ attitude towards their country.A.boastfulB.modestC.dep recat ingD.mysterious 7. Which of the followi ng is Not a Dan ish characteristic cited in the p assage?A.Fondn ess of foreig n culture.B.Equality in society.C.Lin guistic tolera nee.D.P ersiste nt planning.8.The author's reacti on to the stateme nt by the Mini stry of Bus in ess and In dustry isA.disa pprovingB.approvingC.non committalD.doubtful9.Accord ing to the p assage, Danish orderli ness __________ .A.sets the people apart from Germa ns and SwedesB.spare Danes social troubles besett ing other peop lesC.is con sidered econo mically esse ntial to the countryD.p reve nts Danes from ack no wledg ing exist ing troubles10.At the end of the p assage the author states all the followi ng Exce pt thatA.Danes are clearly in formed of their social ben efitsB.Danes take for gran ted what is give n to themC.the open system helps to tide the country overD.orderl in ess has alleviated unemploymentIII. Reading and writing: 35%Read the following passage and choose the best answer from the questiOMS% ). Write a summary of the Passage within 100 word(25% ). Write your answers on your answer sheet.The bizarre an tics of slee pwalkers have pu zzled p olice, perpi exed scie ntists, and fascinated writers for centuries. There is an endless supply of stories about sleepwalkers. Person have been said to climb on steep roofs, solve mathematical p roblems, compose music, walk though p late glass win dows, and commit murder in their slee p.How many of these stories have a basic in fact, and how many are pure fakery? No or kno ws, but if some of the most sen satio nal stories should be take n with a barrel of salt others are a matter of record.In Revere, Massachusetts, a hun dred p oliceme n combed a waterfr ont n eighborhood for a lost boy who left his home in his slee p and woke up five hours later on a stra nge sofa in a stra nge livi ng room, with no idea how he had gone there.There is an early medical record of a somnambulist who wrote a novel in his sleep. And the great French writer Voltaire knew a sleepwalker who once got our of bed, dressedhimself, made a po lite bow, dan ced a minu et, and the n un dresseda nd went back to bed.At the uni versity of Iowa, a stude nt was rep orted to have the habit of gett ing up in the middle of the ni ght and waiki ng three-quarters of a mile to the Iowa River. He would take a swim and the n go back to his room to bed.The world's champion sleepwalker was supposed to have been an Indian, Pandit Ramrakha, who walked sixtee n miles along a dan gerous road without realizi ng that he had left his bed. Second in line for the title is p robably either a Vienna housewife or a British farmer. The woman did all her shopping on busy streets in her sleep. The farmer, in his slee p, visited a veteri naria n miles away.The lead ing expert on slee p in America claims that he had n ever see n a slee pwalker. is Dr. Nathaniel Kleitman, a physiologist at the University of Chicago. He is said to know more about slee p tha n any other liv ing man, and duri ng the last thirty-five years had lost a lot of slee p watchi ng people slee p. Says he, "Of course, I know that there a^ sleepwalkers because I have read about them in the newspapers. But none of my sleepwalkers ever walked, and if I were to advertise for sleepwalkers for an exp erime nt, I doubt that rd get many takers."Slee pwalk ing, n evertheless, is a scie ntific reality. Like hypno sis, it is one of thosedramatic, eerie, awe --inspiring phenomena that sometimes border on the fan tastic. It lends itself to con troversy and misc oncep ti ons. What is certa in about slee pwalk ing is that it is a symptom of emotional disturbanee, and that the only way to cure it is to remove the worries and an xieties that cause it. Doctors say that somn ambulism is much more com mon tha n is gen erally supp osed. Some have estimated that there are four million somnambulists in the United States. Others set the figure even higher. Many slee pwalkers do not seek help and so are n ever put on record, which means that an accurate count can n ever be made.The simpi est explan ati on of slee pwalk ing is that it is the act ing out of vivid dream. The dream usually comes from guilt, worry, n ervous ness, or some other emoti onal con flict. Theclassic slee pwalker is Shakes peare's Lady MacBeth. Her ni ghtly wan deri ngs were caused by her guilty con scie nee at hav ing committed murder. Shakes peare said of he ■ "The eyes are open but their sense is shut."The age-old questi on is: Is the slee pwalker actually awake or aslee p? Scie ntists have decided that he is about half-a nd-half. Like Lady MacBeth, he had weighty p roblems on his mind. Dr. Zelda Tep litz, who made a ten-year study of the subject, say, "Some people stay awake all ni ght worry ing about their p roblems. The slee pwalker thrashes them out in his slee p. He is awake in the muscular area, p artially aslee p in the sen sory area." In other words, a person can walk in his slee p, move around, and do other thi ng but he does not thi nk about what he is doing.Hes,There are many myths about slee pwalkers. One of the most com mon is the idea that it's dan gerous or eve n fatal to wake n a slee pwalker abrup tly. Exp erts say that the shock suffered by a slee pwalker sudde niy awake ned is no greater tha n that suffered in wakir up to the noise of an alarm clock. Another mistaken belief is that sleepwalkers are immune to injury. Actually most slee pwalkers trip over rugs or bump their heads on doors at some time or other.What are the cha nces of a slee pwalker committi ng a murder or doing somethi ng else extraord inary in his slee p? Some cases of this have bee n rep orted, but they very rarel happen. Of course the few cases that are rep orted receive a great deal of p ublicity. Dr Tep litz says, "Most people have such great in hibiti ons aga inst murder or viole nee that they would awake n -- if some one did n't wake n them." In gen eral, authorities on slee pwalk ing agree with her. They thi nk that peoplewill not do anything in their slee p that is aga inst their own moral code. As for the p ublicized cases, Dr. Tep litz points out "Slee pwalk ing itself is dramatic...slee pwalkers can always find an audie nee. I think tha some of their tall tales get exaggerated in the telli ng." I n her own file of case histories, there is not one slee pwalker who ever got bey ond his own front door.Parents often explain their children's -- or their own -- nocturnal oddities as sleepwalking. Sleepwalking is used as an excuse for all kinds of irrational behavior. There is a case on record of a woman who dreamed that her house was on fire and flung her baby out of the win dow. Dr. Tep litz believes that this in sta nee of irrati onal behavior was not due to somnambulism. She believes the woman was seriously dera nged or insane, not a slee pwalker.For their own p rotect ion, chronic slee pwalkers have bee n known to tie themselves in bed, lock their doors, hide the keys, bolt the win dows, and rip up all sorts of gadgets o wake themselves if they should get out of bed. Curiously eno ugh, they have an uncanny way of avoidi ng their own traps whe n they slee pwalk, so none of their tricks seem to work very well. Some slee pwalkers talk in their slee p loudly eno ugh to wake some one else in the family who can the n shake them back to their sen ses.Children who walk in their sleep usually outgrow the habit. In many adults, too, the condition is more or less temporary. If it happens often, however, the sleepwalker should seek help. Although slee pwalk ing itself is nothing to become alarmed about, the p roblems that cause the slee pwalk ing may be very serious.A.the mult iple choices :choose the best answer 10%1. What does the phrase "taken with a barrel of salt" mean at end of the second p aragra ph?A.incon ceivableB.un believableC.sus pectedD.im plausible2.Who was suppo sed to be the world's cha mpion slee pwalker?A.The man walked sixtee n miles along a dan gerous road.B.The boy walked five hours in his slee p.C.The stude nt habitually walked to the Iowa River and swam in his slee p.D.The man dan ced a minute in his slee p.3.What is true of slee pwalk ing accord ing to the p assage?A.It is caused by emoti onal con flict or guilty con scie nee.B.It is the act ing out of a vivid dream.C.Somn ambulists are aslee p duri ng their slee pwalk ing.D.It is dan gerous to wake n a slee pwalker.4.Dr. Zelda Tep litz ______A.studied slee pwalk ing for at least ten years.B.con cluded that slee pwalkers are p artially aslee p in their sen sory area.C.main tai ned that it is a mistake n belief that slee pwalkers are immune to injury.D.both A and B.5. The writer makes it obvious that __________ .A.slee pwalkers are ofte n awake ned by dan gersB.the un derly ing cause of slee pwalk ing is more serious tha n slee pwalk ing itselfC.most slee pwalkers are dera nged or insaneD.All of the above.B. Summary writing: 25%They had been sentto Germany at theage of fifteen, for music among other thin gs. And they had had a good time there.They lived freely among the students, they argued with the men over p hilos op hical,sociological and artistic matters, they were just as good as the men themselves: onlybetter, since they were wome n.And they tramped off to the forests with sturdy youths bearing guitars, twan g-twa ng!They sang the Wan dervogel son gs, and they were free.It was the talk that mattered sup remely: the imp assi oned in tercha nge of talk.B. Put the following parts into Chinese:25%来美国求学的中国学生与其他亚裔学生一样,大多非常刻苦勤奋,周末也往 往会抽出一天甚至两天的时间去实验室加班,因而比起美国学生来,成果出得较 多。

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