pletely dependent on the image I create in the eyes of others.
There are those who __ 14 __ that since I can’t see, I obviously also cannot __ 15 __. Very often people will talk with me at the top of their lungs. Conversely to this, people will also often __16__, assuming that since my eyes don’t work, my ears don’t either. For example, when I go to the airport and ask the ticket a gent for __17__ to the plane, he or she will always pick up the phone and call a ground hostess in a very low voice. "Hi, Jane, we’ve got a 76 here." I have concluded that the word “__18 __”is not used because they are unwilling to inform me of my condition of which I may not have been previously __19__.
On the other hand, others know that of course I can hear, but believe that I can’t talk. Once I became ill and was hospitalized. Immediately after I was __20__ , I was wheeled down to the X-ray room. Just at the door sat an elderly woman ( judging from her voice ) asked the orderly(护工) who had been wheeling me:" What is your name?" “What’s your name?” the orderly __ 21__ to me. "Harold Krents", I replied. "Harold Krents", he repeated. "When was he born?" "When were you born?" This continued for about five minutes before I finally interrupted, "Look, this is absolutely __22_. OK, I can’t see, but it’s go to become pretty
__ 23 to both of you that I don’t need an interpreter." “He says he doesn’t need an interpreter," the orderly reported to the woman.
The __ 24__ misconception of all is the view that because I cant see, I can’t __25 __ . I was turned down by over forty law firms, __ 26__ my qualifications included a cum laude (以优等成绩毕业者 )degree from Harvard Law School. The __ 27 __ to find jobs, the continuous __ 28__ of being told that it was impossible for a blind person to __29 __ law, the rejection letter, not based on my lack of __30__ but rather on my disability, will always remain one of the most upsetting experiences of my life.
__ 31__ , the Department of Labor issued laws that demand equal __ 32 __ opportunities for the disabled. The business community’s response has been __33__. The attitude towards the disabled is beginning to change.
14．A．assumeB．observeC．approveD．propose
15．A．hearB．talkC．feelD．care
16．A．shoutB．laughC．whisperD．cry
17．A．welcomeB．permissionC．adviceD．assistance
18．A．passengerB．blindC．troubleD．situation
19．A．afraidB． awareC．curiousD．desperate
20．A．invitedB．releasedC．includedD．admitted
21．A．askedB．respondedC．repeatedD．exchanged
22．A．cheerfulB．ridiculousC．charmingD．disgusting
23．A．clearB．easyC．confusingD．doubtful
24．A．earliestB．slightestC．latestD．toughest
25．A．thinkB．studyC．workD．understand
26．A．as ifB．even thoughC．now thatD．in case
27．A．attemptB．opportunityC．mistakeD．success
28．A．disappointmentB．reliefC．envyD．effort
29．A．disobeyB．challengeC．practiceD．make
30．A．confidenceB．luckC．abilityD．ambition
31．A．RegretfullyB．DeliberatelyC．ExactlyD．Fortunately
32．A．medicationB．employmentC．learningD．traveling
33．A．enthusiasticB．passiveC．negativeD．uncertain
二．根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。（每题2分 共10分）
As a parent, you must have a lot of concerns regarding the various skills you would like your child to acquire. Music is one of them. __ 34 __ On the other hand, it is great for a child’s overall development if he or she has an interest in the fine arts.
__ 35 __ It is well known that they stay out of trouble as teenagers and young adults if they have music as a serious interest. The concentration helps them with their grades. Their learning and communication skills are better than those of their peer group. They also develop lots of confidence and self-esteem.
Another advantage of your child learning music becomes apparent only at a later stage.
__ 36 __ It can be very beneficial and many top musicians had a very early exposure to music and credit this with their later successes.
You can start when your child is only a baby, by exposing him or her to a wide range of music at home. __37 __ And you could sustain ( 维持 ) your child’s interest by having the both of you singing together.
Some parents start their children on a musical instrument as early as 3 years of age. This is great if the child is having a good time. It goes without saying that you should not have to drag your child’s to lessons. You can be assured that nothing productive will come out of it. _38 __.
If you start your child on music lesson by the age of 5, taking care to encourage her and not to push her, your child will be grow up into an accomplished adult with a well rounded personality.
A.It can have good effects on your child.
B.This is the selection of music as a career.
C.And your child will have a lifelong dislike of music.
D.Otherwise you’ll completely spoil your child’s future.
E.You could ensure that there is a song or melody playing in the background.
F.The advantages of teaching children to play a musical instrument are many.
G.On the one hand, you can encourage your child’s creativity and natural hobby.
四、物理
39．（20分）电子扩束装置由电子加速器、偏转电场和偏转磁场组成．偏转电场由加了电压的相距为d的两块水平平行放置的导体板形成，匀强磁场的左边界与偏转电场的右边界相距为s，如图甲所示．大量电子（其重力不计）由静止开始，经加速电场加速后，连续不断地沿平行板的方向从两板正中间射入偏转电场．当两板不带电时，这些电子通过两板之间的时间为2t0，当在两板间加如图乙所示的周期为2t0、幅值恒为U0的电压时，所有电子均从两板间通过，进入水平宽度为l，竖直宽度足够大的匀强磁场中，最后通过匀强磁场打在竖直放置的荧光屏上．问：
（1）电子在刚穿出两板之间时的最大侧向位移与最小侧向位移之比为多少？
（2）要使侧向位移最大的电子能垂直打在荧光屏上，匀强磁场的磁感应强度为多少？
（3）在满足第（2）问的情况下（电子的质量为m、电荷量为e），打在荧光屏上的电子束的宽度为多少？
40. （20分）如图所示，将边长为a、质量为m、电阻为R的正方形导线框竖直向上抛出，穿过宽度为b、磁感应强度为B的匀强磁场，磁场的方向垂直纸面向里， 线框向上离开磁场时的速度刚好是进入磁场时速度的一半，线框离开磁场后继续上升一段高度，然后落下并匀速进入磁场，整个运动过程中始终存在着大小恒定的空气阻力f，且线框不发生转动．求：
（1）线框在下落阶段匀速进入磁场时的速度v2；
（2）线框在上升阶段刚离开磁场时的速度v 1；
（3）线框在上升阶段通过磁场过程中产生的焦耳热Q．
五、化学
41．工业上有一种用C02来生产甲醇燃料的方法：
将6 mol CO2和8 mol H2充入2 L的密闭容器中，测得H2的物质的量随时间变化如下图所示(实线)。图中数据a(1，6)表示：在1 min时H2的物质 的量是6 mol。
（1）a点正反应速率 (填“大于”“等于”或“小于”)逆反应速率。其化学平衡常数K=
(2)仅改变某一实验条件再进行两次实验测得H2的物质的量随时间变化如图中虚线所示。曲线I对应的实验条件改变是 ，曲线Ⅱ对应的实验条件改变是 .
42. 若按上图所示连接对铅蓄电池进行充电。B电极上的电极反应式为 ；充电完毕。铅蓄电池的正极是 极(填“A”或“B”)。
43. 中学阶段硫酸是强酸，将硫酸在水溶液中看作完全电离。但事实是，硫酸在水中的第一步电离是完全的，第二步电离并不完全，其电离情况为：H2SO4＝H++HSO4―，HSO4― H++SO42―。请回答下列有关问题：
(1)NaHSO4溶液与NaHCO3溶液反应的离子方程式为__________________________。
(2)若25℃时，0.10 mol•L―1的NaHSO4溶液中c(SO42―)=0.029 mol•L―1，则HSO4―的电离常数Ka= (保留两位有效数字)；0.10 mol•L―1的H2SO4溶液中c(H+)_____0.129mol•L―1
(填“>”、“=”或“<”)。
44. 已知常温下，Cu(OH)2、Mg(OH)2溶度积常数分别为Ksp[Cu(OH)2]＝2×10－20；Ksp[Mg(OH)2]＝3.2×10－11。Mg的相对原子质量为 24。
（1）常温下，假设饱和Mg(OH)2溶液的密度为1 g•mL－1，试求在该温度下100g水中溶解Mg(OH)2的最大质量为________g。
（2）常温下，向浓度均为0.02 mol•L－1的MgCl2和CuCl2混合 溶液中逐滴加入NaOH溶液，当两种沉淀共存时， cMg2＋cCu2＋＝_________。
45.25℃用0.1000mol/L的N aOH(aq)滴定20.00mL浓度为0.1000mol/L的HCl(aq)，
（1）①下列滴定曲线的图像正确的是______（下图括号内是曲线上某一点的坐标）
（2）下表哪些指示剂可作为实验0.1000mol/L的NaOH(aq)滴定20.00mL浓度为0.1000mol/L的HCl(aq)的指示剂
指示剂变色PH范围颜色变化
百里酚蓝1.3―2.8红―黄
石蕊5.0―8.0红―蓝
甲基红4.4―6.2红―黄
酚酞8.0―9.6无色―紫红
甲基橙3.1―4.4红―黄
若用0.1000mol/L的NaOH(aq)滴定20.00mL浓度为0.1000mol/L的一元弱酸HB(aq)最好使
用 作指示剂
（3）若用0.1000mol/L的NaOH(aq)滴定20.00mL某浓度HCl(aq)，根据下列实验数据，计算c(HCl)=
实验序号标准溶液NaOH(aq)体积
滴定前刻度/mL滴定后刻度/mL
11.0221.06
22.1222.15
30.2523.30
40.2020.19
六、生物
46．（15分）血液是人和动物体内的一种重要组织，它具有多方面的重要作用。请据图回答：
（1）_______是内环境的重要组成部分，血浆渗透压的大小主要与_______、_________的含量有关。人体在剧烈运动后产生的大量_______进入血浆后，通过机体调节仍能维持PH值相对稳定，主要是依靠物质____________的调节 作用。
（2）血液具有防御功能。图中［ ］___________细胞在增殖分化后能合成、分泌出抗体；能导致结核杆菌的宿主细胞裂解死亡的细胞来源于图中的［ ］___________。
（3）白血病是由于环境中的致癌因子损伤了细胞中的DNA分子，使___________基因发生突变而引起。某白血病患者通过骨髓移植得以治愈，因骨髓中的___________在诱导分化因子作用下，能增殖分化成红细胞、白细胞和血小板，恢复了正常的造血功能。
（4）实验室内有一群基因突变的老鼠，这些老鼠只要按时喂食并且不让它们运动，它们就能维持正常；当它们进食后，它们的血糖浓度会轻微上升，然后下降至一个恒定状态，然而只要让老鼠运动或禁食一餐，它们的血糖浓度就会迅速下降，进而昏迷。依据我们所学过的血糖稳态调节方式可知，这些突变老鼠所面临的状况很可能是体内细 胞缺乏_________激素。
（5）某人剧烈运动一段时间后，体内产热量增加，汗腺分泌增强，这时___________中的体温调节中枢兴奋，同时血浆渗透压_______，导致____________激素分泌增加。
47．（15分）回答下列有关生长素的问题：
（1）植物顶端优势时顶芽产生的生长素运到相邻侧芽________（需要、不需要）消耗ATP。_________(是否)体现两重性,体现两重性的还有____ _____.
（2）某研究小组探究避光条件下生长素浓度对燕麦胚芽鞘生长的影响。胚芽鞘去顶静置一段时间后，将含有不同浓度生长素的琼脂块分别放置在不同的去顶胚芽鞘一侧，一段时间后测量并记录弯曲角度（α）。右图为其实验示意图。
①α的范围为________________（180°≥α>0°、180°≥α≥90°、90°≥α> 0°）。(2分)
②若想在细胞水平上证明生长素对胚芽鞘生长的影响，可以取弯曲处作_________（横切、纵切）片制成装片，用显微镜观察并测量两侧细胞平均长度，作出比较。
（3）右图是水平放置的植物的根、茎对生长素作用的反应曲线，图示字母中表示根近地侧的是__________，茎远地侧的是__________。
（4）有科学家认为根的向地生长不仅与生长素有关，还与乙烯的作用有关。为了研究二者的关系，做了这样的实验：将某种开花植物的根尖放在含不同浓度的生长素的培养液中，并加入少量蔗糖做能源。发现在这些培养液中出现了乙烯，且生长素浓度越高，培养液中乙烯的浓度也越高，根尖生长所受的抑制也越强。
①此人所作实验的自变量是____________，因变量是____________。
②为使实验严谨，还需要另将一些等量的根尖放在________________，作为_________组。
③据此实验结果，可推知水平放置的植物根向重力生长的原因是高浓度的___________诱导产生了_______________，从而__________近地侧根的生长。