问题 完形填空
完形填空
                                                                     All the world asks
      On my first day in a college classroom,I  felt like an overgrown child returning to civilization
(文明世界) after having been lost in the forest for thirty years.There I sat,__1__enough to be
a father to most of the students in the room,__2__unconfident enough to be their baby brother.
We were crowded elbow (肘部) to elbow,listening to a__3__
      who looked even younger than the students.I felt uncomfortable and out of place as the
professor carefully__4__what she expected us to learn.As I listened,I couldn't help but__5__of
my own oldest daughter who was now beginning her first year in__6__,just like me.I remembered
how hard I had tried to help build self-confidence in her and my other children.So why did I
suddenly feel like a scared__7__myself?When I walked out of that classroom,I had serious
__8__about my ability to make it__9__college.
      Not until late that night did my thinking__10__.It was a long-distance__11__from my
daughter,my fellow college freshman (新生),that did the trick.She spoke on the phone about
the doubts,worries and anxieties she was__12__.She was certain that she'd never__13__at
college.How__14__her worries sounded.In my most confident parental__15__,I said,"Doing
your best is all the world__16__".The next day in class,those words still repeated in my head.
When the professor raised a__17__for the class,nobody,including me,__18__to answer.When
I looked around at the__19__and uncertainty on the young faces in that room,I knew__20__what
I had to do:my best.That's all the world asks.So raised my hand,and the professor called my name.
I spoke.
( )1.A.big      
( )2.A.and        
( )3.A.professor  
( )4.A.showed    
( )5.A.think      
( )6.A.school    
( )7.A.father    
( )8.A.fears      
( )9.A.over      
( )10.A.stop      
( )11.A.call      
( )12.A.obtaining
( )13.A.fail      
( )14.A.common    
( )15.A.sound    
( )16.A.hopes    
( )17.A.request  
( )18.A.dared    
( )19.A.sorrow    
( )20.A.exactly  
B.tall    
B.so      
B.teacher  
B.explained
B.speak    
B.office  
B.parent  
B.doubts  
B.on      
B.turn    
B.talk    
B.gaining  
B.succeed  
B.ordinary
B.whisper  
B.asks    
B.problem  
B.preferred
B.joy      
B.roughly 
C.old        
C.or          
C.lecturer    
C.designed    
C.talk        
C.classroom  
C.child      
C.opinions    
C.with        
C.change      
C.report      
C.experiencing
C.win        
C.regular    
C.word        
C.wants      
C.question    
C.tried      
C.fear        
C.gradually  
D.strong    
D.yet        
D.instructor
D.offered    
D.hear      
D.college    
D.son        
D.ideas      
D.through    
D.continue  
D.discussion
D.feeling    
D.pass      
D.familiar  
D.voice      
D.expects    
D.demand    
D.prepared  
D.anger      
D.certainly 
答案

1-5CDABA  6-10DCBDC  11-15ACBDD    16-20BCACA

单项选择题

由我国科学家精确绘制的水稻第四号染色体精确测序图发表在代表国际权威的英国《自然》杂志上。科技部、中国科学院在上海宣布,我国科学家独立完成了“国际水稻基因组计划”第四号染色体精确测序任务,对这一国际计划的贡献率达10%,这是我国迄今为止完成的最大基因组单条染色体的精确测序。 

刊于《自然》杂志的论文《水稻基因组第四号染色体序列及分析》宣布,中国科学家采用克隆步移法完成了对水稻粳稻基因组第四号染色休全长序列的精确测定;拼接后总长为3500万碱基对,精确度为99.99%,覆盖了染色体全长序列98%的区域,达到国际公认的基因组测序图的标准。 

科学家们在完成序列精确测定的同时,还做了大量的研究工作:对水稻第四号染色体所含基因进行预测分析,鉴定出4658个基因,为进一步鉴定这些基因的功能奠定了基础;完整地测定了水稻四号染色体的着丝粒序列,这是迄今首次完成的高等生物染色体着丝粒序列,为研究着丝粒的功能、染色体的稳定性和染色休的复制提供了基础,也为开发可转化的“人工水稻或植物染色体”提供了基础。以蓝天、白云、金色水稻为封面的本期《自然》杂志,同时也刊登厂日本科学家对水稻第——号染色体的精确测序。 

测序专家工作组组长、中科院国家基因研究中心的韩斌博士告诉记者,第四号染色体的测序工作于2001年4月启动,首先完成精细物理图,然后采用克隆步移法大规模测序,绘制基因组完成图。此外,研究人员还对另一个亚种籼稻品种广陆矮第四号染色体的序列也进行了测定,报道了水稻两个主要栽培稻间在基因组成、顺序及DNA序列水平上的——些异同,揭示两者之间一些亲缘和进化关系,这些数据为将来整个基因水平的比较提供了良好的示范。 

韩斌博士还表示,目前世界上有一半以上的人口以水稻为主食。水稻基因组第四号染色体的序列分析结果和今后的功能基因组研究,可获得大量的水稻遗传信息和功能基因,为培育优良性状的水稻新品种打下良好的基础。同时此次测序成果,还将有助于了解小麦、玉米等其他重要粮食作物的遗传秘密,从而推动整个农作物基因组的研究。

对《水稻基因组第四号染色体序列及分析》一文所宣布的内容信息,表述有误的一项是()。

A.对水稻基因组第四号染色体全长序列的精确测定,经拼接后其总长为3500万碱基对,精确度为99.99%

B.水稻基因组第四号染色体全长序列的精确测定,覆盖厂水稻染色体全长序列的98%

C.中国科学家完成的对水稻基因组第四号染色体全长序列的精确测定图,达到了同际公认的基因组测序图的标准

D.刘水稻基因组第四号染色体全长序列的精确测定是采用克隆步移法完成的

单项选择题 B1型题