问题 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今天发表在国际权威的英国《自然》杂志上。今天上午,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到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体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,并注释在染色体的准确位置上,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4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体的复制提供了结构基础,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,同时也刊登了日本科学家对水稻第一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种在基因组成、顺序及DNA序列水平上的一些异同,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。

不包含在“大量的研究工作”中的一项是()。

A.对水稻第四号染色体所含基因进行预测分析,鉴定出了4658个基因

B.将鉴定出的这4658个基因注释在染色体的准确位置上

C.完整地测定了水稻4号染色体的着丝粒序列

D.开发了可转化的“人工水稻或植物染色体”

答案

参考答案:D

解析:

根据原文“也为开发可转化的‘人工水稻或植物染色体’提供了基础”一句可知,尚未开发出来,那么显然不是已做的工作,不包含在“大量的工作”中。

阅读理解

阅读理解。

     When you come to Auckland as a foreigner, you'll easily find a traditional pub (酒吧) either in small

towns or in big cities. In these pubs many different kinds of drinks such as wine, beer, coke, coffee, and

juice are served. You can find out the local culture. However, if you don′ t know the pub culture, you may

feel embarrassed or even get into trouble.

      Most pubs in Auckland have no waiters, so you have to go to the bar to get your own drinks. Those

who don't know this may wait a very long time before they realize they would have to fetch their own

drinks. While you are standing in front of the bar waiting for service, you are able to chat with others who

are also waiting for service. The bar counter (柜台) is possibly the only place you can find in Auckland to

talk friendly with strangers. But while you are chatting with others or talking about what you want to order,

you mustn't block all the entrance to the bar.

     Remember, you'll never go into the pubs unless you are over 18.

1. A traditional pub in Auckland is very ______. [ ]

A. friendly

B. embarrassed

C. relaxing

D. Both A and B

2. When you are in pub, ______. [ ]

A. you will have a better service with a lot of waiters around

B. you will have to order and fetch your own drinks all by yourself

C. it is easy for you to make friends with others by chatting or talking

D. You'll have to take time to wait for your drink 

3. Which sentence is true?  [ ]

A. It is very hard for you to find a traditional pub to relax yourself in Auckland

B. You aren't allowed to get into the pubs until you are over18

C.You are able to order any of the drinks or foods in the pubs

D. You can chat or talk with friends in any places in the pub

4. Which topic is the best for this passage?  [ ]

A. Service in Auckland's Pubs.

B. Pub Culture in Auckland

C. Making Friends in Pubs.

D. How to Order Drinks in Pubs.

5. Most pubs in Auckland have______. [ ]

A. many waiters

B. a waiter

C. no more than 10 waiters

D. no waiters

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