问题 阅读理解

阅读理解。

    Many Chinese students who have learnt English for more than ten years are still unable to speak English

very well when they meet a foreigner. They seem to have mastered the basic language structure (结构), but

a conversation in English will make them feel uneasy. They are afraid that other people might find out their

mistakes.

    It's uncommon that many students who are bad speakers of English can write English perfectly. This

proves that they are unable to organize their idea in English. The center of the problem is that they lack

practice and confidence (自信).

    Why should you be afraid? Do you fear those foreigners with whom you are speaking? Don't be shy, they

will not laugh at you just for a little mistake you make. The best way to get rid of trouble is to learn to speak

by speaking more. I am sure that constant practice will help you succeed.

1. What's the best topic for the passage? [ ]

A. How to Speak to Foreigners

B. How to Study English Well

C. How to Organize the Idea in English

D. Practice Speaking English All the Time

2. Many Chinese students can write English very well, but they cannot speak English fluently because _____. [ ]

A. they seldom meet foreigners

B. they seldom practice speaking English

C. they had no chance to speak English

D. they think it's enough to master the basic language structure only

3. So many Chinese students are afraid to speak to foreigners because _____. [ ]

A. they are afraid they can't understand foreigners

B. they don't think their English is poor

C. they worry about making mistakes in their speaking

D. they didn't like speaking to foreigners

4. According to the passage, which of the following is NOT true? [ ]

A. We can speak English fluently by doing more speaking.

B. If you can write English perfectly, you are able to organize your idea in English.

C. If you can write good English composition, you can speak English very well.

D. Any Chinese students can't speak English fluently because they are afraid of making mistakes.

5. In the last paragraph, the expression "get rid of" means _____. [ ]

A. throw away

B. free oneself from

C. give up

D. do with

答案

1-5 D B C C A

解答题
单项选择题

阅读以下短文,回答下列题:


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,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体的复制提供了基础,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,揭示两者之间的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。

下列关于第四号染色体的说法,不正确的是( )。

A.第四号染色体的测序工作于2001年4月启动
B.水稻基因组第四号染色体的序列分析结果,可获得大量的农作物遗传信息和功能基因
C.水稻四号染色体着丝粒序列的完整测定,是迄今首次完成的高等生物染色体着丝粒序列
D.我国采用克隆步移法完成了对水稻基因组第四号染色体全长序列的精确测定