问题 单项选择题

中国社会科学院生命伦理专家邱仁宗表示,“禁止克隆人并不意味着禁止克隆技术。科学技术从来就是双刃剑,各国都应加强克隆技术的规范和管理。”右图所示为人类“治疗性克隆”的大概过程,以下说法正确的是()

A.“治疗性克隆”的过程中涉及到转基因、核移植、细胞培养、胚胎移植等现代生物技术

B.“治疗性克隆”的结果说明动物细胞具全能性

C.“治疗性克隆”的过程中有细胞的分裂和分化

D.“治疗性克隆”的器官在移植方面的主要优点是其遗传物质与患者完全相同,没有免疫排斥反应

答案

参考答案:C

解析:

“治疗性克隆”的过程中涉及到转基因、核移植、细胞培养等现代生物技术,不涉及胚胎移植;“治疗性克隆”的过程中有细胞的分裂和分化,其结果只能说明动物细胞核具有全能性;“治疗性克隆”的器官在移植方面的主要优点是其细胞核中的遗传物质与患者完全相同,没有免疫排斥反应,所以C选项正确。

考点:治疗性克隆

点评:本题考查治疗性克隆,属于对识记、理解层次的考查。

阅读理解

阅读理解

     Don't_believe_all_of_the_stereotypes(模式化的形象)you_may_have_heard_about_Americans.Even the ones that are true in general may not be true about specific individuals or a large part of the population.For example,although Americans tend to be louder than people from other cultures(especially at athletic

events),many of the people you meet will be quiet and polite.Some people may be intolerant, but most will be pleasant and welcoming.Remember that American films and television exaggerate(夸张)in order to

generate excitement, and so present a rather false picture of what life in the United States is really like.

Therefore,tourists in the US are not always on their best behavior.

     Americans do tend to be more informal than people from other countries.It is common for Americans

to wear casual clothing to school and to greet professors by first name.However, good manners and

politeness are always appreciated.If you are polite, and dress a little more formally than your American

friends, it will not be poorly thought of.

     However,some businesses require their employees to wear a uniform or a suit.It would be improper to wear a Tshirt and blue jeans to a job interview.Some of the more prestigious restaurants require a coat and a tie.Americans tend to dress up for cultural events(the opera,theater and ballet)and to dress down for

athletic events.Formal wear is required at weddings and funerals, or any other event with religion.If you

rely on the stereotypes,you will likely put yourself into an embarrassing situation.

1. The underlined sentence probably means________.

A. some of the stereotypes you may have heard about Americans are not true

B. you should not believe the stereotypes you may have heard about Americans

C. none of the stereotypes you may have heard about Americans should be believed

D. none of the stereotypes you may have heard about Americans should not be believed

2.The passage is probably written for________.

A. businessmen  

B. visitors to America

C. American students  

D. American filmmakers

3.The second paragraph suggests that________.

A. most Americans are polite

B. people who are polite are welcome

C. casual clothing makes others uncomfortable

D. American students are impolite to their teachers

4. We can learn from the passage that________.

A. American films are mostly poor comedies

B. it is good manners to wear blue jeans to a wedding

C. Americans usually wear formal clothes in a theater

D. to dress formally makes others feel you are not easy

to get on with

单项选择题