皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【简答题】
The Olympic Games are seen as the greatest test of an athlete’s ability and are supposed to celebrate the spirit of fair play. But in fact, sportsmen have been using drugs to cheat their way to victory since the Games first began. In the early years, athletes ate mushrooms(蘑菇)and plant seeds to improve their performance. Nowadays, this kind of cheating has a name doping(服用兴奋剂). Just last month, Britain’s top sprinter(赛跑选手) Dwain Chambers and several American athletes tested positive(呈阳性)for the drug THG. Until a coach secretly gave a sample of THG to scientists, no one knew how to test for it. “We’re like cops(警察)chasing criminals—athletes are always adapting and looking for areas we haven’t investigated,” said Jacquew de Ceaurriz, a French anti-doping expert. Since the first drugs test was carried out at the 1968 Olympics in Mexico City, many cheats have been caught out. The most famous case in history is that of Canadian sprinter Ben Johnson. He broke the 100 meters world record in winning gold at the 1988 Seoul(汉城)Olympics. But days later, he tested positive for drug use, lost his gold medal and was banned from the sport. Five years later, he returned to action—only to be found positive again and banned forever. China has also had problems with drug cheats. At the 1994 Asian Games, 11 Chinese athletes—seven of them swimmers—tested positive for banned drugs. Sports organizations promised th at cheating on this scale would not happen again. Experts are also worried that doping can damage a person’s health. It is believed to increase the risk of liver and kidney(肝肾)diseases, and women may experience reproductive(生育) problems. As long as they can stay ahead of the scientists, it is unlikely the cheats will stop. But experts say there is a limit to what can be achieved and that athletes will not be able to change their bodies using gene(基因)technology. “For the moment, genetic doping does not exist,” said de Ceaurriz. “Even in 10 or 15 years it will not be done easily—the scientific community(界)will not let it happen.” (  ) 60. Which of the following is not the way that some athletes cheat to their better sports achievements? A.Eating mushrooms.        B Taking drug THG. C. Taking genetic doping.       D. Eating plant seeds. (  ) 61. How many countries are mentioned in the passage in which there were athletes doping? A. Two.                 B. Four.                C. Sic.                  D. Eight. (  ) 62. We can infer from the passage that ____. A.scientists get a lot of information about drugs before the athletes take doping B.taking doping will never happen again because of the serious test C.few athletes used drug cheats before the first drugs test was carried out at the 1968 Olympics D.problems with drug cheats are still serious though they are severely tested (  ) 63. Which statement of the following is true? A.Many police are sent to chase criminals of taking doping during the Olympic Games. B.The drug test was carried out until the 1968 Olympics. C.There is the possibility that women athletes taking doping will give no birth to a child. D.Ben Johnson was banned from sports forever for being tested positive for drug use at the 1988 Seoul Olympics.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】下列不属于微生物分类鉴定中通过核酸分析鉴定微生物遗传型的方法是
A.
核酸含量分析
B.
核酸分子杂交法
C.
DNA碱基比例的测定
D.
rRNA寡核苷酸编目分析
【单选题】细胞壁的成分和分子结构被用于分类鉴定中的微生物主要是(    )。
A.
原核生物  
B.
酵母菌  
C.
霉菌  
D.
蕈菌
【单选题】关于微生物分类鉴定的方法描述不正确的是__________。
A.
通过对某一未知纯微生物培养物的各种性状特征研究之后确定其应归属那个分类群的过程被称为分类
B.
细菌的鞭毛抗原又称H抗原
C.
API系统中厌氧菌可用API-20A来进行鉴定
D.
DNA碱基组成是各种生物的一个稳定特征
【单选题】下列传统分类指标中始终被用作微生物分类和鉴定的重要依据的是()
A.
形态学特征
B.
生理特征
C.
生态学特征
D.
分子生物学特征
【判断题】啦啦队运动一开始就有女性运动员参加。
A.
正确
B.
错误
【多选题】变速器按操纵方式不同可分为( )三种。
A.
手动变速器
B.
自动变速器
C.
半自动变速器
D.
5档式
【单选题】微生物分类鉴定中DNA碱基比例是指
A.
(A+T)mol%
B.
(G+A)mol%
C.
(G+C)mol%
D.
(T+C)mol%
【单选题】变速器按操纵方式不同可以分为( )。
A.
人力换挡和动力换挡
B.
手动挡和自动挡
C.
人力换挡和自动挡
D.
手动挡和动力换挡
【单选题】温水擦浴主要运用了何种散热方式:
A.
出汗
B.
对流
C.
传导
D.
挥发
E.
散热
【多选题】目前,在微生物的分类鉴定中人们使用的方法有哪些?
A.
经典分类
B.
系统分类
C.
数值分类
D.
形态分类
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题