What is implied but not directly stated in the passage is that_____

单选题 What is implied but not directly stated in the passage is that__________—．

A．young people have been the leaders in the fight against authority
B．today jeans are no longer looked down upon
C．jeans are the typical dress of civil rights marchers
D．formerly students were not allowed to wear cans to class

参考答案D

解析: D。本题的出题点在段尾的结果处(so)。根据原文第二段倒数第二句So it is natural that teenagers would defy parents and school administrators over the right to wear jeans to class…(所以很自然，年轻人会违抗父母及学校管理者的意愿，争取穿牛仔裤上学的权利)，由此可推知在此之前学生是不允许穿牛仔裤到学校的，A、B和c三项在文中均明确提及，故选D。

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单选题 The author is of the opinion that__________．

A．jeans are likely to be a short—lived fashion
B．jeans are popular only in the United States
C．jeans are likely to be popular for a long time to come
D．jeans are no longer fashionable

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单选题 The last two sentences imply that__________．

A．statesmen in the world are less competent than jeans
B．the inhabitants of the world should speak the same language
C．statesmen have failed to reach agreement on many major issues of the world
D．jeans will help statesmen to reach agreement on some world issues

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单选题根据以下资料，回答题：
        Parkour is a physical activity that is difficult to categorize．It is not an extreme sport，but an art or discipline that resembles self-defense in the martial arts．According to David Belle，the physical aspect of parkour is getting over all the obstacles in your path as you would in all emergency．You want t0：move in such a way，with any movement，as to help you gain the most ground on someone or somethin9，whether escaping from it or chasing toward it．Thus，when faced with a hostile confrontation with a person，one will be able to speak，fight，or flee．As
martial arts are a form of training for the fight，parkour is a form of training for the flight．Because of its unique nature，it is often said that parkour is in its own category：“Parkour is parkour．”
An important characteristic of parkour is efficiency．Practitioners move not only as fast as they Call，but also in the least energy-consuming and most direct way possible．This characteristic distinguishes it from the similar practice of free running, which places more emphasis on freedom ofmovements，such as acrobatics．Efficiency also involves avoiding injuries，short and long-term，part of why parkour' s unofficial motto is tre et durer(to be and to last)．
        Tracers claim that parkour also influences one’s thought process by enhancing critical thinking skills that allow one to overcome everyday physical and mental obstacles．There are fewer predefined movements in parkour than gymnastics，as it does not have a list of appropriate “moves.”Each obstacle a tracer faces presents a unique challenge on how they can overcome it effectively，which depends on their body type，speed and angle of approach，the physical make—up of the obstacle，etc．Parkour is about training the body mind to react to those obstacles
appropriately with a technique that works．Often that technique cannot and need not be classified and given a name．In many cases effective parkour techniques depend on fast redistribution of body weight and the use of momentum to perform seemingly impossible or difficult body maneuvers at speed．Absorption and redistribution of
energy is also all important factor, such as body rolls when landing which reduce impact forces on the legs and spine，allowing a tracer to jump from greater heights than those often considered sensible in other forms of acrobatics and gymnastics．
        There are many basic techniques that are emphasized to beginners for their versatility and effectiveness．Most important are good jumping and landing techniques．The roll，used to limit impact after a drop and to carry one’s momentum onward，is often stressed as the most important technique to learn．Many tracers develop joint problems from too many large drops and rolling incorrectly．Due to large drops parkour has sometimes received criticism for its questionable safety．Several communities in Great Britain have been warned by law enforcement or fire and rescue of the potential dangers of parkour．Although David Belle has never been seriously injured while practicing parkour，there is no careful study about the health issues of large drops and tracers stress gradual progression to avoid any problems．

Parkour is a physical activity that__________．

A．is categorized in extreme sports
B．will be useful when someone flees
C．originate from martial arts
D．can help us walk faster and faster

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