问题 阅读理解

While football fans feel strongly angry and shocked about mistakes made by referees (裁判) because they cannot see clearly what has happened, a small German company is quietly pleased.

For Carlos Technologies, mistakes made by referees are the kind of advertising that money cannot buy. The company has developed a tiny chip(芯片) that fits inside a football and determines whether the ball has crossed the goal line, by being able to discover its exact location on the field. The world football organization, FIFA, has shown interest in the technology. It is very possible that the new technology will be used in the 2006 World Cup in Germany.

"We've been testing the technology at the main soccer stadium in Nuremberg for some time and more recently in an under-17 FIFA Cup in Peru," said Gunter Rohmer, a director of the company. "The technology has performed well, and we're pretty optimistic that it will be used at the games in Germany next year."

The chip only weighs 12 grams, and is placed in the center of the football. It sends 2,000 signals a second to a receiver network of 12 antennas(天线),placed around the field. The receivers then send information about the ball's location to a central computer, and because it works in real time, it can immediately tell the referee whether a goal has been scored. The chip even can tell when the ball crosses the line in mid-air. Oliver Braun, one of the inventors of the chip, says that feedback from German referees was generally positive. Germany sports-wear giant Adidas is also optimistic about using this kind of chip in other ball sports.

FIFA aims to test the technology later this year at another game in Japan before deciding whether or not to introduce it in all 12 stadiums in Germany for next year's World Cup.

小题1: Carlos Technologies is pleased because ________.

A.football fans are angry with referees

B.their new product can satisfy football fans

C.their new product will have a good market

D.they can sell a lot of football in the future小题2:In the first sentence in Paragraph 2,"... mistakes made by referees are the kind of advertising that money cannot buy" means ___________.

A.Carlos Technologies can't afford the high price for advertising their product

B.Mistakes in production are also a kind of advertisement

C.Carlos Technologies has already spent a lot of money on advertising their product

D.Referees' mistakes will be of great help for the sale of Carlos Technologies' new product小题3:The underlined word "feedback" probably means ___________.

A.information given back by a user

B.advice given by someone

C.supplying food to customers

D.food given back by consumers小题4:The new product has drawn attention from some _________.

A.famous people

B.referees

C.big companies

D.countries

答案

小题1:C

小题1:D

小题1:A

小题1:C

问答题

小明和小华做“探究导体电阻大小与长度关系”的实验他们准备在图中的A、B两点间接入待研究的电阻丝,电源电压恒定,忽略灯丝电阻随温度变化的影响,待用电阻丝的规格如下:

序号材料长度横截面积
1炭钢合金丝LS
2镍铬合金丝LS
3镍铬合金丝L2S
4镍铬合金丝2LS
(1)他们应选择序号为______的两根电阻丝来探究;

(2)正确选择后,他们将所选电阻丝分别接入A、B两点间,闭合开关,通过观察灯泡的亮暗或电流表的示数来比较电阻丝电阻的大小.实验中,两次电流表指针均有偏转,但第二次的示数小于第一次的示数,说明第二次接人电路的电阻丝的阻值______(选填“较大”或“较小”),同时小华发现第二次实验中灯泡不亮,你认为原因是______

(3)以上(2)中判断电阻大小关系的方法在初中物理中经常用到,以下描述中能体现这种方法的是(______)

A、水压使水管中形成水流,类似地,电压使电路中形成电流

B、根据物质在常态下的形状和体积是否固定,可将物质分为三态

C.通过观察木块被运动物体撞后移动距离的大小,可比较运动物体动能的大小

D、研究滑动摩擦力大小与压力大小的关系,应控制接触面粗糙程度相同

(4)科学研究表明:在导体的材料、横截面积和温度相同的条件下,导体电阻的大小与长度成正比.你认为他们用上述(2)中的方案能否得到这个结论?请用欧姆定律加以解释.

(5)若电流表损坏,换用一只电压表,仍然利用上述器材来探究导体电阻的大小与长度是否成正比,请画出一个能反映该实验原理的电路图.(电阻丝用电阻符号表示,导线根数不限.)

单项选择题