The story happens on an island (岛)called

立中寓破

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     We know the famous ones-the Thomas Edisons and the Alexander Graham Bells-but what about the

less famous inventors? What about the people who invented the traffic light and the windshield wiper(雨

刮器)?Shouldn't we know who they are?

     Joan McLean thinks so. In fact,  McLean,  a professor of physics at Mountain University in Range, 

 feels so strongly about this matter that she's developed a course on the topic. In addition to learning

"who" invented "what",  however,  McLean also likes her students to learn the answers to the "why"and

"how"questions. According to McLean, "When students learn the answers to these questions,  they are

better prepared to recognize opportunities for inventing and more motivated to give inventing a try."

      Her students agree. One young man with a patent for an unbreakable umbrella is walking proof of

McLean's statement."If I had not heard the story of the windshield wiper's invention, "said Tommy Lee,

  a senior physics major, "I never would have dreamed of turning my bad experience during a rainstorm

into something so constructive." Lee is currently negotiating to sell his patent to an umbrella producer.

     So,  just what is the story behind the windshield wiper? Well,  Mary Anderson came up with the idea

in 1902 after a visit to New York City. The day was cold and stormy, but Anderson still wanted to see

the sights,  so she jumped aboard a streetcar. Noticing that the driver was struggling to see through the

snow covering the windshield,  she found herself wondering why there couldn't be a builtin device for

cleaning the window. Still wondering about this when she returned home to Birmingham, Alabama.

Anderson started drafting out solutions. One of her ideas,  a lever(操作杆) on the inside of a vehicle

that would control an arm on the outside,  became the first windshield wiper.

      Today we benefit from countless inventions and innovations. It's hard to imagine driving without

Garrett A. Morgan's traffic light. It's equally impossible to picture a world without Katherine J. Blodgett's

innovation that makes glass invisible. Can you picture life without clear windows and eyeglasses?

1. By mentioning "traffic light" and "windshield wiper",  the author indicates that countless

     inventions are________.

A. beneficial,  because their inventors are famous

B. beneficial,  though their inventors are less famous

C. not useful,  because their inventors are less famous

D. not useful,  though their inventors are famous

2. Professor Joan McLean's course aims to________.

A. add colour and variety to students' campus life

B. inform students of the windshield wiper's invention

C. carry out the requirements by Mountain University

D. prepare students to try their own inventions

3. Tommy Lee's invention of the unbreakable umbrella was________.

A. not eventually accepted by the umbrella producer

B. inspired by the story behind the windshield wiper

C. due to his dream of being caught in a rainstorm

D. not related to Professor Joan McLean's lectures

4. Which of the following can best serve as the title of this passage?

A. How to Help Students to Sell Their Inventions to Producers?

B. How to Design a Builtin Device for Cleaning the Window?

C. Shouldn't We Know Who Invented the Windshield Wiper?

D. Shouldn't We Develop Invention Courses in Universities?

在Access中，总计函数“Avg”是用来对数据( )

A．求和
B．求平均值
C．求最大值
D．求最小值

读图（我国某地的地理要素日变化曲线图），纵轴起始点为0，图中曲线最不可能是（）

A.太阳辐射日变化曲线

B.地面辐射日变化曲线

C.气温日变化曲线

D.受雾影响的能见度曲线