阅读理解 Samuel Finley Breese Morse was a talented artist and teacher who became famous for an invention that sprang from a hobby. He invented the telegraph. Morse financed his innovation by painting and 题目和参考答案——青夏教育精英家教网—

阅读理解

　　Samuel Finley Breese Morse was a talented artist and teacher who became famous for an invention that sprang from a hobby. He invented the telegraph. Morse financed his innovation by painting and teaching art at New York University. Despite the discouraging comments of his fellow professors, Morse toiled at the telegraph until it was perfected. The next problem was to create a vocabulary for his invention—a special language without words.

　　Morse's idea was to have an alphabet made entirely of symbols which could be sent over a telegraph wire, thereby hastening the transmission of messages. He came up with a system of dots (小点) and dashes (破折号) which could be “tapped” on the telegraph, arranged in combinations to represent every letter in the alphabet.

　　The United States Congress became curious about this invention and invited Morse to Capitol Hill for a demonstration of his telegraph on May 24, 1844. Morse demonstrated his skills by sending a message from Washington, D. C. , to Baltimore. That message was successfully transmitted and received, and a new era in communications technology was born.

　　Today, the Morse Code (摩尔斯码) is so widely used that it is no longer considered a secret language. One advantage to the code, despite its seeming mystery, is that a variety of “telegraph” instruments may be used—finger tapping buzzers (蜂间器), whistles (口笛), lights, and even flags.

　　Flag transmission is relatively simple to perform, but it requires special equipment. In areas with dark backgrounds, a white flag which a small square of red in the center is preferred. Conversely, in areas featuring a light background, a dark colored flag with a small square of white in the center is most efficient.

　　The flag code involves three movements, all of which be-gin and end with the flag being held perpendicular (成直角的) in front of the sender. A dot is created by swinging the flag down to the right and back in position; a dash is made by swinging the flag down to the left and back. An interval (间歇) is created by waving the flag down in front and back in position. There are no pauses between dots and dashes, but pauses are used to indicate the end of a letter. One interval indicates the end of a word, two signify the end of a sentence, and three intervals indicate the message's end.

　　Morse Code is thus remarkable not only for its efficiency, but also for its versatility and relative ease of use.

1．Aside from inventiong Morse Code, Samuel F. B. Morse was also famous for ________.

[　　]

A．his invention of the telegraph

B．being invited by the United States Congress to Capitol Hills

C．teaching art history

D．his talent as an artist

2．The main purpose of Morse Code was to provide ________.

[　　]

A．a secret language

B．a language for people who couldn't speak

C．an efficient means of sending messages by telegraph

D．a new alphabet

3．Morse provided part of money for his invention by mean of ________.

[　　]

A．teaching art

B．painting house

C．working as a messenger

D．demonstration of his telegraph

4．It can be inferred from the passage that Morse Code ________.

[　　]

A．made Morse an important political figure

B．transformed the world of communications technology

C．was the forerunner of the telephone

D．made Morse rich

5．The author states that an advantage of Morse Code is ________.

[　　]

A．its military application

B．its mysterious meaning

C．that messages can be transmitted and received successfully

D．that people can use it with various instruments

答案：A;C;A;B;D

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