Once upon a time there was a wise man that used to go to the sea to do his writing. He had a habit of walking on the beach before he began his work.One day he was walking along the shore.As he looked down at the beach,he saw a human figure moving like a dancer.He smiled to himself at the thought that someone would dance on the beach.So he began to walk faster to catch up.As he got closer, he saw that it was a young man and the young man wasn’t dancing,

but instead he was reaching down to the shore,picking up something and very gently throwing it into the ocean.As he got closer, he called out,“Good morning! What are you doing?” The young man paused,looked up and replied,“Throwing starfishes(海星)in the ocean.”

      “I guess I should have asked,why are you throwing starfishes in the ocean?”

      “The sun is up and the tide is going out,And if I don’t throw them in,they’ll die.”

      “But, young man,don’t you realize that there are miles and miles of beach and starfishes all

 along it.You can’t possibly make a difference!”  

      The young man listened politely.Then he bent down,picked another starfish and threw it  into the sea,and said,“It made a difference to that one.”There is something very special in each and every one of us.We have all been gifted with the ability to make a difference.And if we can know that gift,we will gain through the strength of our vision the power to shape the future.

    We must each find our starfish.And if we throw our starfish wisely and well,the world will be better. 

 

56.One day, the wise man saw a young man            

A.dancing along the beach with starfishes   

B.walking with a dancer

C.picking up starfishes for sale

D.trying to save as many starfishes as possible

57.The underlined words“something very special”refers to        

      A.the gifts from friends                                   B.the strength of making decisions

      C.our own starfish                                         D.the ability to make a difference

58.From the last two paragraphs,we can learn that       

      A.the wise man realized something new and important

      B.the wise man thought it was foolish of the young man to throw starfishes in the ocean.

      C.the young man had the ability to save only one starfish

      D.it is necessary for us to save starfish on the beach

59.The writer told this story to show us            

      A.how and where we can write a good article

      B.everyone can do something for the future

      C.wise men ore sometimes stupid

      D.young men are in fact wiser than old people

It was a dark November day in 1895. In a laboratory at the royal University of Wurzburg, in western Germany, a 50-year-old physics professor, Wilhelm Roentgen, performed what looked like a type of magic. He placed a glass vacuum(真空)tube inside a black cardboard box and applied a high-voltage current(高压电流). He suddenly noticed that, on a bench nearby, a piece of paper coated with a chemical substance began giving off an strange light. Over the following two weeks, Roentgen performed a series of experiments that proved the existence of a form of electro-magnetic(电磁的)radiation he called X-rays.

His astonishing discovery has led to a deeper understanding of the physical world----in particular, to the field of medical diagnosis(诊断).

X-rays are widely used in medicine to make radiographs or X-rays pictures of the bones and internal organs of the body to see whether diseases exist, such as broken bones or lung diseases.

A radiograph is made by passing an X-rays beam through a patient’s body onto a piece of photographic film. The bones takes in more of the rays than do muscles or other organs, so the bones throw the sharpest shadows on the film.

Improvements over the past century----from fluoroscopy(荧光透视法)to CT scans---- have made X-rays technology an invaluable tool of medicine.

 

78. At the beginning of the passage, Prof. Wilhelm Roentgen was _______.

A. performing an entertaining program                            B. playing magic

C. doing some experiments                                            D. None of above

79. When Prof. Roentgen placed a glass vacuum tube in a black box and applied a high-voltage current, he _______.

A. saw a bench nearby

B. noticed a piece of paper on a nearby bench begin to burn slowly

C. noticed a piece of paper on a nearby bench begin to give out strange light

D. noticed a piece of paper was coated with a chemical substance

80. The bones have clearer shadow on the photographic film than do muscles or other organs, because ______.

A. the bones are harder than them

B. the bones can help absorb more rays than them

C. the bones can block more rays than them

D. X-rays cannot pass through the bones

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网