This is the first X-ray photograph.It was 36 by a German scientist,Wilhelm Conrad Roentgen,in 1895. It is his wife's 37 . The bones(骨骼) in her hand (and also her ring) are clearly I seen in the photo.

   Roentgen discovered X-rays 38 when he was working with electricity. Soon after,he 39 the first X-ray machine. The machine made hospital operations (手术) much 40 . For the first time,doctors could see inside people’s bodies 41 they cut them open!In 1901,Roentgen won the very first Nobel Prize in Physics. His invention is still used today by doctors and 42 ,and is called “the window into the human body”.

   Since the introduction of computer imaging (成像) in the 1970s,X-ray machines have been used 43 other things,too. At airports,many criminals are caught with illegal(违法的) things in 44 luggage(行李) .Also,lots of works of art are discovered under other paintings. In factories,many 45 in new products are found every day,using X-rays. There is no doubt that new uses for X-rays will be developed in the future.

() 36. A. taken   B. made   C. found   D. invented

() 37. A. face   B. hand   C. foot   D. head

() 38. A. for sure   B. in fact   C. at least   D. by accident

() 39. A. used   B. broke   C. built   D. bought

() 40. A. safer   B. mote dangerous   C. cheaper   D. more expensive

() 41. A. since   B. when   C. before   D. after

() 42. A. tourists   B. engineers   C. dentists   D. teachers

() 43. A. for   B. to   C. with   D. from

() 44. A. his   B. her   C. its   D. their

() 45. A. colors   B. faults   C. styles   D. parts

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