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51. While Jackie Robinson was a Brooklyn Dodger, his courage in the face of physical threats and verbal attacks was not unlike that of Rosa Parks, who rused to move to the back of a bus in Montgomery, Alabama.

52. The rising cost of data-processing operations at many financial institutions has created a growing opportunity for independent companies to provide these services more ficiently and at lower cost.

53. There is no consensus on what role. if any, is played by acid rain in damaging or slowing the growth of forests in the eastern United States.

54. Galileo was convinced that natural phenomena, as manifestations of the laws of physics, would appear the same to someone on the deck of a ship moving smoothly and uniformly through the water as to a person standing on land.

55. A recent study has found that within the past few years, many doctors have elected to retire early rather than face the threats of lawsuits and the rising costs of malpractice insurance.

56. Architects and stonemasons, the Maya built huge palace and temple clusters without the benit of animal transport or the wheel。

57. In astronomy the term "red shift" denotes the extent to which light from a distant galaxy has been shifted toward the red, or long-wave, end of the light spec­trum by the rapid motion of the galaxy away from the Earth.

58. William H. Johnson&aposs artistic debt to Scandinavia is evident in paintings that range from sensitive portraits of citizens in his wife&aposs Danish home, Kerteminde, to awe-inspiring views of fjords and mountain peaks in the western and northern regions of Norway.

59. In 1978 only half the women granted child support by a court received the amount awarded; more than a million others had no support agreements whatsoever.

60. According to a recent poll, owning and living in a freestanding house on its own land is still a goal of a majority of young adults, as it was of earlier generations