单选

Passage Three

  • After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had news to report: The damage and death toll could have been much worse.    More than 60 people died in this earthquake. By comparison, an earthquake o
  • In addition, changes made to the construction codes in Los Angeles during the last 20 years have strengthened the city ’ s buildings and highways, making them more resistant to quakes.Despite the good news, civil engineers aren’t resting on their successe
  • In the past, making structures quake - resistant meant firm yet flexible materials, such as steel and wood, that bend without breaking. Later, people tried to lift a building off its foundation, and insert rubber and steel between the building and its fou
  • A.new computers had been installed in the buildings
  • B.it occurred in the residential areas rather than on the highways
  • C.large numbers of Los Angeles residents had gone for a holiday
  • D.improvements had been made in the construction of buildings and highways
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