A good example of this occurred with a group of dogs. They were penned up in an area that was being shaken by a series of tiny earthquakes. (Several small quakes often come before or after a large one。) Before each quake a low booming sound was heard. Each boom caused the dogs to bark wildly. Then the dogs began to bark during a silent period. A scientist who was recording tile quakes looked at his machine. It was acting as though there were a loud noise too. The scientist realized that the dogs had reacted to a booming noise. They also sensed the tiny quake that followed it. The machine recorded both, though humans felt and heard nothing。
In this case there was a machine to monitor what the dogs were sensing. Many times, however, our machines record nothing out of the ordinary, even though animals know a quake is coming. The animals might be sensing something we so measure but do not recognize as a warning. Discovering what animals sense, and learning how they know it is a danger signal, is a job for future scientists。
1.Since no one had predicted the precise date of the earthquake striking east of Naples, people there suffered heavy loss in the destruction。
2.A seismic gap is located at the junction of two interlocking plates in the Earth, and where no seismic activity has been recorded for a long time。
3.From the passage we learn that a regular striking pattern can be found in an active earthquake region。
4.During an earthquake in China 1975, cows broke their halters and ran away from their sheds。
5.As it is used in Paragraph 13, the word “cat” refers to a typical domestic cat。
6.All animals but men can notice tiny changed in air pressure, gravity, or the magnetism of Earth。
7.The dogs mentioned in Paragraph 15 had sensed both the low booms and the minor quakes following them。
1. ［Y］［N］［NG］2.［Y］［N］［NG］3.［Y］［N］［NG］
4. ［Y］［N］［NG］5.［Y］［N］［NG］6.［Y］［N］［NG］
7. ［Y］［N］［NG］
8.Dr. Caputo based his prediction upon the fact that lots of earthquakes had recently occurred in all areas around Naples but its___________。
9.According to the author’s information, every 50 years or so, a mighty earthquake will be recorded at___________________。
10.Chinese scientists evacuated people from_____________after they had noticed the strange behavior of some animals as well as physical changes in the earth。 |
