B A powerful earthquake measuring 7.0 on the Richter scale shook Haiti on Tuesday, causing several buildings to collapse in the Western hemisphere's poorest nation and leading to an unknown number of fatalities（死亡）, officials and witnesses said. The earthquake was centered just 10 miles southwest of the crowded and impoverished（贫困的）capital of Port-au-Prince（太子港）. matters worse, the earthquake was relatively shallow, at a depth of five miles, the U.S. Geological Survey said Shallow earthquakes can cause more damage. “I think it's really a huge catastrophe,” Haiti's ambassador to the U.S., Raymond Alcide Joseph, told Cable News Network. An Associated Press（美联社）videographer saw the ruins of a hospital in Petionville, near Port-au-Prince. Reuters（路透社）news agency said several buildings had crumbled in the capital and that there were dead and injured trapped in the rubble. At least 1.8 million people live within the area where the earthquake had its highest intensity, John Bellini, a geophysicist at the USGS, told The Wall Street Journal. “With a strong and shallow earthquake like this in such a populated area, it could really cause substantial damage.” he said. “The quake was the most powerful to hit Haiti since at least 1770. This isn't normally an earthquake-prone（地震频发）area.” Mr. Bellini added. Within minutes of the original quake, two aftershocks rolled through the area, measuring 5.9 and 5.5 on the Richter scale. 60. The main purpose of this passage is to ________. A. tell people some disasters are very erous. B. introduce some common sense of natural disasters. C. appeal to readers for help, love and support. D. present some information of Haiti’s earthquake this year. 61.What can we learn from John Bellini’s words? A. The earthquake which took place in Port-au-Prince was strong and shallow. B. Thanks to the shallow earthquake, it did little damage to Port-au-Prince. C. Earthquakes occur frequently in the area of Port-au-Prince,capital of Haiti. D. At least 1770 people lost their lives in the earthquake. 62. The underlined word catastrophe is closest in meaning to __________. A. problem B. disaster C. phenomenon D. news 63. How many earthquakes of Haiti are mentioned in this article? A. None. B. One C. Two. D. At least three.