题目

阅读理解 On September 1, 1985, Dr. Robert Ballard and his crew spotted one of Titanic's boilers. They erupted with cheers. By the time of the crew's discovery, 73 years had passed since the ship sank. Several missions had set off to look for it, including a 1977 one led by Ballard. In the early 1980s, Ballard asked the U. S. Navy to fund the development of the Argo, an unmanned camera sled that could be dragged behind a surface ship at depths of up to 20, 000 feet. The Navy were interested in using the Argo to survey the wrecks （沉船）of the U. S. S. Thresher and Scorpion, two nuclear submarines (潜水艇) that had been lost in the North Atlantic. They eventually agreed that if Ballard could successfully locate and map the two subs, he could use whatever time left to look for Titanic. While photographing Thresher and Scorpion, Ballard noticed that the current had carried debris (碎片) from the ships as they fell to the seafloor, creating a long chain. With this in mind, he decided not to search for Titanic's main body. Instead, he would use Argo to search for its much larger debris track, which might stretch as far as a mile. Once he found it, he could use it to track down the ship itself. With the new approach, after a few days, they discovered the boiler. Argo stalked the debris track, and the following morning, Titanic's bow came out of the inky depths. "The Titanic lies now in 13, 000 feet of water," Ballard said at a press conference, "There is no light at this great depth and little life can be found. It is a quiet and peaceful place-and a fitting place for the remains of this greatest of sea tragedies to rest. Forever may it remain that way." （1） Why did the Navy support the development of the Argo? A . To develop underwater robots. B . To locate the wreck of Titanic. C . To find two nuclear submarines. D . To map the North Atlantic. （2） What gave Ballard inspiration for the new search method? A . The 1977 search attempt. B . The surface ship with the Argo. C . The photographs of Titanic. D . The debris chain of the submarines. （3） What does the underlined word "stalked" in paragraph 3 mean? A . Traced. B . Recognized. C . Cleared. D . Dragged. （4） What is the purpose of Ballard's statement at the press conference? A . To share the exact position of Titanic. B . To advocate leaving Titanic undisturbed. C . To launch surveys on sea tragedies. D . To show respect for Ballard's crew. 答案： C D A B

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