D. either tram route 70 or 75

　　31．Sea Life Melbourne Aquarium offers visitors ________.

　　A. free car parking

　　B. wheelchair access

　　C. Internet connection

　　D. transportation service

　　32．Tickets to Sea Life Melbourne Aquarium ________ .

　　A. are free to all visitors

　　B. can be purchased by email

　　C. are checked at the entrance

　　D.can be printed at the ticket office

　　D

　　Scientists today are making greater effort to study ocean currents (洋流) . Most do it using satellites and other high-tech equipment. However, ocean expert Curtis Ebbesmeyer does it in a special way --- by studying movements of random floating garbage. A scientist with many years’ experience, he started this type of research in the early 1990s when he heard about hundreds of athletic shoes washing up on the shores of the northwest coast of the United States. There were so many shoes that people were setting up swap meets to try and match left and right shoes to sell or wear.

　　Ebbesmeyer found out in his researches that the shoes — about 60,000 in total — fell into the ocean in a shipping accident. He phoned the shoe company and asked if they wanted the shoes back. As expected, the company told him that they didn't. Ebbesmeyer realized this could be a great experiment. If he learned when and where the shoes went into the water and tracked where they landed, he could learn a lot about the patterns of ocean currents.

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