【单选题】听力原文: During the 19th century, it was common to hear people in Europe and America say that the resources of. the sea were unlimited. For example, a noted biologist writing in the mid 19th century comm...
【简答题】During the 19th century, it was common to hear people in Europe and America say that the resources of the sea were unlimited. For example, a noted biologist writing in the mid-19th century commented t...