【单选题】听力原文: More than 50 percent of all homes in the U.S. have one thing in common people living in them keep one or two small animals as pets. In fact there are more pets in the U.S than children. Why? Res...
【简答题】In this section, you will hear a passage twice. You are required to choose one of the four choices marked A), B), C) and D) which stands for the exact word you have heard Researchers at the National [...
【单选题】In 1992, the bilateral agreement of the U.S. with the European Union regarding the subsidies for production of civil aircraft included that : a. direct government support for new airplane development ...