2014年是北美自由贸易区成立20周年，自成立以来三国贸易翻了3倍，2008年达到9490亿美元。这说明(   )

    I have1good friend and his name is Jack. Here are his2about his life in twenty years. Jack will be a policeman in twenty years because he thinks it's an exciting job. He will live and work3Beijing, because it's a very beautiful city and he likes it very much. He4taller and stronger and he will have short straight hair. In his free time, he will play5sports to6. He will play tennis every day and he will go swimming and skating on weekends. He will7smart clothes like uniform. Jack will have a happy family. Maybe he will have two8. They will be lovely and cute and he will love them very much. Now he9and tries his best10his predictions come true.

如图是德国设计师设计的一个球形透镜太阳能系统，通过透镜聚光之后再发电．此透镜是一个（　　）

下列有关文学常识的表述，正确的一项是（  ）