No one knows what our life will be like in the future. Here are some children's  1.

    Cindy: In the future, people will have more holidays. They2a lot of time to travel around the world. Maybe some families will go to the moon  3 their holidays.

    Gary: I think the earth will be more crowded and polluted. Maybe some people will 4  their houses on other planets.

    Sarah: Students in the future won't need to go to school and they will study at home. What will happen  5 students have problems with a subject? They will  6with a teacher through videoconferencing (视频会议).

    Peter: In the future, people will speak fewer languages. Maybe there will be  7one language in the world. And it will be much  8 for people to talk with each other.

    Laura: Robots will play an important role in our life. 9will help humans do all kinds of work.

    These predictions may seem impossible today, but I10 they will come true one day because we never know what will happen in the future.

如图，光源L距地面（LN）8米，距正方体大箱顶站（LM）2米，已知，在光源照射下，箱子在左侧的影子BE长5米，求箱子在右侧的影子CF的长．（箱子边长为6米）

阅读下面文言文选段，完成后面问题。

      （沈约）孤贫，笃志好学，昼夜不释卷。母恐其以劳生疾，常遣减油灭火。而昼之所读，夜辄诵之，遂博通群籍，善属文。济阳蔡兴宗闻其才而善之，及为郢州，引为安西外兵参军，兼记室。兴宗常谓其诸子曰：“沈记室人伦师表，宜善师之。”

                                                                                                                                                             （节选自《南史·沈约传》）

下图为漫画《沉重的铁锤连续地打在蒋介石的脊骨上》，图中三个铁锤分别指刘邓、陈谢和陈粟，这幅漫画所反映的事件意义在于