如图所示，小球从竖直砖墙某位置由静止释放，用频闪照相机在同一底片上多次曝光，得到了图中1、2、3、4、5…所示小球运动过程中每次曝光的位置．连续两次曝光的时间间隔均为T，每块砖的厚度为d，根据图中的信息，下列判断正确的是（   ）

提倡新文学，以白话文代替文言文。与这一主张相关的历史事件是（   ）

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下面画一横线，并在该词下面写出修改后的词。

注意：1). 每处错误及其修改均仅限一词；

      2). 只允许修改10处，多者（从第11处起）不计分。

    The other day, some of my classmates and I took a bicycle trip along the "Huan Shan Green Road", that was specially built for people to relax ourselves. The scenery along the road was fascinating, with trees, flowers, hills and lakes on both side. We stopped by a lake for a rest, where a great many of people are playing happily. But something unpleasant caught our eyes. There was rubbish here or there, and there were many plastic bags and bottles floated on the surface of the lake. Such beautiful place was so serious polluted. What a shame! In the end, we couldn't help collecting the rubbish after we left.

   Hangzhouhua (杭州话)：use it or lose it
   There are about 6.000 languages in the world and some experts say that as many as half of these languages will disappear(消失) in the next one hundred years. Will Hangzhouhua be one of ____ ? It's a ____  that more people are asking.
   In China, Putonghua is the official language. That ____  it's the language of government, business and the media (媒体). And it's also the language that is____  in schools.
   Hangzhou is a special city. It used to be the capital of Wu and Yue States in the 10th century during the Five Dynasties period. Now it is modern, fashionable and also beautiful. And Hangzhouhua shows that by being modern, fashionable and beautiful.
   Young people still speak Hangzhouhua but not as ____  as their parents and grandparents. They are under more and more pressure to speak Putonghua. So the language is being used____  often in everyday life. Some people want to keep the language from disappearing completely ____  building museums and having cultural festivals to save it. But a language isn't a painting ____ a book. It's a living thing and you ____  use it or lose it.
   If people ____  using it in their daily lives, a museum or a festival will not help. It will be lost forever, like the Yangtze River dolphin.