自从“创新实践”栏目举办“我出题你发明”活动后,不少同学针对栏目提出的发明课题,自己动手、动脑研制出发明作品,并写成稿件寄给我们。我们从中选出几件作品刊登在本期上。你认为这些发明作品怎么样?如果你对这些发明作品又有一些新的或不同的想法,也可来信告诉我们,也许下期刊登的就是你的作品呢! Since the “I invented the invention of you” campaign was held in the column of “Innovation and Practice”, many students developed their own inventions for the topics of the inventions proposed in the columns, and wrote them into manuscripts and sent them to us. We selected several works from this issue for publication in this issue. What do you think about these inventions? If you have some new or different thoughts about these inventions, you can also tell us by letter that maybe your works will be published in the next issue!