一把缩放尺可以让你在画画时自由地放大或缩小;一杆能纠正握笔姿势的自动铅笔,让你写出一手漂亮的字……河南开封二师附小学生的小发明,是不是很有趣、很棒呢?河南开封二师附小每年举办一次“神舟”科技活动,包括科技小发明、创 A zoom ruler allows you to freely zoom in or zoom out; a rod can correct the pen posture to keep the pencil, so you write a beautiful hand ... ... Kaifeng, Henan Province, two primary school pupils with the invention, is not it Very interesting, great? Henan Kaifeng two teachers attached to a small annual held “Shenzhou ” scientific and technological activities, including small inventions, a record