现在有很多同学写字姿势不正确,长此以往,可能会造成近视和脊柱弯曲。因此,我想发明一种纠正姿势的笔。这种笔的笔身上有红、黄、蓝三个指示灯:黄灯亮时,说明你的坐姿不正确,要坐端正;红灯亮时,说明你的握笔姿势不对,要改正;蓝灯亮时,说明你的眼睛离作业本太近,要隔远一点。有了 There are many students writing incorrect posture, the long run, may cause myopia and spinal curvature. Therefore, I want to invent a pen to correct the posture. This pen pen body red, yellow, blue three lights: yellow light, indicating that your posture is not correct, to sit correct; red light, indicating that you hold the pen posture is wrong, to be corrected; blue light When, that your eyes close to homework, to be far away. There