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２００１年秋季起在全国普遍使用的全日制普通高级中学教科书（试验修订本·必修）第一册１９２页《研究平抛物体的运动》图实－１２（如图１），是不准确的，原因如下：平抛运动可分解为水平方向的匀速运动和竖直方向的自由落体运动，因而从抛出点开始在连续相等的时间内竖直
The fact that the full-time ordinary high school textbooks (experimental revisions of the compulsory version) in the first half of 2001 that were widely used throughout the country on page 192 of the “Study on the motion of flat objects” (Figure 1) is inaccurate. The reason is as follows: The flat throwing motion can be decomposed into a horizontal uniform motion and a vertical free-fall motion, so that the throwing point is vertical in the continuous and equal time.