科学实验方案是根据特定实验目的而设计的．学习了“酸能使紫色石蕊试液变色”的知识后，进一步了解到“盐酸能电离产生H⁺和Cl^﹣，氯化钠能电离产生Na⁺和Cl^﹣”．为深入研究某一问题，小科同学设计了如图所示的实验方案，请回答：

观察图示，回答问题．

根据表格内容完成下面的短文，每空词数不限。

    Scott doesn't go to work on Sunday. On Sunday morning, he usually gets up late. He gets up at ____. After breakfast, he usually reads books or listens to music for ____. After that, he often ____ with his friends. In the afternoon, Scott ____ from 3:00 to 5:00. The Sunday evening is relaxing for Scott. He usually ____. Scott needs a good sleep. So he ____ and goes to bed at ____.

如图所示,空间存在足够大的竖直向下的匀强电场,带正电荷的小球（可视为质点且所受电场力与重力相等）自空间O点以水平初速度v₀抛出,落在地面上的A点,其轨迹为一抛物线．现仿此抛物线制作一个光滑绝缘滑道并固定在与OA完全重合的位置上,将此小球从O点由静止释放,并沿此滑道滑下,在下滑过程中小球未脱离滑道．P为滑道上一点,已知小球沿滑道滑至P点时其速度与水平方向的夹角为45°,下列说法正确的是(   )