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GenAI习题可视化:2026云南高考第9题A、C、D理论推导很容易，用课件模拟结果非常清晰。对于B选项：由课件模拟可得，不管初速度如何，抛出点高度如何，达到最大射程时，都是初速度和末速度夹角为90°。原题初始条件为平抛，因此初、末速度夹角必小于90°，因此，随着初速度抛出角增大，射程会逐渐达到最大，必然会出界！B选项直接秒。前面证明中，用矢量三角形法已经对此进行证明，方法非常巧妙！因此可以记住这个二级结论：
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夜雨聆风
