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【单选题】

歼10是中国空军历史上最富传奇和神秘色彩的歼击机，机长14.57米、推力122千牛顿、最大速度2.0马赫、最大升限18000米、最大航程2500公里、载弹量7000公斤，那么歼10战斗机加速上升时（　　）

A.
动能逐渐减小，势能逐渐增大，机械能不变
B.
动能逐渐增大，势能逐渐增大，机械能增大
C.
动能逐渐增大，势能逐渐减小，机械能不变
D.
动能逐渐减小，势能逐渐增大，机械能减小
题目标签：最大航程神秘色彩加速上升
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