在一条数轴上有A、B两点，点A表示数﹣4，点B表示数6，点P是该数轴上的一个动点（不与A、B重合）表示数x．点M、N分别是线段AP、BP的中点

（1）如果点P在线段AB上，则点M表示的数是____，则点N表示的数是____（用含x的代数式表示），并计算线段MN的长；

（2）如果点P在点B右侧，请你计算线段MN的长____．

阅读下面的连环画，完成下题。

根据短文内容，从A、B、C、D四个选项中选出一个能填入相应空格内的最佳答案。

    There is an old saying: “Take the time to stop and smell the flowers.” I think we should also take the time to 1 flowers.

    My grandmother knew just 2 to do that. She grew flowers with earth, water and love, so her back garden was filled with beautiful flowers. She would smile when she saw the 3 shine down on them. In her front garden she planted flowers, 4. You could see red, white, and yellow flowers in it. My mom and I used to walk 5 them and enjoy their smells. Beautiful butterflies (蝴蝶) flew down on them. Grandma also cared for the wild flowers. She would send 6and my brother out to pick flowers and would then turn them into delicious wine (酒).

    Grandma not only planted flowers in the gardens 7 also planted flowers in our hearts. Her delicious dinners made with love encouraged us. Her sweet smile always made us 8. Her hugs (拥抱) and kisses were the sunshine that kept our own love 9 day after day.

    Take the time to plant a few flowers yourself today. Show your smiles, kindness and love. Plant your wishes, talents and pleasure. Make this 10 brighter and brighter with your sunshine.

如图所示，质量为m的小滑块，由静止开始从倾角为θ的固定光滑斜面顶端A滑至底端B，A点距离水平地面的高度为h，则小滑块到达B点时重力的瞬时功率为____，小滑块从顶端A滑至底端B这个过程中重力的平均功率为____．