如下图甲所示，质量为m=1kg的物体置于倾角为θ=37°固定斜面上，对物体施以平行于斜面向上的拉力F，t₁=1s时撤去拉力，物体运动的部分v-t图像如图乙。

试求：

拉力F的平均功率.

根据首字母和汉语提示完成单词。

1.That musician has w______  many songs?

2.—Has your father been a______?

   —Yes, he has been to many countries.?

3. Zhang Ziyi is very famous.He Meifeng has always wanted to m______her?

4. How many tickets can you buy if they are all s______  out?

5. Wei Ming's father is an Air China captain, so he has f______  to many different countries.