一名小学生的年龄和身高（单位：cm）的数据如下表：

由散点图可知，身高y与年龄x之间的线性回归方程为$\stackrel{\wedge }{y}$=8.8x+$\stackrel{\wedge }{a}$，预测该学生10岁时的身高为（　　）

一物体在光滑水平面上运动，它在相互垂直的x方向和y方向上的两个分运动的速度﹣时间图象如图所示．

（2015·茂名）阅读下面文章，根据文章内容，从每小题所给出的A、 B、 C、 D四个选项中选出最佳答案

One morning, Mr Black was driving in the country and looking for a small hotel. When he saw an old woman on the side of the road, he stopped his car and said to the old woman, “I want to go to the Sun Hotel. Do you know it?”

“Yes,” the old woman said,“I will show you the way.” She got into Mr Black’s car and they drove about twelve miles. When they came to a small house, the old woman said, “stop here!” Mr, Black stopped and looked at the house.“But this isn’t a hotel.” He said to the old woman.

“No”the old woman answered, “This is my house. And I'll show you the way to the hotel. Turn round and go back nine miles. Then you’ll see the hotel.”