如图所示，在风力发电机的叶片上有A、B、C三点，其中A、C在叶片的端点，B在叶片的中点．当叶片转动时，这三点（   ）

【生活在法治国家里】

材料一：“打虎”“拍蝇”“猎狐”齐发力，周永康、徐才厚、令计划、苏荣等“大老虎”接连被查处。全国超7万名违反八项规定党员干部受处理，海外追逃500多人，追赃30多亿元……2014年反腐“成绩单”产生了强大震慑力。

材料二：2012年11月，中共十八大提出了“全面推进依法治国。法治是治国理政的基本方式”；2013年11月，中共十八届三中全会又提出了“坚持法治国家、法治政府、法治社会一体建设”；2014年10月，中共十八届四中全会研究了“全面推进依法治国若干重大问题”．

阅读上述材料，回答下列问题。

A

    On a very sunny afternoon this summer, Laura was driving home. When she was near a crossing, Laura found one of the traffic lights didn't work. And a policeman was standing in the middle of the crossing. There were too many cars. And the weather was too hot. The fact was that he was doing a hard job. He was busying directing(指挥) traffic.

    Laura saw a store on the corner. She wanted to buy some water for the policeman. But it was a little shy of her to do it for a stranger. At last Laura decided to go to the store to buy some water. After buying water, she found it was not easy to give the water to the policeman in the busy crossing.

    But Laura still wanted to have a try. She drove into the crossing and gave him the water. Though he was too busy to take the water, he broke into a smile and said, "Thank you."

    Laura went home by car and felt better. It felt good to spread the positive energy(正能量), and it was the least she could do.

根据短文内容，判断下列句子正误。