小明同学有一从玩具小汽车里拆下来的电动机，他想提高电动机的转速（假设电动机不损坏），他可以采取的方法有____，____．（请写出两种方法）

听下面一段对话，回答小题。

根据短文内容，选择正确答案。
A
    One day, Mr. and Mrs. White went shopping by car. They stopped their car near a store. They bought a lot of things and they wanted to put them in their car. But Mr. White couldn't open the door of the car. “Let's ask a policeman for help.” said Mrs. White. They asked a policeman to help them. The policeman was very friendly to help them open the door of the car. Just then a man came up and shouted, “What are you doing with my car?” Mr. and Mrs. White took a look at the number of the car. It was not their car.

专门保护未成年人权益的两部法律是 (　　)

春秋战国时期，主张“明礼仪以化之，起法正以治之，重刑法以禁之，使天下皆出于治，合于善也”的思想家是（   ）