Many people think if you turn off your TV, your life will be colorful. They also suggest children should watch less TV. TV can give children big problems. First, it's bad for your studies, you spend too long on TV. You can't do well in school. Second, it's bad for your health. Because you watch too much TV, you are getting overweight and your eyesight is getting worse. Third, it's bad for your family life. While your families are watching TV, they don't talk too much. Also it has too much fighting. Some children always follow the fighting in real life.

    If you turn off your TV for a week, maybe you can find something fun to do. Maybe you can read books, learn to swim or paint pictures. What do you think? Would you want to have a try?

成都和拉萨气温日较差差异较大的根本原因是纬度差异较大．（判断对错）

如图，△ABC中，AB=AC，DE垂直平分AB，BE⊥AC，AF⊥BC，则下面结论错误的是（　　）