树立远大的理想，还要有具体的行动计划。制定学习计划（）
①要符合老师、家长的要求  ②要尽量和大家一样
③要体现自己的个性、特点  ④要留有一定的余地 

    Everyone needs friends. We all like to feel close to someone. It is nice to have a friend to talk, laugh and do many things with. Sure, there are times when we need to be alone. We don't always want people around. But we would feel lonely if we never had a friend.

    No two people are the same. Sometimes friends don't get along well. That doesn't mean they no longer like each other. Most of the time, they will go on being friends. Sometimes friends move away. Then we feel very sad. We miss them very much. But we can call them and write to them. Maybe we would never see them again. And we can make new friends. It is surprising to find out how much we like new people when we get to know them. Families sometimes name their children after a close friend. Many places are named after men and women, if they are friendly to people in a town. Some libraries are named in this way. So are some schools. We think of these people when we go to these places.

    There is more good news for people, if they have friends. These people live longer than those people who do not have friends. Why? It could be that they are happier. Being happy helps you stay well. Or it could be just knowing that someone cares. If someone cares about you, you take better care of yourself.

下列说法有错误的一项是(    )

某同学在某砖墙前的高处水平抛出一石子，石子在空中运动的部分轨迹照片如图所示．从照片可看出石子恰好垂直打在一倾角为37°的斜坡上的A点．已知每块砖的平均厚度为10cm，抛出点到A点竖直方向刚好相距200块砖，取g=10m/s²．（Sin37°=0.6  cos37°=0.8 ）求：