题目

欲用96%的工业酒精制取无水乙醇时，可选用的方法是( ) A．加入无水CuSO4，再过滤 B．加入生石灰，再蒸馏 C．加入浓硫酸，再加热，蒸出乙醇 D．将96%的乙醇溶液直接加热蒸馏 答案：B We all know that it is important to get exercise. But how can we get enough exercise and have fun as well.The answer is: team sports! Team sports are w【1】. When we're playing, our friends will e【2】 us if we are not doing a good job, and there will be friends to give us cool advice on how to play the sports better. Many times, we get to meet and make some new friends!We play team sports for fun and good health. We play team sports to learn about the team spirit. However, some teams try hard to win every game and b【3】 very competitive（竞争激烈的）. If we are on such a team, we will have too much pressure. And we may even get h【4】 if we play too hard.Sometimes it can be hard to find a team that works for us. But we can always start o【5】 by ourselves! Start a team with some of our best friends, finding out what kind of sports we like. It could be swimming, basketball, football, dancing or something else.And while we're playing team sports, we should remember to play s【6】 too! We need to listen to our parents and teachers b【7】 having fun! Safety always comes first.