I have a good friend at home. Her name is Mimi. She is white and yellow. She is very cute. I play with her when(当……的时候) I have time. She likes fish very much. When she is behind (在……之后) the sofa or in her box, you can’t see her. When I sit on the sofa, she sits with me. In the evening I do my homework at my desk, and she is on the desk. At that time I put her down(放下). Then she sits next to me. Is she a good friend of mine?

盒子里有大小相同的2个红球和1个篮球，从中任意摸出2个球，则摸到1红1蓝的可能性大还是摸到2红的可能性大？（   ）

关于机械能守恒，下列说法正确的是（   ）

“家庭是一个人终身学习的学校，不仅年幼受家庭教育，而且人人都要受家庭文化的影响。”这体现了家庭具有（ ）

修改病句

大家必须讲究卫生的好习惯。