SPECIAL EVENTS THIS WEEKEND

    Captain Good Fellow

    Do your children enjoy interesting stories, funny games, and exciting dances? Captain Good Fellow will be ready to teach all these things to children of all ages at the City Theatre on Saturday morning at 10:00, Free.

    Walking Tour of the Town

    Forget your worries on Saturday morning. Take a beautiful walk and learn about local history. Meet at the front entrance of City Hall at 9:30. Wear comfortable shoes!

    Films at the Museum

    Two European films will be shown Saturday afternoon at the Museum Theatre. See Broken Window at 1:30. The workers will be at 3:45. For further information, call 4987898.

    International Picnic

    Are you tired of eating the same food every day? Come to Central Park on Saturday and enjoy food from all over the world. Delicious and not expensive. Noon to 5:00 pm.

    Take Me out to the Ballgame

    It's October, and tonight is your last chance to see the Redbirds this year. Get your tickets at the gate. It might be cold；don't forget sweaters and jackets.

Do You Want to Hear “The Zoo”

     “The Zoo”, a popular rock group from Australia, will give their first US concert tomorrow night at 8:00 at Rose Hall, City College.

①函数f（x）的图象一定关于某条直线对称；

②函数f（x）在R上是周期函数；

③函数f（x）的最大值为 $\frac{1}{4}$ ；

④对任意两个不相等的实数 $x_1,x_2\in \left(0,\frac{3}{2}\right)$ ，都有 $\frac{f\left(x_1\right)-f\left(x_2\right)}{x_1-x_2}>\frac{1}{10}$ 成立．

其中所有真命题的序号是____．

我国陆续发射多颗北斗导航卫星；“神舟11号”与“天宫2号”成功对接；“蛟龙号”潜水器下潜7000米；我国航母进行多次出海试航；经济保持平稳增长……所有这些成就进一步说明（    ）

①我国经济发展充满活力                                                                               ②我国科学技术迅速发展  

③我国经济和社会正发生着翻天覆地的变化，充分展示了中国的魅力   ④我国的国家实力不断增强