一个车队共有n（n为正整数）辆小轿车，正以每小时36千米的速度在一条笔直的街道上匀速行驶，行驶时车与车的间隔均为5.4米，甲停在路边等人，他发现该车队从第一辆车的车头到最后一辆的车尾经过自己身边共用了20秒的时间，假设每辆车的车长均为4.87米．

近年来，我国在50多个国家举办了200多个中国文化节、艺术节，已同世界上160多个国家和地区进行了良好的文化交流。这意味着（）
①不同国家的文化能够和谐发展 ②中华文化博大精深，优于其他文化 ③中华文化有其独特的魅力 ④我们尊重文化的多样性和差异性 

在基态多电子原子中，关于核外电子能量的叙述错误的是 （   ）

Dear Diary,

    What a day!I started at my new school this morning and had a great time.I made lots of new friends and really liked my teachers.I was so nervous last night,but I had no reason(原因) to be .Everyone was so friendly.They made me feel at home!

    The day started very early at 7：00am.I had breakfast with my mum.She could tell(看出)that I was very anxious.Mum kept asking me what was wrong. I thought she knew that I was nervous about starting at a new school. She told me I had nothing to worry about and that everyone would be friendly and love me.

    My mum dropped me off(让我下车)at the school gate at about 7：50 am．A little girl with fair hair got dropped off at the same time and started waving at me．She ran over and told me her name was Abigail．It turned out that we were in the same class．Abigail was very nice and we became close right away．We spent all morning together and began to talk with another girl called Stacey．The three of us sat together in class all day and we even made our way home together! Time went by so quickly．Our teacher told us that tomorrow we would really start learning and developing new skills(技能)．

    It is late now so I am going to sleep,but I cannot wait till tomorrow!I believe I'm going to enjoy my time at my new school!I hope that my new friends feel the same too．

Casey

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