（1）考古人员在发掘出来的文物中，发现金手镯完好无损，铜镜面有少量钢锈，铁器表面则锈迹斑斑．根据以上现象，你能得到的结论是 ____．

（2）铁器生锈是铁与____共同作用的结构，写出防止铁制品生锈的一种方法 ____．

（3）请你设计一个实验方案，比较铝、铁、铜的金属活动性强弱 ____．

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    If you like reading fairy tales(童话故事), do not miss the book The Miraculous Journey of Edward Tulane(《爱德华的奇妙之旅》).It is a famous story by an American writer Kate Dicamilo in 2006．People, the young and the old, love this book. And it's so popular that it is one of the " “Top100Books for Children” in the US.

    The story is about a journey of a china rabbit (瓷兔子) called Edward. He lives with his

    ten-year-old owner (主人) named Abilene. Abilene loves him very much but Edward doesn't love her. During a holiday on a ship, Edward is lost. After spending 297 days in the sea, he reaches abeach and a man takes him home .Then Edward travels from one place to another, meeting manypeople. His name keeps changing, such as Susie and Maloney. Soon he begins to miss Abilene andwait for her. One day Edward falls into pieces. Someone repairs (修理)it and sells it in the market.

    Many years later, Abilene and her daughter come to the market and take Edward home. Finally

    Edward is with his owner again.

    There are many pictures in the book, so we can follow Edward's journey easily.

    You can learn that Edward learns love and never stops waiting for Abilene .This is why theymeet each other at the end of the story. The warm and sweet story will make you know more aboutlove．

如图所示，地球绕着太阳公转，而月球又绕着地球转动，他们的运动均可近似看成匀速圆周运动．如果要通过观测求得地球的质量，需要测量下列哪些量（   ）

则可以说其亲属的饮食习惯与年龄有关的把握为（   ）

附：参考公式和临界值表K²= $\frac{n{\left(ad-bc\right)}^2}{\left(a+b\right)\left(c+d\right)\left(a+c\right)\left(b+d\right)}$

文艺创作的正确导向是聚焦中国梦时代主题，以中华优秀传统文化为根脉，以创新为动力，大力弘扬社会主义核心价值观，唱响爱国主义主旋律，持续开展“深入生活、扎根人民”主题实践活动，建立健全长效机制。这就要求我国文艺创作者（    ）

①必须将弘扬和培育民族精神与弘扬时代精神紧密结合起来

②立足于中国特色社会主义建设，植根于中华民族的文化土壤

③永远高扬爱国主义的旗帜，因为爱国主义贯穿民族精神的各个方面

④要以传统文化为根脉，因为传统文化有强大的生命力、创造力