材料一：如下图

材料二：改变生产资料私有制为社会主义公有制这个极其复杂和困难的历史任务，现在在我国已经基本完成了。我国社会主义和资本主义谁战胜谁的问题，现在已经解决了。

——刘少奇

一湖面面积是192km²，现在湖面上铺上一层厚度为单个分子直径的单分子薄油层，请估算铺满湖面需要多少体积的油．

2016年9月13日，《中国学生发展核心素养》研究成果在北京发布。“中国学生发展核心素养”的核心是培养（    ）

完形填空。

    Jack is my classmate. He is my good friend. He is 1 American boy. He is from 2. He is short. He has a round face and    3 big brown eyes. His 4 is not black. It is blond (金黄色的). Tom likes English. He can speak a little Chinese, too. He goes to school 5 foot.

    We usually 6 our homework at school. We clean our classroom 7 every Friday. Usually, Tom 8 the blackboard and I sweep the floor. Our favourite sport is basketball. Sometimes we 9 in the playground. We 10 at 4.30. We both like our teachers and classmates.