本次会议将批准《2017－2021年上合组织进一步推动项目合作的措施清单》，涵盖贸易、投资、海关、农业等7大领域的38项措施，将对上合组织今后5年的务实合作发挥引领作用。材料说明（   ）

①当代国际竞争实质是综合国力的较量　②国际关系健康发展需协调国家间利益　③维护共同利益是我国外交政策的宗旨　④国际关系实质上是一种利益关系

    It was cold yesterday. Tom didn't go out. He did housework. Sam went to play football. And he had a cold. He fell ill today. He's got a fever. Lili phoned him. She will come to see Sam. Sam's mother cooked lunch. They had noodles and eggs for lunch. Sam drank lots of hot water. It's good for him.

﹣ $\sqrt{3}$ 的相反数是____，倒数是____．

有人说:“隋朝,犹如一颗流星划过历史的夜空,时间虽然短暂却光芒四射。”隋朝“光芒四射”的成就包括（     ）

①南北重归统一   ②发明活字印刷术

③开通了大运河   ④制成了曲辕犁

找规律，填一填。