全面贯彻落实科学发展观，必须大力提高自主创新能力，把科技进步和创新作为经济创新型国家和人力资源强国。我国大力推进科技创行是因为（　　）

①科学技术是第一生产力，科技创新是一个国家的生命和灵魂

②科学技术是综合国力的重要基础，科技创新能增强国家实力

③实施创新驱动发展，把科技创新摆在国家发展全局的核心位置

④国际关系是变化发展的，科技竞争是国际关系的重要内容之一。

读一读，回答下列问题。
    Betty is very happy because she moves to her new home today. Her new home is very big and nice. It has three bedrooms. The big one is for her parents. The small one is for her brother Paul and the middle one is for her. Betty likes pink，so her bedroom is a pink room. The walls are pink. The curtains(窗帘)are pink. The bed and wardrobe(衣柜)are pink, too. Every day, Betty does her homework in her bedroom. Betty's father likes the new home, too. He likes the study because it's quiet. He can read in it. Betty's mum likes the kitchen. It is big and clean. She can cook nice food for the family. Paul likes the new home because the living room is so big and he can play games with his friends there.

（﹣1）²⁰¹⁵的值是（　　）

To make members of a team perform better, the trainer first of all has to know their ___and weaknesses.

如图所示的装置中，当开关S闭合后，下列判断正确的是（   ）