中国智慧，凝聚共识；中国风采，举世瞩目。谈友谊、话文明、论合作、谋发展……***纵论古今、深入浅出的演讲，使“中国热”在欧洲大陆持续升温。***2014年春天的欧洲之行（  ）
①诠释了东方大国的非凡气度和文化自信
②有利于对外展示中国形象提升国际地位
③能够让世界从新的视角观察和认识中国
④有助于加强中国与欧洲国家的交流合作

当k=____时，（1）k $\overrightarrow{a}$ + $\overrightarrow{b}$ 与 $\overrightarrow{a}$ ﹣3 $\overrightarrow{b}$ 垂直；

当k=____时，（2）k $\overrightarrow{a}$ + $\overrightarrow{b}$ 与 $\overrightarrow{a}$ ﹣3 $\overrightarrow{b}$ 平行．

我是翻译小能手（英译汉）

下列物质中，前者是单质，后者是混合物的是（  ）

    We spend hours, days and years of our lives in school. Imagine(想象) you could design(设计) your dream school, what would it be like? What would you be doing? We wanted to find out what teenagers around the world thought. Here is what they said:

    Richard from the USA: My dream school would have a big swimming pool and two soccer fields. It would also have a cinema, a gym and a shopping centre. My school has none of these, and I think there should be more pleasant things for students to do while they are studying.

    Sonia from Italy: I'd like a room where we can relax and play computer games. I'd also like to have a music room. I think there should be a place for everyone to go and relax after class.

    Wu from Beijing: I think it would be great to have another day off (休息日) every week, besides the weekend. If that day was a Friday or a Monday, we would have a long weekend every week. What fun! I also think school should start later, at about 10 o'clock, and finish earlier.

    Hannah from Australia: In my dream school, I think the teachers should give us more freedom(自由) and choice about how we study and what we study. I also think it's not necessary for us to wear school uniforms every day. I really don't like wearing it.