设函数f（x）=sin²（x+ $\frac{\pi }{4}$ ）﹣cos²（x+ $\frac{\pi }{4}$ ）（x∈R），则函数f（x）是（   ）

近年来，服装企业越来越重视品牌建设。2015年7月，我国某服装企业现金收购意大利一家著名服装公司51%的股权，利用其品牌、营销渠道进入国际市场。该收购可以助力企业（    ）

①创新利用外资的方式                   
②改善股权结果和合理结构

③加强国际合作，扩大产品市场      
④丰富品牌组合，满足差别化需求

A

Sharon：Wow, Julie! Your room is great! Is your bed new?

Julie：Yes, it's new. It's from my aunt.

Sharon：Is your desk new? It's big.

Julie：No, it isn't. It is my brother's.He gave it to me.

Sharon：Why do you want a big desk? You don't do your homework in your room. You always do it in the classroom.

Julie：I know, Sharon. But my parents will give me a computer!

Sharon：A computer? Great. Oh, there are many books in your bookcase.

Julie：Yes. I am fond of reading.

Sharon：Where is your baseball?

Julie：I think it's in the desk. Oh, it's not here.

Sharon：Is it under your bed?

Julie：Oh, yes.

根据材料内容选择最佳答案。

讲述中国故事，彰显中国特色，展示中国风格，体现中国气派！党的十八大以来，站在中国与世界的命运交汇点上，中国特色外交全面推进——坚定不移走和平发展道路、致力于打造人类命运共同体、积极推进全球治理体系变革┄ ┄下列能体现中国外交特色的事实有（    ）