函数y=﹣x²+1的单调递增区间为（　　）

隋唐时期统治者解决“官僚体系内部的权利制衡”问题的重要举措是（    ）

    Mr. Smith is my new friend. He1from Paris, France. He is a French2of a middle school. His students all like3very much. He can speak some Chinese,4not much. He wants to learn more, so he goes to5 classes every week. He likes living and working6China very much. He7 the Chinese people are very friendly(友好的). He has two8, Maria and Tom. They are students, but they go to different(不同的)9. They have some pen pals and they often write10 the pen pals. They also have many Chinese friends at school and they play games after class.