人们经常用____ 、____ 、____ 等来描述天气．天气是一个地区____ 里的大气状况，它是____ 变化的．

(只)

根据上下文意思，用所给单词的恰当形式完成下列短文。

        Toby came back from England yesterday. Two months ago, Toby and his classmate____(enter) a robot competition for his school. More than one hundred  ____(school) around the country joined in it, and Toby's school____(win) the first prize. As captain of his team, Toby felt very proud. He said it was a wonderful experience. But the prize sounded more fantastic. It was a holiday in England. “When the plane took off, I still  ____(do) think it was real. It was like a dream." Toby said. Someone told Toby that the first prize of the robot competition next time____(be) a holiday in America. Toby hoped to enter it then.

已知x=﹣2015，计算|x²+2014x+1|+|x²+2016x﹣1|的值为（　　）

下图是中国近现代四种经济形式的发展走势示意图，其中1所代表的经济形式是（    ）