（简答题）简要分析价格变动对经济活动带来哪些影响。

我国的“南大门”是（　　）

在“现代科技给我们带来了什么”的综合性学习中，班级将就“手机的使用”开展探究活动。请你根据这次活动，按要求完成下列问题。

标志着北宋诗文革新运动最高成就的作家是（    ）

阅读短文并选择正确答案。
    Helen is an English schoolgirl. She is now in Nanjing with her parents. She doesn't know Chinese. She often tries to speak Chinese to her Chinese friends. Sometimes they don't understand(理解) her, because she can't speak Chinese well.
    It's a Sunday morning. Helen wants to go to Zhongshan park. She is going there to see a flower show(展览). But she doesn't know how to go there. She asks a Chinese boy. The boy can't understand her. Then she takes out a pen and some paper. She draws a park and some flowers on it and gives the picture to the boy and says something about it. The boy smiles and then shows Helen the way to the park.