关于东北地区地理特征的叙述，正确的是（    ）

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.

澳大利亚的动物有什么特点?这些特点是怎样形成的?有哪些特有动物?     

选出不同类的单词。

下列属于先天性行为的是（  ）