看偏旁写字。

口：____  ____  ____

彳：____  ____  ____

如图，在直径AB＝12的⊙O中，弦CD⊥AB于M，且M是半径OB的中点，则弦CD的长是（    ）
  

    Ann is my classmate. She comes from New York, and she lives in Shanghai with her parents now. Every morning, she goes to KFC to have breakfast. Sometimes she buys a hamburger for me. She can't speak Chinese well. In the evening, her father often helps her with it. He's a teacher in our school. He can speak Chinese very well.

    Ann thinks the school life(生活)in China is very interesting. Ann likes reading Chinese books because she wants to know more about China. She tries(努力)to talk with her Chinese friends in Chinese. She hopes to speak Chinese well. She is very happy to live in China. She loves people here.

澳大利亚的首都是（　　）

禽流感传播的渠道有（   ）