中央型肺癌
参考答案：中央型肺癌 发生在段支气管至主支气管的肺癌称为中央型肺癌，较多见于鳞状上皮细胞癌和小细胞肺癌。
按要求写句子。
1. What does your aunt do? (同义句)
______________ ______________ your aunt's ______________?
2. They are firemen. (变单数)
________________________________________________________.
3. He wants to be a policeman. (就划线部分提问)
________________________________________________________?
4. Would you like to sing and dance? (同义句)
______________ ______________ to sing ______________ dance?
5. They are my new friends. (就划线部分提问)
