人体的呼吸系统是由多个器官所组成，其中执行吸入空气与排出二氧化碳交换功能的器官是（）。
A、鼻、哂、喉
B、气管、支气管
C、肺
参考答案：C
甲状腺危象的典型临床表现是
A．心率加快、血压升高、头晕、头痛
B．心悸、气促、呕吐、腹泻
C．心率>160次/分，体温>39℃，呕吐、腹泻
D．心悸、出汗、发绀、呼吸困难
E．面色苍白、四肢发冷、呼吸困难
完成句子。
1. If I were you, _____.
2. If we had more time, _____.
3. If I didn't know the meaning of the text, _____.
4. If I were a bird, _____.
5. If I had a better memory, _____.
