喉软骨有哪些？
参考答案：
有甲状软骨、会厌软骨、环状软骨、杓状软骨。
It's no use ____ to persuade him to get rid of that habit; he can't make ____. [ ]
A. trying, it
B. to try; it
C. trying; that
D. to try; that
因特网又称互联网，近期内它在城市规划中的典型作用不包括( )。
A．信息发布B．数据与设备资源共享C．城市工业生产分析D．分散而协同地工作
