Have you ever met with this case in your life________you can't understand others even if they have

said something several times?[ ]

A. where  

B. what  

C. that  

D. which

查找“新型大气激光通信装置”“太阳能路灯的电源系统控制装置”的专利。写出专利号、公开号、主分类号、分类号、申请人姓名（申请人和专利号最重要）