For which type of connection should a straight-through cable be used?（） [" switch to switch"," switch to hub"," switch to router"," hub to hub"," router to PC"]
《清明上河图》反映了（）。 ["汴河两岸的自然风光","东京城市的繁华景象","清明时节的民间风俗","运河汴河的漕运繁忙"]
尿路感染最常见的致病菌是：（） ["大肠杆菌","葡萄球菌","厌氧菌","支原体衣原体","病毒"]
何谓静电屏蔽？
盛唐画风的代表人物是（）。 ["A、吴道子 ","B、阁立本 ","C、韩滉 ","D、王维"]
简述信用风险的成因。
