Which three restrictions apply to OSPF stub areas？ （） [" No virtual links are allowed."," The area cannot be a backbone area."," Redistribution is not allowed unless the packet is changed to a type 7 packet."," The area has no more than 10 routers."," No autonomous system border routers are allowed."," Interarea routes are suppressed."]
制作胶原蛋白肠衣之主要原料为（）。 ["猪毛","猪瘦肉","猪脂肪","猪皮"]
全网交换机启用了vtp mode client， 问修改其中的一台交换机的vtp domain name会有什么影响？
运动前应做好准备活动，其中一般性准备活动主要是（） ["全身性身体练习","专门性身体练习","局部性身体练习","大强度身体练习"]
创业资本
静电放电的类型有哪些？
