连带责任共同保证人的追索权
黄宗羲和顾炎武思想的共同点是都（）。 ["反对重农抑商","强调“经世致用”的实际学问","反对君主专制制度","主张政治上要“趋时更新&rdquo"]
What are two step needed to define a QoS policy for a traffic class？（） ["determine a minimum bandwidth guarantee","determine interfaces to which to apply policy","assign priorities to the class","configure access control list"]
举例说明水文现象？
纯粹型传染
波及型传染
