Intermediate system to intermediate system (IS - IS), is a protocol used by network devices (routers) to determine the best way to forward datagrams through a packet - switched network, a process called routing. Which three attributes are of the IS - IS routing protocol? （） [" supports VLSM"," link - state routing protocol"," operati on is similar to BGP"," supports two routing levels within an autonomous system"]
高层建筑管道施工中，铜管连接当管径大于或等于2mm时宜采用（） ["A.对口焊接 ","B.专用接头 ","C.热熔连接 ","D.套管焊接"]
邓小平关于中国的总体设计中包括一条基本路线、三个奋斗阶段、一个和平发展大战略。其中一个奋斗目标是指（）。 ["建设社会主义现代化国家","建设社会主义现代化强国","建设社会主义现代化富国","建设社会主义现代化大国"]
种群
水粉画颜料中所有的红色颜料、鲜蓝、青莲和黑都具有较强的泛色性。
简述生物标志物及其分类。
