HttpWebRequest and HtmlWeb:发送请求
HtmlAgilityPack:加载网页
Xpath:语法取值
Parallel.ForEach:多线程并发
WebProxy:代理IP
微博地址:'https://s.weibo.com/user?Refer=weibo_user&q='
Xpath://*[@id='pl_user_feedList']/div[1]/div[2]/p[3]/span[2]/a
360搜索地址:https://www.so.com/s?q=
Xpath://*[@id='page']/span
360咨询搜索地址:https://news.so.com/ns?q=
Xpath://*[@id='filter']/div[1]
搜狗搜索地址:https://www.sogou.com/web?query=
Xpath://*[@id='main']/div[1]/p
搜狗新闻搜索地址:https://news.sogou.com/news?query=
Xpath://*[@id='wrapper']/div[1]/span[1]
百度搜索地址:https://www.baidu.com/s?wd=
Xpath://*[@id='container']/div[2]/div/div[2]/span
百度咨询搜索地址:https://www.baidu.com/s?&word=
Xpath://*[@id='container']/div[2]/div/div[2]/span
百度百科搜索地址:https://baike.baidu.com/item/
Xpath:/html/body/div[3]/div[2]/div/div[3]/dl/dd[1]/ul/li[2]