string(328) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E5%86%8C%E5%AE%89%E5%85%A8%E5%B7%A5%E7%A8%8B%E5%B8%88%E5%AE%89%E5%85%A8%E7%94%9F%E4%BA%A7%E6%8A%80%E6%9C%AF%E7%9C%9F%E9%A2%98%E5%8F%8A%E7%AD%94%E6%A1%88 => Failed to connect to 218.78.59.96 port 38043: Connection refused"
注册安全工程师安全生产技术真题及答案
