string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%BB%BA%E6%A8%A1%E6%8B%9F%E8%AF%95%E5%8D%B7%E6%9C%89%E5%BF%85%E8%A6%81%E5%81%9A%E5%90%97 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
一建模拟试卷有必要做吗
