限制网速：
方法一；【规则】--【性能设置】--【模拟慢速网络】
方法二【FiddlerScript】
if (m_SimulateModem) {
// Delay sends by 300ms per KB uploaded.oSession "request-trickle-delay"] = "300"// Delay receives by 150ms per KB downloaded.oSession "response-trickle-delay"] = "150";
·模拟网络中断，返回500状态码（以博客园为例）
·【规则】--【自动断点】--【在返回后】
