A common implementation to guarantee message delivery in an asynchronous exchange is to implement a queuing environment 保证在异步交换中进行消息传递的一种常见方法是实现队列环境。
Information technology can satisfy the needs of learning by inquiry fully , because it has such characteristics as a great deal information resources , synchronism asynchronous exchange way , quick feedback and etc . through learning history and analyzing current situation , the writer realizes that learning by inquiry is an educational development theme of our times 信息技术所具有的海量信息资源、同步异步并行的交流方式、反馈的即时性和互动性、充分体现个人主体性等特点,能充分满足研究性学习的需要。