关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 公告：维护QQ群：833371870，欢迎加入！公告：维护QQ群：833371870，欢迎加入！公告：维护QQ群：833371870，欢迎加入！ 2021-04-14 即时信息（Instant Messaging，IM） 即时信息（Instant Messaging，IM） 答案： 查看 举一反三 To use instant messaging, you should register with an IM server. In the process of using IM, an instant messaging server will notify you if any of your contacts are online. Instant messaging can be ______ as IM. Instant messaging is a type of ________ service. Instant messaging allows text only.
