WAP uses (1) which includes the Handheld Device Markup Language (HDML) developed by Phone.com. WML can also trace its roots to eXtensible Markup Language (XML). A markup language is a way of adding information to your (2) that tells the device receiving the content what to do with it. The best known markup language is Hypertext Markup Language. (3) HTML, WML is considered a meta language. Basically, this means that in addition to providing predefined (4) , WML lets you design your own markup language (5) . WAP also allows the use of standard Internet protocols such as UDP, IP and XML.

3（）

A．Usable

B．Able

C．Unlike

D．Like

湿地的生命力是可以被一点一滴看见的。我最先看见的是湿地上的青蛙，它_______地弹跳，让寂静的湿地有了动感;青蛙落脚的地方，黑颈鹤_______，动作像骄傲的体操运动员那样自由、舒展;接下来，三三两两的羊像无声的云从村子里飘过来，它们身后是牦牛家族，带着高海拔的困倦与_______;再后来，高原上真正的主角——放牧者出现了，他们被牦牛这些群众演员簇拥着，压轴出场。

A．猝不及防 腾空跃起 慵懒

B．始料不及 悠然自得 疲惫

C．出其不意 翩翩起舞 懒惰

D．突如其来 昂首阔步 疲倦