WAP uses (71) , 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 (72) that tells the device receiving the content what to do with it. The best known markup language is Hypertext Markup Language. (73) HTML, WML is considered a meta language. Basically, this means that in addition to providing predefined (74) , WML lets you design your own markup language (75) . WAP also allows the use of standard Internet protocols such as UDP, IP and XML.

A．Usable

B．Able

C．Unlike

D．Like

一项药品行政保护申请，（）。

A.可以用于保护多种药品

B.只限于保护一种药品

C.可以保护2-5种药品

D.可以保护多种特定药品