寡头垄断市场上的价格，通常表现为由（）所决定。
A.市场确定
B.行业确定
C.政府确定
D.各寡头相互协调的行为方式
参考答案：D
Because Web servers are platform and application (17) ，they can send or request data from legacy or external application including database．All replies，once converted into (18) mark up language，can then be transmitted to a (19) ．Used in this way，Intranets can (20) lower desktop support costs，easy links with legacy application and databases and， (21) all。ease of use．
A．ciphertext B．hypertext C．plaintext D．supertext
