单选题 (66) is a collection of web pages connected together with (67) . Each document or page has a unique address that allows you to find it among the millions of other documents on the Web. The address is called a (68) (URL) or sometimes a Uniform Resource Indicator (URL). When you chose a new link by clicking on it or by typing it into the address field your (69) sends a request for that document and displays it on the screen. That link can be to a different section of the current document, another document on the same website as the original or on another website anywhere in the world. Web pages are designed using (70) or HTML.