● （73) are essential for the protection of data. （73）A. Memory B. Backups C. Files D. Bloc

essential differences between an ordinary terminal emulator and a Web browser are that the browser knows how to deal with(71), and that it has a mechanism for(72)graphical files. Display text, display graphics, and(73)hyperlinks-there's 99 percent of the(74)value. That's not to say that the manufacturers didn't go all-out to attach a hyperactive efflorescence of useless capabilities onto their browsers. Remember when media channels in the browser were a big deal, instead of the clutter you can't wait to delete from your favorites of bookmarks menu？ Remember when client-side Java applets were supposed to become the preferred(75)for application development？ Remember frames and all their nasty side effects？

(77)

A．superlinks

B．links

C．hyperlinks

D．connections

ssential differences between an ordinary terminal emulator and a Web browser are that the browser knows how to deal with(71), and that it has a mechanism for(72)graphical files. Display text, display graphics, and(73)hyperlinks--there's 99 percent of the(74)value. That's not to say that the manufacturers didn't go all-out to attach a hyperactive efflorescence of useless capabilities onto their browsers. Remember when media channels in the browser were a big deal, instead of the clutter you can't wait to delete from your favorites of bookmarks menu？ Remember when client-side Java applets were supposed to become the preferred(75)for application development？ Remember frames and all their nasty side effects？

A．superlinks

B．links

C．hyperlinks

D．connections

国家基本药物(national essential drug)

A.harbour

B.function

C.definite

D.essential

It is essential that you _______ on time.

A、be

B、are

C、were

D、being

A.connection

B.association

C.terms

D.relations

A.A.competent or capable

B.B.salt is essential for life