● 下面选项中，不属于HTTP客户端的是 （70） 。

● Windows provides a user-friendly graphical （71） including pop-up menus, scrollbars, dialogue boxes, icons and etc.

● Bitmap images use a grid of small squares known as （72） to represent images.

● With （73） you can communicate in real time with people all around the world.

● Office （74） is the application of the computer and communications technology to improve the productivity of office workers.

● （75） means the conducting of business communication and transaction over network and through computers.