单项选择题
| A webcam is a digital camera that sends video images
to other computer users． It’s about the (26) of a pool ball
and typically (27) on top of your computer monitor．Once the
webcam is (28) to the USB port of your computer with the
necessary software， (29) images of you can be sent to one or
more users over the Internet (30) an instant messaging
(IM)service． A webcam costs about $50．More expensive models come with added (31) , such as better picture resolution．TWo leading makers，Logitech and Creative, offer a range of models, (32) software is included．There is no extra Internet (33) to send or receive video images, though you’ll have to (34) for a flee instant messaging service．Everyone can see and hear one another in (35) time．Grandparents can see their grandkids more (36) ．Webcams can work with almost any computer bought in the past five years and can (37) long distance phone bills． (38) you have broadband, that is, a high-speed cable-modem or DSL connection, images may (39) a long time to download， (40) a slide show rather than a movie．While webcams are easy to link to your computer, learning to (41) the software can take time．You have to make some rearrangement with the configurations． (42) you have a 56k modem and the people you want to (43) won’t mind seeing live shots instead of perfect video, a webcam is still fun． (44) before you buy, be sure everyone (45) for the same IM service． |