目前船上使用比较普遍的一种救助艇是（）。 A.刚性救助艇 B.充气式救助艇

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To tweet, or not to tweet?
A guide to the social networking/ microblogging service Tewitter
SINCE its creation in 2006, Twitter, the social networking service, has taken cyber space by storm. At first glance it might seem like Facebook, but Twitter is in a league of its own, connecting people with fast-paced updates. It has become a place for activities, celebrities, businesses and everyday people to let others know about videos, opinions, interesting news, advertisements-and, yes what they are eating for lunch.
Twitter: n. a free social networking service that connects users through fast-paced status updates.
Twitter-er: n. one who uses Twitter.
Tweet: n. short updates or messages, of 140 characters or less, wh ich are posted on your profile and sent to your followers.
Retweet (RT): n. unofficial Twitter feature that indicates a re-posting of a tweet from another user. Often uses the text RT@username (of the original source) before the post.
Follower: n. one who receives another user’s updates on his or her Twitter profile.
Direct message: n. a private message sent from one Twitter-er to another.
The phenomenon includes a host of new vocabulary terms and concepts that every self-respecting Twitter-er should know. Here’s a quick course on Twitter.
So you’ve finally been swept up by the techno-tide and gotten a Twitter account. But what to write? Who knew 140 characters could be so overwhelming?
Darren Rowse of the TwiTip blog(www.twitip.com) recommends a two- step tweeting process: figure out what your follows want, and then give it to them. Some combination of cool links, conversation- starting quotes or questions , retweets and photos works well, Rowse writes.
Keep in mind that Twitter doesn’t directly offer photo hosting. You will need to use a third-party site like TwitPic (www.twitip.com) to upload your photos. Other sites, like TwitVid (tweetdeck.com/beta) can be used to post videos.
If you th ink the Twitter Web Site too complicated, try a Twiiter client—Tweetdeck(tweetdeck. Com/beta) and the Mac-only Tweetie(www. stebits. com)are popular, and both also are available as iPhone apps(应用程序).
Even without an iphone, you can update you Twitter on the go. After adding your phone number to your Twitter account, you can text updates to 40404(check Twitter’s Web site for numbers to use outside the United States)
But no matter how you tweet, remember that people can see what you post, and Twitter might not be the best place to complain about your boss, even if you make your Twitter private, your followers may not share your sense of discretion.
Twitter is crowded with celebrith accounts. The famous , who once avoided the media in their private lives, are posting everything on Twitter for all the cyber world to see, gathering followers in the millions. Who’s leading the celebrity pack? TwitterCounter(www.twittercounter.com), a site that tracks the most popular Twitter users, lists Ashton Kuntcher and former fashion model, as the nost popular Twitter-er with, as of our publication date, 2,691,112 followers.
Title: To tweet, or not to tweet?

Introductionto Twitter	(71)     in 2006, twitter, the soclal networking service, has enjoyed(72)    among the cyber world.
Basic Twitter(73)	●twitter ●twitter-er ●tweet ●retwwet
(74)     to tweet your tweets	●Follow a two-step tweeting process, according to the (75)    of Darren Rowse. ●Use a third-party site to upload your photos and post videos. ●Try Twitter clients to help you (76)   Twitter, among which the Tweet-deck and the Mac-only Tweetie are well (77)    . ●Add your phone number to your Twitter account if you don’t have an iPhone. ●Be(78)   of what you post even if your twitter is made private
Celebrity twitter-ers	Celebrties now are (79)    about tweeting, among whom Ashton Kutcher is the most popular, (80)    by the largest number of twitter users.