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更多“An important advance in the philosophy of NC of machine tools was the shift toward the use of contro…”相关的问题
| Tom said they ________ the tomb of everything it contained before he found it. |
[ ] |
| A．have emptied B．emptied C．had emptied D．empty |
Nonetheless, many companies still hesitate to use the Web because of doubts about its reliability. "Businesses need to feel they can trust the pathway between them and the supplier," says senior analyst Blanc Erwin of Forrester Research. Some companies are limiting the risk by conducting online transactions only with established business partners who are given access to the company's private intranet.
Another major shift in the model for Internet commerce concerns the technology available for marketing. Until recently, Internet marketing activities have focused on strategies to "pull" customers into sites. In the past year, however, software companies have developed tools that allow companies to "push" information directly out to consumers, transmitting marketing messages directly to targeted customers. Most notably, the Pointcast Network uses a screen saver to deliver a continually updated stream of news and advertisements to subscribers' computer monitors. Subscribers can customize the information they want to receive and proceed directly to a company's Web site. Companies such as Virtual Vineyards are already starting to use similar technologies to push messages to customers about special sales, product offering, or other events. But push technology has earned the contempt of many Web users. Online culture thinks highly of the notion that the information flowing onto the screen comes there by specific request. Once commer-cial promotion begins to fill the screen uninvited, the distinction between the Web and television fades. That's a prospect that horrifies Net purists.
But it is hardly inevitable that companies on the Web will need to resort to push strategies to make money. The examples of Virtual Vineyards, Amazon.com, and other pioneers show that a Web site selling the right kind of products with the right mix of interactivity, hospitality, and security will attract online customers. And the cost of computing power continues to free fall, which is a good sign for any enterprise setting up shop in silicon. People looking back 5 or 10 years from now may well wonder why so few companies took the online plunge.
What do we learn about the present web business?
A．Web business is no longer in fashion.
B．Business-to-business sales are the trend.
C．Web business is prosperous in the consumer market.
D．Many companies still lack confidence in web business.
A、increases, left
B、increases, right
C、decreases, left
D、decreases, right
It found many youngsters(少年）now measure their status by how much public approval they get online, often through “like”. Some change their behavior. in real life to improve their image on the web.
The report into youngsters aged from 8 to 12 was carried out by Children&39;s Commissioner (专 员）Anne Longfield. She said social media firms were exposing children to major emotional risks, with some youngsters starting secondary school ill-equipped to cope with the tremendous pressure they faced online.
Some social apps were popular among the children even though they supposedly require users to be at least The youngsters admitted planning trips around potential photo-opportunities and then messaging friends—and friends of friends — to demand “likes” for their online posts.
The report found that youngsters felt their friendships could be at risk if they did not respond to social media posts quickly, and around the clock.
Children aged 8 to 10 were "starting to feel happy" when others liked their posts. However, those in the 10 to 12 age group were "concerned with how many people like their posts", suggesting a “need” for social recognition that gets stronger the older they become.
Miss Longfield warned that a generation of children risked growing up "worried about their appearance and image as a result of the unrealistic lifestyles they follow on platforms, and increasingly anxious about switching off due to the constant demands of social media.
She said: "Children are using social media with family and friends and to play games when they are in primary school. But what starts as fun usage of apps turns into tremendous pressure in real social media interaction at secondary school."
As their world expanded. she said, children compared themselves to others online in a way that was "hugely damaging in terms of their self-identity, in terms of their confidence, but also in terms of their ability to develop themselves".
Miss Longfield added: "Then there is this push to connect—if you go offline, will you miss something, will you miss out, will you show that you don&39;t care about those people you are following, all of those come together in a huge way at once."
"For children it is very, very difficult to cope with emotionally." The Children&39;s Commissioner for England&39;s study—life in Likes—found that children as young as 8 were using social media platforms largely for play.
However, the research—involving eight groups of 32 children aged 8 to 12—suggested that as they headed toward their teens, they became increasingly anxious online.
By the time they started secondary school—at age 11—children were already far more aware of their image online and felt under huge pressure to ensure their posts were popular, the report found.
However, they still did not know how to cope with mean-spirited jokes, or the sense of incompetence they might feel if they compared themselves to celebrities(名人）or more brilliant friends online. The report said they also faced pressure to respond to messages at all hours of the day—especially at secondary school when more youngsters have mobile phones.
The Children’s Commissioner said schools and parents must now do more to prepare children for the emotional minefield(雷区）they faced online. And she said social media companies must also "take more responsibility". They should either monitor their websites better so that children do not sign up too early, or they should adjust their websites to the needs of younger users.
Javed Khan, of children&39;s charity Bamardo&39;s, said: "It&39;s vital that new compulsory age- appropriate relationship and sex education lessons in England should help equip children to deal with the growing demands of social media. “
It’s also hugely important for parents to know which apps their children are using.”
Why did some secondary school students feel too much pressure？
A.They were not provided with adequate equipment.
B.They were not well prepared for emotional risks.
C.They were required to give quick responses.
D.They were prevented from using mobile phones.
Some social app companies were to blame because .A.they didn't adequately check their users' registration
B.they organized photo trips to attract more youngsters
C.they encouraged youngsters to post more photos
D.they didn't stop youngsters from staying up late
Children's comparing themselves to others online may lead to .A.less friendliness to each other
B.lower self-identity and confidence
C.an increase in online cheating
D.a stronger desire to stay online
According to Life in Likes, as children grew, they became more anxious to .A.circulate their posts quickly
B.know the qualities of their posts
C.use mobile phones for play
D.get more public approval
What should parents do to solve the problem？A.Communicate more with secondary schools.
B.Urge media companies to create safer apps.
C.Keep track of children's use of social media.
D.Forbid their children from visiting the web.
What does the passage mainly talk about？A.The influence of social media on children.
B.The importance of social media to children.
C.The problem in building a healthy relationship.
D.The measure to reduce risks from social media.
A、program
B、geometry
C、data
D、parameter
A、The depth of cut
B、The cutting speed
C、The feed
D、The spindle
A、NC
B、CNC
C、BNC
D、DNC
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