When triggered, a One-Shot produces a single pulse. 当被触发后，“单稳”会产生一个单脉冲。

unrest such as the riots (暴乱) in England this summer, new research has shown.

A survey of 973 adults carried out for the online security firm Unisys found 70% of adults supported

the shutdown of Twitter, Facebook and BlackBerry Messenger (BBM), while only 27% disagreed.

Three-quarters agreed that governments should have open access to data on social network users in

order to prevent relevant (相应的) crime. Support for action against social networks was strongest

among over-65s and weakest among 18 to 24-year-olds, who are the heaviest users of the online

services.

Several people were accused of attempting to start disturbances (骚动) using Facebook during the

outbreak of rioting across England in August. The court recently refused a request o lower the sentences

of two people sent to prison for four years for attempting to arrange riots on the social media site, despite

them not leading to any disturbances.

Analysis bythe Guardianfound little evidence to support claims the network had been used to set

off unrest. However, the BBM network was believed to have played a role in organizing disturbances.

It's very worrying that people would believe shutting down social networks would be worth. The vast

majority of social network use during the unrest was people spreading information and helping each other

get home safely. These kinds of actions would weaken the UK's position against authoritarian regimes (独裁政权). As we live more of our lives online, people should be conscious of the amount of power they're probably handing over to government.

Jonathan Polanyi, a lawyer in criminal law and member of the Bar Council's IT Committee, said

developments across 2011 suggested the UK's legal system was failing to keep pace with technological

change.

"We've seen discussions about libel (诽谤) and super-forbidden on Twitter; the use of social

networking to coordinate civil unrest in UK cities and a series of high profile attacks on well-known

companies which have led to loss of data," he said. "It is important that the law quickly develops to deal

with issues related to new technology."

B. An 18-year-old boy.

C. A young woman of 24.

D. An old man of 66.

B. attempted to plan riots on the social media site

C. led to some disturbance to the social media site

D. started disturbances using Facebook and Twitter

B. the BBM network organized disturbances

C. shutting down social networks would be desirable

D. 70% of adults supported the shutdown of the network

B. The law associated with new technology should be progressed.

C. Twitter has led to loss of data and should be accused.

D. Some well-known companies were attacked by Twitter.