物体做匀速圆周运动，下列说法正确的是[ ] A.在相等的时间内转过的弧长相等 B

家庭电路中的保险丝断了，下列原因中可能是 [ ]

A．插座中两根线头相碰

B．电路中接入功率过大的用电器

C．安装用电器的电线太粗

D．开关接触不良

公安机关要特别注意针对销毁活动中的重点公共安全风险，组织开展监督和保障工作。

Advances in surveillance technology could seriously damage individual privacy unless drastic measures are taken to protect personal data, scientists have said. Richard Thomas, the Information Commissioner, gave warning last year that Britain was "sleepwalking" into a surveillance society. Yesterday the country’s leading engineers developed the theme, fleshing out a dystopian vision that not even George Orwell could have predicted.
They said that travel passes, supermarket loyalty cards and mobile phones could be used to track individuals’ every move. They also predicted that CCTV (close-circuit television) footage could become available for public consumption and that terrorists could hijack the biometric chips in passports and rig them up as a trigger for explosives.
The report by the Royal Academy of Engineering, Dilemmas of Privacy and Surveillance-Challenges of Technological Change, argues that the scientists developing surveillance technology should also think about measures to protect privacy. "Just as security features have been incorporated into car design, privacy-protecting features should be incorporated into the design of products and services that rely on divulging personal information," the report says.
"There is a choice between a Big Brother world where individual privacy is almost extinct and a world where the data are kept by individual organizations or services and kept secret and secure." The report says that shoppers should be allowed to buy goods and services without revealing their identities to the companies that provide them. It argues that travel and supermarket loyalty cards and mobile phones are mines of personal information that should be closely scrutinized to make sure that data is not abused.
Professor Nigel Gilbert, chairman of the report group, said. "In most cases, supermarket loyalty cards will have your name on. Why What is needed in a loyalty card is for the supermarket to know what has been bought so you can get your discounts. "
"Does it need to identify you No, it just needs authentication that you’ve bought the goods. It is the same for Oyster cards on the Tube, some of which you have to register for. These are all apparently small things but people are being required to give away more identification information than is required."
Ian Forbes, the report’s coauthor, said that because footage from CCTV cameras could be digitized and potentially stored for ever, that necessitated greater scrutiny of the controlling networks. Britain has about five million CCTV cameras, one for every 12 people.
The report says: "Give this potential, it cannot be guaranteed that surveillance images will remain private, or will not be altered, misused or manipulated. " The report also gives warning that biometric passports and identity cards would give fresh opportunities to fraudsters and terrorists to read remotely the data chips that they contain. It says that it could be possible to rig a bomb to go off in the presence of a certain person or someone of a particular nationality.
The report proposes that the Information Commissioner should be given extended powers, and that stiffer penalties, including prison sentences, should be introduced for those who misuse personal data. The Commons Home Affairs Select Committee is expected to announce an inquiry into the growing use of surveillance.

George Orwell is mentioned in the passage because ______.

A．he was the one who coined the expression "Big Brother"

B．he was a famous British novelist in the 20th century

C．he described a world where individual privacy is denied

D．he conducted the investigation of the damage done to individual privacy

人们都说目前已经进入信息社会、知识经济时代。为适应时代的要求，社会各界的学习欲望普遍高涨，企业也在极力地想将自己改造成为学习型组织。一位学者在北方某城市开展的大样本问卷调查结果却显示出这样的结论：企业总经理的受教育程度与企业的经营绩效之间呈现显著的负相关关系。为什么会这样，有人尝试给出了以下四种解释，你认为哪一种更为科学( )

A．理论与实践有差距，受教育水平的高低并不代表管理能力的强弱，所以受教育程度与企业经营业绩无关。

B．我国目前市场竞争缺乏规范，谁胆大谁赚钱，严密的决策分析不但不会把握住瞬息万变的市场机会，反而会因遵循僵化的教条而丧失市场机会。我国需要敢于冒险的创业家，不需要职业经理群体。

C．目前企业总经理受教育程度普遍偏低，受教育程度高的总经理比例很小，从统计学的原理看，自然应该得到这样的统计结果。

D．可能有很多原因，但首要的原因是市场竞争机制不规范。

购置一个天平，欲用于称量1g左右的样品，称量所用的容器一般为几十克，要求称准至0.0002g，则应选购下列哪种天平（）。

A.最大载荷100g，分度至0.1g的天平

B.最大载荷100g，分度至0.1mg的天平

C.最大载荷100g，分度至0.01mg的天平

D.选择B和C都是合理的