下列二次根式中，最简二次根式是（ ） A．a2+1 B．12 C．12 D．a2b

阅读材料，完成下题（12分）

材料一  食品安全是指食品无毒、无害，符合应有的营养要求，对人体健康不造成任何危害。近段时间，各种食品安全“门”事件不断考验着消费者的承受力，这一扇扇门的开启，让消费者对食品安全产生了担忧，人们也不禁发出这样的疑问“今后还有多少门要打开？”有关部门、媒体也对有问题的食品进行集中汇总和曝光，让企业严格遵守国家标准和行业标准，肩负起社会责任。

材料二  公安部副部长黄明在2013年全国食品安全宣传周上的讲话指出：依法严厉打击食品安全犯罪，开展“打四黑除四害”（四黑：黑作坊”、“黑工厂”、“黑市场”、“黑窝点”。 四害：害百姓、害家庭、害社会、害国家。）专项行动，积极推动食品安全综合治理，食品安全事关民生福祉、事关和谐稳定的重大问题，需要社会各方面同心携手、共同治理。俗话说，“民以食为天”，解决好食品安全问题除了用法律手段严厉打击外，还应加强社会主义道德建设，树立社会主义荣辱观。

从文化生活的角度分析，解决好食品安全问题，必须加强社会主义道德建设，树立社会主义荣辱观的依据。

阅读理解。

Wednesday, October 29, 2008

     The United States federal government had two young men in the state of Tennessee arrested on October

22 on unknown charges.

     In court documents published on Monday, it came to light that the men had discussed attacking an African-

American school and killing 14 of them.

     Another crime was about planning to murder Presidential candidate Barack Obama. According to their

affidavits (口供), the suspects' "final act of violence" would be when they attacked Obama while wearing

white suits and top hats and driving"their vehicle as fast as they could toward Obama shooting at him from

the windows."

     The two suspects are Paul Schlesselman, 18, of West Helena, http://wx.jtyjy.com/ Arkansas and Daniel

Cowart, 20, of Bells, Tennessee. According to the court papers, they met last month over the Internet through

a friend. Schlesselman and Cowart are believed to share "very strong views" about White Power.

     Schlesselman listed "being racist" as his occupation on his MySpace page. He further wrote:"I'm white.

I'm proud. I get angry. I like guns."

     Cowart also had a MySpace page on which photos of guns were presented under a heading of "My Guns".

On his page he wrote, "Better to die quick fighting on your feet than to live forever begging on your knees."

     Some have questioned the pair's ability to carry out the charged plan, but authorities have been very

concerned about Obama as the first black presidential candidate from a major party.

     "We honestly don't know if they had the ability or the skill to carry out the kind of plan that they talked

about," said Malcolm Wiley, of the United States Secret Service in an interview with The New York Times.

"But we take any threat seriously no matter how big or how small it is."

     Cowart and Schlesselman are scheduled to appear before a judge on Thursday.

1. The passage is mainly about _____.

A. Americans' attitudes towards Barack Obama

B. two young men planning to commit violence

C. the violence in the United States

D. the disadvantages of the Internet

2. From the passage, we can know that the two young men _____.

A. shot 14 students in an African-American school

B. came from the state of Tennessee

C. were proud of Barack Obama

D. have not been sentenced yet

3. Which of the following shows the right order of the events?

    a. The two suspects were arrested.

    b. The two suspects will be tried in the court.

    c. Cowart set up his MySpace page on the Internet.

    d. Malcolm Wiley was interviewed by The New York Times.

A. a; b; c; d

B. d; c; b; a

C. c; a; d; b

D. c; a; b; d

4. What can we infer from the news?

A. The two young men strongly believed that the president should be a white man.

B. Most of the white people in the United States don't like Barack Obama.

C. The two young men planned to shoot President Barack Obama.

D. The two young men were innocent in fact.

液压上击器的上接头上部为（），下部为细牙螺纹同芯轴相连。

A、钻杆外螺纹

B、钻杆内螺纹

C、梯形螺纹

D、细牙螺纹

微博是新媒体中的新媒体，微博不仅改写了文学的生产与传播方式，也改变了文学的批评表达与传播方式。表面上我们的文学批评越来越专业化，文学批评者编织只在专业圈子内流通的话语云锦。微博打破了文学批评的专业壁垒，让批评为普通大众敞开大门，启动了文学批评的大众化时代，大大降低了文学批评的专业门槛，使得普罗大众可以对文学评头论足。
根据以上文字，下列说法正确的是( )。

A．文学批评者的文学批评视野狭隘，微博对其进行了升华，使得视野广泛
B．微博语境下的大众文学批评突破了专业文学批评的专业壁垒，使文学批评大众化
C．微博的出现使文学批评不再有专业壁垒
D．文学批评和微博批评的批评主体完全不同

对丁英、李民应如何处罚