若传热系统中各点的温度既随位置又随时间而变，此传热过程为（）。A.稳定传热 B.不稳

某幢可出租房地产尚有1年时间才可投入使用，与之类似的现房价格为5000元/m²，现房出租的年末净收益为500元/m²。若按折现率10%和风险补偿值100元/m²计，该幢房地产目前的价格应为（）元/m²。

A．4400

B．4409

C．4445

D．4455

2012年3月31日，新华网载文指出，抵制网络谣言是一道综合“考题”，其“应试者”不仅包括网站，还包括互联网管理者以及广大网民。能否出色地完成这道“题”，对所有“应试者”都是一种考验。完成得好，国家、社会和网民都将获益；反之，损害的将是共同的利益。对网民而言（  ）

①言论自由是公民的基本政治权利 ②应该自觉维护国家安全、荣誉和利益

③应坚持权利和义务的统一       ④应坚持民主集中制的组织原则

A．①②

B．①③

C．②④

D．②③

Britons stranded（搁浅）at sea or in flooded homes could find a real-life prince riding to their rescue. Prince William announced on Monday that he is to train to be a full-time pilot with the Royal Air Force's Search and Rescue Force (SARF).

William, who is currently a Lieutenant（中尉）in the Army's Household Cavalry Regiment（皇家骑兵团）, will transfer to the RAF and begin an 18-month training course in January 2009.

If successful, he will become a fully operational Search and Rescue pilot in 2010, flying Sea King helicopters at one of the six SARF units based in Britain.

"The time I spent with the RAF earlier this year made me realize how much I love flying," the prince, who spent two weeks with a SARF team while on work experience in 2005, said in a statement.

"Joining Search and Rescue is a perfect opportunity for me to serve in the Forces operationally, while contributing to a vital part of the country's Emergency Services."

It means he will follow a similar career to that of his uncle, Prince Andrew, who was a Sea King helicopter pilot during the 1982 Falklands war.

The Search and Rescue teams' main duty is to recover RAF personnel but in peacetime they mainly respond to civilian emergencies, dealing with more than 1,000 calls a year.

The units deal with incidents ranging from helping those trapped by sudden major floods to rescuing people lost while out walking on hills.

William, who has spent the last year on secondment（借调）to the various branches of the military to prepare for his future role as head of the armed forces, received his RAF wings （飞行勋章）following a four-month stint（持续的工作）with the service earlier this year.

However, his time with the RAF was clouded when the Defense Ministry was forced to fend off criticism for allowing the prince to fly military helicopters to a bachelor party for his cousin and to the family home of his girlfriend Kate Middleton.

小题1: Prince William wanted to be a full-time pilot because _____.

A．he liked flying

B．he would like to do something in the country’s Emergency Services

C．many Britons were in danger at sea waiting for rescue

D．he had much experience in flying小题2:According to the passage, _____.

A．the Falklands war broke out in 2005

B．Prince William served in the Army’s Household Cavalry Regiment in 1982

C．Prince Andrew is serving in SARF now

D．William would finish his training course in June 2010小题3:It can be inferred from the passage that______.

A．the RAF is an army that rescues its soldiers during wartime

B．either Andrew or William is interested in flying

C．there are many floods happening in Britain

D．the prince saving the people in danger is no longer fairy tale小题4:The author’s opinion on William’s joining RAF is ______.

A．enthusiastic

B．doubtful

C．negative

D．pessimistic小题5:What is the purpose of the author by mentioning what the prince had done before in the last paragraph?

A．The author wants to say that Prince William pays much attention to his family and friends

B．The author suggests that the Defense Ministry was criticized when William flew for his private business

C．William had a hard time when he went against his leaders

D．The author has the worry that Prince William is likely to get the Defense Ministry into trouble again.

乙公司以国产牛肉5万斤伪称A国进口牛肉，与甲公司签订购销合同。后甲公司得知这一事实，而此时恰逢A国流行畜病，A国牛肉无人问津，而国产牛肉价格上涨，甲遂决定履行该合同，而乙公司则希望以高价将该批十肉实给其他客户，下列表述中错误的是：

A．甲公司有权以订立合同中存在欺诈为由，主张撤销该合同

B．乙公司有权以订立合同中存在欺诈为由，主张撤销该合同

C．甲公司向乙公司催要货物，则该合同成为确定有效的合同

D．甲公司向乙公司支付货款，则该合同成为确定有效的合同

格物致知