同学们在操场上玩游戏，大家围成一个正方形，每边有18个同学，一共有（）个同学在玩

机体在手术创伤时下列哪种激素分泌水平下降

A．儿茶酚胺

B．糖皮质激素

C．胰岛素

D．促肾上腺皮质激素

E．胰高血糖素

关于法的效力，下列说法错误的是( )

A．凡是国家机关制定的规范性文件和非规范性文件都具有法的效力

B．国家机关制定的规范性文件和非规范性文件未必都有法的效力，只有那些依据法定权限和程序所制定的规范性法律文件才具有法的效力

C．一般而言，法的效力来自于制定它的合法程序和国家强制力

D．中国公民在中国领域内一律适用中国法，这是法的效力的一种体现

Group Tours of the Area of the 2012 Sites

These are recommended tours for groups. Individual visitors wishing to join please click here.

East London and the Olympic Park Tour

From Central London, travel through London’s East End — recently fashionable, multicultural residential areas, and once famous for market gardens, fine churches, and shipping-related industries. Hear a little of the dark side with stories of Jack-the-Ripper and street gangs.

Now into the 21st century, you arrive at the Olympic Park, already under construction. Imagine the 80,000-seat Main Stadium, the Multi-Sports Arena, Aquatics Centre, Velodrome, Olympic Village, Broadcasting & Media Centre and Stratford City.

For those who have a whole day in which to see East London we recommend a morning East London and Olympic Park tour combined with an afternoon Olympic Greenwich tour.

2012 Sites Tour

The tour starts in Stratford where you view the work in progress on the Olympic Park.

Hear the history of London’s Royal Docks, as you travel to the Boxing, Judo, Weightlifting, Wrestling, Table Tennis and Taekwondo venue. View the O2 Arena. See the new London City Airport, Thames Barrier Park, University of East London, new waterside apartments and smart hotels.

For those who have a whole day in which to see 2012 Olympic London we recommend a morning 2012 Olympic Sites tour combined with an afternoon 2012 Olympic Greenwich tour.

2012 Greenwich Tour

Greenwich will host 6 Olympic events.Your tour of Greenwich will include the Greenwich Park, where the equestrian events will take place.

Cross the Meridian Line to see the large buildings at Woolwich. Finally, we can show you the exciting developments taking place on the Greenwich Peninsular, which will be hosting a number of Olympic events.

小题1:What can be learnt from the passage?

A．London’s Olympic Park is being built.

B．London’s East End hasn’t changed much.

C．More than 6 Olympic events will take place in Greenwich.

D．No events will be hosted on the Greenwich Peninsular.小题2:Which of the following is not included in 2012 Sites Tour?

A．Hear the history of London’s Royal Docks.

B．View the O2 Arena.

C．See the new London City Airport.

D．Cross the Meridian Line.小题3:If you want to visit the place where the equestrian events will take place, which tour will you choose?

A．East London and the Olympic Park Tour

B．2012 Sites Tour

C．2012 Greenwich Tour

D．Olympic Park Tour

对于具有季节变化的时间序列，为消除季节变动的影响，可以计算年距发展速度。

发热值高的煤气是（）。

A.高炉煤气

B.焦炉煤气

C.发生炉煤气