《关于统一计量制度的命令》于（）发布A、1959年6月25日； B、1957年6月2

“Where is the university（大学）?”This is a question that many visitors to Cambridge(剑桥大学) ask. But no one can give them a         answer, for no one can find any walls        the university. The university is the city. You can find classroom buildings,         , museums and offices of the university all over the city. And most of its members are the students and          of the thirty-one colleges.    

Cambridge was         a common town before the first students and teachers         800 years ago. It grew up by the river Cranta, and the river was once         the Cam. A          was built over the river as early as 875. So the town got its name “Cambridge”.    

In the fourteenth and fifteenth centuries more and more land was used for college buildings. The town grew much         in the nineteenth century after the opening of the railway in 1845. Cambridge became a city in 1951 and now there are over 100,000 people in it. Many young students in

other countries         to study at Cambridge. It has become a well-known place all around the world.   

如图，2011年中国邮政4月5日发行的《清明节》特种邮票一套3枚，分别为“祭祖”“踏青”和“插柳”，它采用了工笔重彩的表现方式，背景为蓝天、白云，具有浓厚的传统文化气。其中“祭祖”与中国古代的某种政治制度相联系，这种政治制度最大的特点是

A．嫡长子继承制

B．世袭制

C．任免制

D．强调孝廉

磁悬浮高速列车在我国上海已投入正式运行。如右图所示就是磁悬浮的原理，图中A是圆柱形磁铁，B是用高温超导材料制成的超导圆环。将超导圆环B水平放在磁铁A上，它就能在磁力的作用下悬浮在磁铁A的上方空中，则 

A．在B放人磁场的过程中，B中将产生感应电流；当稳定后，感应电流消失

B．在B放人磁场的过程中，B中将产生感应电流；当稳定后，感应电流仍存在

C．若A的N极朝上，B中感应电流的方向为顺时针方向

D．若A的N极朝上，B中感应电流的方向为逆时针方向

在社会主义道德建设中，为什么要提出和倡导公民基本道德规范？

下列哪些情形应以抢劫罪论处？（）

A、犯盗窃罪、诈骗罪、抢夺罪，为窝藏赃物而当场使用暴力。

B、携带凶器抢夺。

C、聚众哄抢公私财物，为抗拒抓捕而以暴力相威胁。

D、聚众“打砸抢”因而毁坏公私财物的首要分子。