无线电波是通过天线发射到空间的，当电流在天线中流动时，天线周围的空间便产生（）。 A

在2010年的广州亚运会男子110米栏的比赛中上，中国“飞人”刘翔受伤后再度复出以13秒15获得冠军！刘翔在比赛中的平均速度约为（　　）

A．7.00m/s

B．8.37m/s

C．9m/s

D．10.00m/s

England will play Italy, Uruguay and Costa Rica in a tough Group D at the 2014 World Cup in Brazil. Roy Hodgson's men open their campaign against Italy in the Amazonian city of Manaus on 15 June in the only World Cup game which kicks off at 02:00 BST. England take on Uruguay on 19 June and play Costa Rica five days later.

Hosts Brazil are in Group A with Cameroon, Mexico and Croatia while the World Cup holders Spain open with a repeat of the 2010 final against Netherlands.

England will have to travel 1,777 miles from their chosen base in Rio for their first match in the tropical heat of Manaus.

Earlier this week Hodgson described Manaus as "the place to avoid" because of the climate—temperatures reach 30C and humidity is about 80%—although after the draw the England boss took comfort from the fact his team face a fellow European side.

"The conditions in the north will be tough, so we will both be in same boat," he said. "If we'd had three games up in the north, it would have been difficult."

Following Hodgson's initial comments, the mayor of Manaus, Arthur Virgilio, said England would not be welcome in the city.

England takes on two-time champions Uruguay in Sao Paulo and they play Costa Rica in Belo Horizonte—both cities are within 225 miles of their base.

England have never previously beaten Italy or Uruguay at a major tournament(锦标赛), while they have never faced Costa Rica.

Uruguay, who reached the semi-finals in 2010, and Italy, who knocked Hodgson's men out of Euro 2012, are ranked sixth and seventh respectively in the Fifa rankings while Costa Rica are 31st in the world - 18 places below England.

小题1:When and where will England play its third group stage match?

A．On 24 June; in Manaus

B．On 24 June; in Belo Horizonte

C．On 19 June; in Manaus

D．On 19 June; in Sao Paulo小题2:Which of the following can England take comfort from?

A．The place where its first match in the group stage is held.

B．The distance from its base to where its first match is held.

C．The fact that two of its group stage games are not in the north.

D．The fact that it is 7 places below Uruguay in the Fifa rankings.小题3:Which of the following is true according to the news report?  

A．Roy Hodgson is the coach of Brazil national football team.

B．Netherlands took the second place in the last World Cup.

C．The mayor of Manaus is a fan of the British soccer team.

D．England has never played against Uruguay in the history.

某研究小组进行与NH₃有关的系列实验。

（1）从下图中挑选所需仪器，画出制取干燥NH₃的装置简图(添加必要的塞子、玻璃导管、胶皮管。固定装置和尾气处理装置不用画)，并标明所用试剂。

（2）将NH₃通入溴水中，有N₂生成，反应的化学方程式为                    。

专栏评论是在怎样的时代背景下兴盛起来的？

区间装卸车时，非办理货运手续站的货车出入及其停留按中转车还是货物作业车统计？