额定容量Se是指一台水轮发电机长期安全运行的最大允许输出（）功率。 A.有功； B.

After ten years, the world' s largest music festival, Rock in Rio, returned to its hometown Rio de Janeiro for seven days of concerts from Friday, September 23rd, attracting 700,000 people over the whole week．

It is the 10th edition of the Rock in Rio festival, but only the 4th to be held in Rio as the organizers exported the festival to Lisbon and Madrid ten years ago．The first edition of the festival was in 1985 and the most recent edition in Rio was held in January, 2001．A total of 700,000 tickets were sold out for this year' s festival．

The festival consists of four stages with the participation of International stars including Elton John, Katy Perry, and bands Metallica, Evanescence and System of a Down．Several stars which performed in previous editions are also on the list this year．．In addition, a number of local singers and bands will also join this year．

The performance site, named as Rock City, is a 150,000-square-meter area．Besides the concert area, the site also has a giant Ferns wheel, a roller coaster, and a small shopping mall．After the festival, the Rock City area will be converted into a leisure area to athletes in the 2016 Olympic and Paralympic Games in Rio de Janeiro

According to Rio' s tourism company Riotur, out of the 700,000 people expected in the festival, some 315,000 will be tourists, who raised the hotels' occupation rate to 98 percent．Riotur estimated that the Rock in Rio festival will bring 419 million U．S．dollars for the city and create 10,000 jobs．

The creator of the festival, Brazilian businessmen Roberto Medina, insisted on opening the Rock City gates himself, in the early afternoon, and greeted the first fans to enter the site．"We come to the gate because the Brazilian audience is even more important than the bands．We applaud them．They make the greatest show," he said．

小题1:The first edition of the festival may be held in ____．

A．Rio de Janeiro

B．Lisbon

C．Madrid

D．a place not mentioned小题2:Up to now, the festival has been held in Rio for at least _____．

A．ten times

B．four times

C．three times

D．twice小题3:The number of native people to attend the festival is probably ____．

A．700,000

B．315,000

C．10,000

D．385,000小题4:From the passage, we can know ____．

A．Rock City is a great theatre

B．Only rock bands are invited to the festival?

C．the festival will improve the employment of Rio

D．The gate of Rock City was opened by the Brazilian audience

在2004年12月印度洋大海啸来临之时，一4岁旅游者见状，说：“妈妈，海啸、海啸，老师讲的海啸。”大家迅速撤离，逃过了一劫。而有的地方，人们见到被海啸击起的鱼时，纷纷争着去抢鱼，却被海浪卷走了。人们不知海啸是何物，是造成惨痛悲剧的重要原因。以上材料充分说明（　　）

A．理解比感觉更为深刻

B．人们往往容易被现象所迷惑

C．感性认识是不可靠的

D．真理是人们对事物的正确认识

长江中上游和黄河中上游河流的共同特征为（   ）

A．流量大

B．含沙量大

C．水能资源丰富

D．有结冰期

测试时，测试电源的电阻应低于（）。

A.1欧

B.0.1欧

C.0.5欧

D.1.5欧

粗基准的选择原则有哪些？