问题 问答题

(6分)作为推行“低碳经济”的重要科技进步,太阳能 光伏发电成为2010年上海世博会的“亮点”。太阳能光伏发电最关键的材料是高纯硅。三氯甲硅烷(SiHCl3)还原法是当前制备高纯硅的主要方法。生产流程示意图如下:

(1)三氯甲硅烷(SiHCl3)是由        种元素组成的化合物。

(2)“精馏”也是蒸馏的一种形式。通过蒸馏可把液体混合物分离开,原理是利用混合物各成分的          (填“熔点”或“沸点”)不同。

(3)写出从粗硅到SiHCl3(粗)的化学方程式                                  

(4)为了达到绿色化学和资源综合利用的目的,上述生产流程中某些物质可循环使用,这些物质是           _________(填化学式)。

(5)石英砂的主要成分是SiO2,含有少量Al2O3。若要除去石英砂中少量的杂质,可选用的试剂是             __________(填化学式)。

答案

(1)3 (2)沸点(3)Si+3HCl  SiHCl3+H2 (4)H2、HCl

(5)HCl或HNO3或H2SO4

(1)三氯甲硅烷中含有Si、H、Cl三种元素;

(2)蒸馏可把液体混合物分离,原理是利用混合物各成分的沸点不同;

(3)粗硅和HCl反应,生成SiHCl3,同时还生成H2,反应的方程式为:Si+3HCl  SiHCl3+H2

(4)上述生产流程中由粗硅到三氯甲硅烷和由三氯甲硅烷到高纯硅是两个相反的过程,因此,这些过程中,H2、HCl可以循环使用;

(5)SiO2是非金属氧化物,而Al2O3是金属氧化物能与酸反应,利用稀盐酸可以将Al2O3反应除去.

多项选择题
阅读理解

Armed only with iPhones, the inventive rock band Atomic Tom has gone viral(广为流传) by way of the New York subway. The band has scored an Internet hit with the video to the song “Take Me Out.”

Singer Luke White says the production was a top-secret operation.

“We didn't tell anyone about this. It was completely top-secret from our family, from our friends, from our label, our management, everybody. So the first time that people saw this video was last Friday when we put it on YouTube,” explained White.

Since uploading the video to YouTube, band members have spent several days refreshing the page to watch the number of hits rise.

The video has also made its way around Twitter as many people have shared it with their friends.

“I mean, it still hasn't quite hit. It's just kind of blowing our minds right now that we're getting this: many people are fond of it, and they're sharing it with their friends. We don't know what it's like really to have something that's viral, so all of this is very new to us.” said Eric Espiritu, the lead guitarist of the band.

White explains how the video came together:

“We did our research with the applications( 应用程序) and found applications that worked out really well with the instruments and then we plugged them all into, plugged our phones into mini-battery powered amplifiers(扩音器) that we put underneath our seats, and we did a lot of, you know, practices, in terms of figuring out what the balance of the sound and like who was overpowering, who was too loud or who was too soft.”

The idea for the video came from Espiritu's younger brother Benjamin. The younger Espiritu directed the video from his initial concept through the final edit and upload to the Internet. 

“I've seen a lot of the music applications come out, and I've never actually had the chance to play with them," says Ben Espiritu. "When I started hearing about how they sound and everything, I thought it might be unique to take it one step further and then create an entire band just performing solely(单曲) on the iPhones, and I thought it would be a pretty cool idea.”

Ben says the success of the band’s music video is a credit to the talent and ability of the musicians, but it's also a sign of the times.

“It really comes down to seeing something different, seeing something unique, and I think that that's always, in any type of art form, what will speak to people, and I think it does reflect the times that we live in, taking a smart phone and then being able to turn it into an instrument, not only just an instrument, but making it sound really good.”

小题1: Who first saw the video of the song “Take Me Out”?

A.Their friends

B.The people on line

C.Their family

D.Their management小题2: What is the band members’ attitude towards the sudden fame?

A.They are thrilled.

B.They are quite used to it.

C.They are kind of confused.

D.They are so excited as to tell everyone they know.小题3: How did the video come into being?

A.The band copied from it other musicians.

B.It had already existed in the iPhones before they bought them.

C.The band created it with the help of the applications in the iPhones.

D.The band made full use of the traditional instruments to make the song.小题4: What is the significance of the success of the band's music video?

A.It has introduced us several talented musicians.

B.It has made the musicians into millionaires.

C.It teaches the young a big lesson.

D.It reflects the talent and ability of the musicians and the times that we live in.