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问题 选择题

近年来，科学家研制了一种新型的乙醇电池，它用酸性电解质（H+）作溶剂．电池总反应为：C2H5OH+3O2=2CO2+3H2O，下列说法不正确的是（　　）

A．乙醇在电池的负极上参加反应

B．1mol CH3CH2OH被氧化转移6mol电子

C．在外电路中电子由负极沿导线流向正极

D．电池正极的电极反应为4H++O2+4e-→2H2O

答案

A．由反应的总方程式可知乙醇被氧化，在负极上失去电子，故A正确；

B．负极反应式为C2H5OH-12e-+3H2O=2CO2+12H+，1molCH3CH2OH被氧化转移12mol电子，故B错误；

C．电子经外电路流向正极，故C正确；

D．正极氧气得电子生成H2O，电极反应式为4H++O2+4e-=2H2O，故D正确．

故选B．

不定项选择

某房地产开发公司通过拍卖出让方式获得了一宗20hm2的土地，用来进行居住小区的开发建设，经批准的规划设计方案为：居住用地面积14hm2，住宅用地面积10hm2，总建筑面积40万m2，住宅建筑面积30万m2，其中多层4幢，高层2幢，预计总投资6000万元。

城市规划部门列出的规划设计条件中属于控制指标的有（）。

A.停车率

B.容积率

C.人口容量

D.绿地率
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阅读理解
阅读理解。
     Have you got a Facebook account? Are you thinking of getting one? Jamie Simmonds has just signed 
up. Let's see how she's getting along.
                                                                     My Diary
     MONDAY: I'm officially a Facebooker. I find a few people I used to know and I've soon got seven
friends. I've never felt so popular! I wonder if my old university flatmate Steve is on here…What do you
know! He is! Maybe Facebook has its uses.
     TUESDAY: I've received lots of nice welcoming messages on my wall. Later, I meet up with Steve
for a drink after not seeing him for five years. We get on really well! Then, he uses his Facebook app for
iPhone to suggest me as a friend to some other former classmates. Some of them even come to the pub
and it's just like old times - possibly a bit too much like old times. During the night, photos are uploaded to Facebook.
     WEDNESDAY: Disaster! My mum's on Facebook! Has she seen the photos of me dancing on the
table from last night? Has she shown them to dad? Oh. And I have a friend request - mum again!
     THURSDAY: There's a message from my boyfriend, "so, it's over then, is it?" Evidently I haven't
changed my settings to show I'm "in a relationship", and I haven't even added him as a friend. Ah, well, I
wonder what my ex-boyfriend is doing… Whoops! I accidentally type his name into my status box instead of the search 'oox, and now every one can see it on their news feed.
     FRIDAY: rime to update my status: "Work is boring. Can't wait for the weekend!" Yeah, that about
sums it up. Oh, look, I've received a comment! Someone must feel the same way. Lots of my friends now
"1ike" this status.
     SATURDAY: Good news! I've got 100 friends but wait! Someone's "un-friended" me! I look through my "friend list" to try to work out who it was. Why did they do that? Am I really such a terrible person? I
never knew Facebook could be this cruel.
SUNDAY: Wake up. Check my Facebook page. Make coffee. Check my Facebook page again. Get
ready to leave. Change my mind and check my Facebook page …
     In July 2010, Facebook had more than 500 million active users. The average Facebook user has 130
friends. Facebook is translated into more than 70 different languages. The world spends 700 billion
minutes a month on Facebook. Facebook creator Mark Zuckerberg's Facebook page says he's a
Harvard graduate, even though he actually dropped out to focus on Facebook. The site is valued at
between $7.9 and $11 billion.
1. Why did Jamie's boyfriend ask her whether she had broken up with him?
A. He had seen photos of Jamie dancing on the table.
B. She showed in her facebook that she was still not dating anyone. 
C. Her boyfriend was angry that she refused to add him as her friend.
D. He saw the name of her ex-boyfriend on his news feed.
2. Which of the following is conveyed in this article?

A. Visiting Facebook website took up a large part of Jamie's time and energy.
B. Jamie is enthusiastic about her present job.
C. Facebook was created by a Harvard graduate, Mark Zuckerberg.
D. Compared with Facebook, Twitter is a better choice for Jamie.

3. What does the word"un-friend" mean in"Someone's 'un-friended' me!"? 
A. Be unfriendly to others.                
B. Have a quarrel with somebody.
C. Remove a name from the friend list.      
D. End friendship with somebody.
4. It can be learned from the passage that the writer's attitude towards Facebook is ____ . 
A. approval        
B. objective          
C. negative        
D. positive
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