2009年，某商品价值用货币表示为10元。2010年生产该商品的社会劳动生产率是20

当a=-3时，代数式a²-1的值是（    ）。

阅读理解。

     The iPhone, the iPad, the iPod: each of Apple's products sounds cool and has become a fad (一时

的风尚). Apple has cleverly taken advantage of the power of the letter "i"-and many other brands are

following suit. (仿效) The BBC's I Player-which allows Web users to watch TV programs on the

Internet-adopted the title in 2008. A lovely bear-popular in the US and UK-that plays music and video is

called "I Teddy". A slimmed- down version of London's Independent newspaper was launched last week under the name "i".

     In general, single-letter prefixes (前缀) have been popular since the 1990s, when terms such as e-mail and e-commerce first came into use.

     Most "i" products are targeted at young people and considering the major readers of Independent's"i", it's no surprise that they've selected this fashionable name.

     But it's hard to see what's so special about the letter "i". Why not use "a", "b",or "c" instead? According

to Tony Thorne, head of the Language Center at King's College, London, "i" works because its meaning

has become ambiguous. When Apple uses "i", no one knows whether it means Internet, information,

individual or interactive, Thorne told BBC Magazines. "Even when Apple created the iPod, it seems it

didn't have one clear definition,"he says.

     "However, thanks to Apple, the term is now associated with portability (轻便),"adds Thorne.

     Clearly the letter "i" also agrees with the idea that the Western World is centered on the individual.

Each person believes they have their own needs, and we love personalized products for this reason.

     Along with "Google" and "blog", readers of BBC Magazines voted "i" as one of the top 20 words that

have come to define the last decade.

     But as history shows, people grow tired of fads. From the 1900s to 1990s, products with"2000"in

their names became fashionable as the year was associated with all things advanced and modern.

However,

as we entered the new century, the trend disappeared.

1.We can infer that the Independent's "i" is aimed at         .

A. young readers      

B. old readers    

C. fashionable women    

D. engineers

2.The underlined word "ambiguous" means"         ".

A. popular          

B. uncertain      

C. definite            

D. fashionable

3. Nowadays, the "i" term often reminds people of the products which are        .

A. portable                          

B. environmentally friendly

C. advanced                          

D. recyclable

4. The writer suggests that           .

A. "i" products are often of a high quality

B. the popularity of "i" products may not last long

C. the  letter "b" replaces letter "i" to name the products

D. I Teddy is a live bear

《威尼斯商人》中的夏洛克的性格特点有（）。

A.贪婪

B.吝啬

C.狡猾

D.残酷

E.好色

《内蒙古农村信用社金牛借记卡章程》中规定，金牛卡分（）卡和（）卡两种，具有存取现金、转账结算、消费、查询等功能。

下图表示某种小鼠的进化过程，X、Y、Z表示生物进化中的基本环节。下列说法正确的是（）

A．小鼠性状的改变一定引起该小鼠种群的进化

B．X表示基因突变和染色体变异，为进化提供原材料

C．Y使该种群基因频率发生定向改变，决定了进化的方向

D．Z表示地理隔离，阻断了种群间基因的交流，导致新种产生