在一个长、宽、高分别是２米、１米和１米且六面都封闭的透明玻璃柜内，底面两侧分别放置一个电炉（有导线连到柜外）和一大盆冰块。在玻璃柜顶面中部的内壁贴一张下垂的纸片A，在玻璃柜底面中部的内壁贴一张竖立的纸片B（如下图所示）。在电炉通电一段时间之后，根据纸片A、B的偏动情况，可以模拟验证某一地理原理。
小题1:实验验证的地理原理是
A．板块的碰撞运动
B．海洋中密度流的形成
C．地球自转的偏向力影响
D．大气的热力环流小题2:中纸片A、B的偏动情况是
A．纸片A、B同时偏向冰块方向
B．纸片A、B同时偏向电炉方向
C．纸片A偏向冰块方向、纸片B偏向电炉方向
D．纸片A偏向电炉方向、纸片B偏向冰块方向
小题1:D
小题1:C
本题考查热力环流。
小题1:实验反映地面的冷热不均引起的大气运动，为热力环流。
小题2:根据电炉受热后，空气上升，冰块冷却后形成下沉气流，故近地面气流由冰块处流向电炉处，而高空气流从电炉上空流向冰块上空，故C项正确。
Passage Two
| In 1998 consumers could purchase virtually anything over the Internet. Books, compact discs, and even stocks were available from World Wide Web sites that seemed to spring up almost daily. A few years earlier, some people had predicted that consumers accustomed to shopping in stores would be reluctant to buy things that they could not see or touch in person. For a growing number of time-starved consumers, however, shopping from their home computer was proving to be a convenient alternative to driving to the store. A research estimated that in 1998 U.S. consumers would purchase ＄ 7.3 billion of goods over the Internet, double the 1997 total. Finding a bargain was getting easier, owing to the rise of online auctions and Web sites that did comparison shopping on the Internet for the best deal. For all the consumer interest, retailing in cyberspace was still a largely unprofitable business, however. Internet pioneer Amazon. com, which began selling books in 1995 and later branched into recorded music and videos, posted revenue of $153.7 million in the third quarter, up from ＄ 37.9 million in the same period of 1997．Overall, however, the company’s loss widened to ＄ 45.2 million from $ 9.6 million, and analysts did not expect the company to turn a profit until 2003．Despite the great loss, Amazon com had a stock market value of many billions, reflecting investors’ optimism about the future of the industry. Internet retailing appealed to investors because it provided an efficient means for reaching millions of consumers without having the cost of operating conventional stores with their armies of salespeople. Selling online carried its own risks, however. With so many companies competing for consumers’ attention, price competition was intense and profit margins thin or nonexistent. One video retailer sold the hit movie Titanic for ＄ 9.99, undercutting (削价) the ＄19.99 suggested retail price and losing about ＄ 6 on each copy sold．With Internet retailing still in its initial stage, companies seemed willing to absorb such losses in an attempt to establish a dominant market position. |
"For all the consumer interest" (Para.3) means______.
A．to the interest of all the consumers
B．for the interest of all the consumers
C．all the consumers are much interested
D．though consumers are very much interested