在华尔街大鳄抛出大量黄金做空黄金、黄金价格大跌20%时，大量中国民众冲进最近的店铺抢购黄金制品，由于抢购的人群中以中老年女性居多，于是人们将抢购黄金制品的中国民众统称为“中国大妈”。
金融大鳄抛出黄金导致黄金价格大跌，以至于“中国大妈”抢购金制品。这说明（）
①商品的价格由供求关系决定
②商品供求的变化引起价格波动
③价格变动影响生产经营活动
④价格变动影响人们消费需求
A.①③
B.②③
C.①④
D.②④
参考答案：D
解析：②④选项观点正确且符合题意，题中事例表明，商品供求的变化引起价格波动，同时说明价格变动影响人们的消费需求，故入选。①选项观点错误，商品的价格由价值决定，而不是由供求关系决定，故排除。③选项观点与题意不符，题中强调供求影响价格，而不是强调价格变动影响生产经营活动，故排除。
阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。 It was at a concert that I happened to find David. He was holding his head at a strange as if he were stating down at something. Then the truth struck me. He was blind. The last thing he remembers was his daughter being born. Then the world went . Bad luck is no stranger to this 44-year-old man. His mother died of cancer, and his weak father had to 11-year-old David to the care of the state. Things seemed always to go from bad to . Two years ago, his beloved guide dog pulled him out of the of a truck. David was not hurt. The dog . But David does not feel sorry for himself. "These are just little obstacles (障碍) you have to in your life," he said. He has to make a daily two-hour trip to his working place -- the X-ray department of an _ room. It was a hard job to . Before he got it, David was determined to escape the workshop ran by the Lighthouse, an organization to help blind people. He wanted a job of developing X-ray film, something , not just he, must do in the dark, including people with eyesight. The Lighthouse called many hospitals, with no result, they offered to pay his first three months' salary. David works alone in a dark room that of chemicals. He cannot wear gloves. , he could not feel. Since this is an emergency room, lives can be put or out of danger. His directress says she trusts him 100 percent. He makes $20,000 a year. But his motivation (动机) goes money. "By working, I can actualize my own . That's the most important!" he said. What a shining example for us to !
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