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Questions 11 to 18 are based on the conversation you have just heard.
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患者男性，28岁，1d前出现发热，恶心呕吐，腹泻 7次，伴里急后重。便培养示志贺痢疾杆菌生长。 其腹泻的发生机制是
Questions 11 to 18 are based on the conversation you have just heard.
Reebok executives do not like to hear their stylish athletic shoes called "footwear for yuppies". They contend that Reebok shoes appeal to diverse market segments, especially now that the company offers basketball and children’s shoes for the under-18 set and walking shoes for older customers not interested in aerobics or running. The executives also point out that through recent acquisitions they have added hiking boots, dress and casual shoes, and high performance athletic footwear to their product lines, all of which should attract new and varied groups of customers.Still, despite its emphasis on new markets, Reebok plans few changes in the upmarket retailing network that helped push sales to $1 billion annually, ahead of all other sports shoe marketers. Reebok shoes, which are priced from $ 27 to $ 85, will continue to be sold only in better specialty, sporting goods, and department stores, in accordance with the company’s view that consumers judge the quality of the brand by the quality of its distribution.In the past few years, the Massachusetts-based company has imposed limits on the number of its distributors (and the number of shoes supplied to stores), partly out of necessity. At times the unexpected demand for Reebok’s exceeded supply, and the company could barely keep up with orders from the dealers it already had. These fulfillment problems seem to be under control now, but the company is still selective about its distributors. At present, Reebok shoes are available in about five thousand retail stores in the United States.Reebok has already anticipated that walking shoes will be the next fitness-related craze, replacing aerobics shoes the same way its brightly colored, soft leather exercise footwear replaced conventional running shoes. Through product diversification and careful market research, Reebok hopes to avoid the distribution problems Nike came across several years ago, when Nike misjudged the strength of the aerobics shoe craze and was forced to unload huge inventories of running shoes through discount-stores. What lesson has Reebok learned from Nike’s distribution problems（）
Latin American stocks fell for a second day on Friday in reaction to Asia’s currency and stock market crash. There were fears that the Asian crisis could influence investors in other emerging markets.Argentina and Mexico (19) the highest falls, with their indexes down by 4% by the (20) of trading on Friday. Brazil’s Bovespa index, which on the same day (21) by far the steepest plunge in the Americas, was down 2.9 %."What’s happening in Hong Kong has been a terrible (22) to the system," said Richard Watt, who (23) 3.5 billion dollars in emerging market investments for BEA Associates in New York. Investors in Brazil were concerned that its economic problems were dangerously (24) to those that have caused the currency and market plunges in Thailand, Malaysia and other Asian (25) ."Brazil’s economy is far from (26) ," said lan Campbell, chief economist at ABN Amro Bank NV Amsterdam. "Its current account and fiscal (27) are large and its currency is overvalued." "There’s no (28) in trying to catch a falling knife," said Jane Heap, Latin American stock strategist at Deutsche Morgan Grenfell. "There’s no room for (29) in Brazil until the US and Asia get back to normal."There were also concerns that foreign investors who specialize in emerging markets could be (30) to sell their shares in Latin America to (31) their Asian losses."There’s a lot of nervousness about whether investors will (32) their money out of stocks, because of instability in Asia." Said German Guerrero, chief trader at the Chilean brokerage Celfin SA.Chilean markets were down only (33) in afternoon trading. The Chile selective stock index fell 0.72 % and the Chile general stock index was down 0.64 %. 19（）
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