阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。
A
James Dyson is the inventor of the cyclone(气旋) Dyson vacuum cleaner that completely transformed the way vacuum cleaners are designed. Traditional vacuum cleaners would suck up air and dust using a fan and then the dust was filtered by the pores(气孔) in the bag. The dust stayed in the bag and the air escaped. The problem with that design was that the pores in the bag very quickly get blocked with the dust, the air couldn’t escape and so the sucking power and cleaning efficiency drops.
Dyson’s cyclone technology doesn’t use any bags at all. Air is sucked into a plastic cone-shaped object. The dust is separated from the air thanks to centrifugal forces(离心力). The dust falls to the bottom and is collected in a tray and pure air escapes. No blocking, no loss of suction and no smells.
It took him 15 years of his life and over 5,000 prototypes working in his garage to come up with a working model! Completing the design of the cyclone cleaner was just the start of Dyson’s incredible story. You would think that the manufacturers of traditional cleaners would have been eager to do a deal with Dyson in order to license his superior product. — Wrong!
From their short-sighted perspective, they didn’t want to pay Dyson licensing fees for his invention because that would reduce their net profit. In their opinion, they could just carry on with their inferior product and continue making their massive profits. They refused to do business with Dyson, certain that his invention would go away without their investment.
Most people would have just given up there. Not Dyson. He made the decision to start his own manufacturing company and to beat them at their own game. In 1993, he set up a factory in the UK to produce the Dyson Dual Cyclone and then started advertising it directly to the British public using TV ads with the slogan “Say goodbye to the bag”. It was a huge success and went on to outsell cleaners made by the very same manufacturers that had rejected him. Sweet revenge.
21. What is the major difference between Dyson’s product and other vacuum cleaners?
A. It uses fewer bags. B. It produces less noise.
C. It allows for the free flow of air. D. It sucks up air and dust using a fan.
22. Why didn’t the manufacturers cooperate with Dyson?
A. Because the public were not interested in his ads.
B. Because Dyson had already set up his own company.
C. Because they believed his product was less profitable.
D. Because they thought their existing products were superior.
23. What qualities contributed to Dyson’s success?
A. Teamwork spirit and generosity. B. Commitment and persistence.
C. Integrity and kindness. D. Punctuality and creativity.
