听下面一段材料,回答第1-4题。 1. When did the man go to Ecuador? A. 1993 B. 1994 C. 1995 2. What kind of organization is Pedal Power? A. charity B. business C. education 3. Why was the man’s neighbour successful in business? A. It was easier for him to reach customers. B. He was the most skilled craftsman in the town. C. He sold many bikes to craftsman in the town. 4. How much money do they sell the second-hand bikes for? A. 5% of the normal price B. 10% of the normal price C. 15% of the normal price |
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9除以[ 6/7(1-2/5)]=35千克 6/7后面是什么符号?
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