问题
选择题
用代数式表示：每件上衣a元，降价10%以后的售价是（ ）
A．a﹒10%
B．a（1+10%）
C．a（1-10%）
D．a（1+90%）
答案
降价后的价格为a（1-10%），
故选C．
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用代数式表示：每件上衣a元，降价10%以后的售价是（ ）
A．a﹒10%
B．a（1+10%）
C．a（1-10%）
D．a（1+90%）
降价后的价格为a（1-10%），
故选C．
| 完形填空。 | ||||
| The United States is full of automobiles (机动车). There are still many families without cars. But some families have two or 1 more cars. However, cars are used for more than pleasure. They are a 2 part of life. Cars are used for 3 . They are driven to offices and factories by workers who have no other way to 4 their jobs. When salesmen are sent to 5 parts of the city, they have to drive in order to 6 their products. Farmers have to drive into the city in order to shop for necessities. Sometimes, small children must be driven to 7 . In some cities, school buses are used only when children 8 more than a mile from the school. When the children are too 9 to walk that far, their parents take 10 driving them to school. One 11 drives on Mondays, taking her children and the neighbors' children as well. Another mother drives on Tuesdays, another on Wednesdays and so on. This is 12 forming a car pool (拼车). Working people also form car pools, with three or four people taking turns driving to the place 13 they work. More car pools should be formed in order to put 14 cars on the road and to use less oil. 15 is a great problem, and so is the traffic in and around cities. Too many cars are being driven. Something should be done about the use of cars. | ||||
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