问题
选择题
下列计算结果中是负数的是（ ）
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答案
A、原式=3+（-3）=0；
B、原式=-5.7+5.5=-0.2；
C、原式=2
；1 4
D、原式=|-9|=9．
故选B．
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下列计算结果中是负数的是（ ）
|
A、原式=3+（-3）=0；
B、原式=-5.7+5.5=-0.2；
C、原式=2
；1 4
D、原式=|-9|=9．
故选B．
| 阅读理解。 | ||||||||
| Is the big city really a good place to bring up a child? Personally, I feel that it is probably the worst place to raise a child. To me, a child's health and safety are the most important things to consider, and a big city is simply too dangerous for young children. There is no doubt that a big city is not a healthy environment for a child to grow up in. Children in cities are constantly exposed (暴露于) to pollution from cars and factories. As a result, they can develop serious health problems which may stay with them for the rest of their lives. What's more, living in a big city can be dangerous for children. Since there are few parks or playgrounds, many children are forced to play in the streets, where they are in danger of getting hurt. There is also a lot of crime and violence (犯罪与暴力),which means that children's lives are at risk. On the other hand, there are usually much better education opportunities and leisure facilities (休闲设施) in a big city than in the countryside. For instance, village schools are often not well-equipped, and children may have to travel a long way to reach the nearest school. Similarly, a village or small town does not offer a wide choice of sports facilities, cinemas and so on. In conclusion, I believe that bringing up a child in a big city has far more against it than in its favor. The choice of schools and a wider variety of leisure facilities do not make up for the risks to a child's health and safety. | ||||||||
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