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[老师已改] 剑8 test3 小作文和大作文 谢谢老师!

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发表于 2015-8-17 18:53 |显示全部楼层
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小作文
These two diagrams illustrate how cement is produced by certain equipment and the process to produce concrete with it.
First of all, limestone and clay are mixed and crushed through a crusher into powder. After that, the powder pass a mixer. At the third stage, in a rotating heater, the mixture is rolled and heated by fire. Before pressing into cement, the powder need to be groud, for which a grinder is necessary. When cement is well produced, it is put into bags so that they can be transported all over the world.
In the second diagram, it can be seen that cement, water, sand and gravel are disposed together with a particular proportion (15%: 10%: 25%: 50%) in a concrete mixer. Then this machine rotates itself to produce concrete.
Overall, the two diagrams show the process of cement production with details and how it can be used during concrete production.

大作文
People have different views about whether raising the petrol price is the best way to addressing the problems of growing traffic and population. Personally, I agree that the increasing price of petrol can solve problems abovr effectively but not radically.
The main reason why I think that this method is effective is that people will buy less private cars and take more public transports such as subways and buses if the price of petrol grows up. In addition, less private cars benifit the traffic situation. Streets are no longer as crowded as before. Moreover, increasing petrol price inspires people to develop cheaper and cleaner energy, i.e. solar power, nuclear power. This way, the environment is saved from pollution.
However, higher petrol price can also  be a problem as petrol still dominates in the aspect of energy. Some developping countries will suffer from that. For example, poor governments can't afford enough petrol so that they can't provide their people with a living guarantee, which adds instability to the globle community.
In my opinion, I prefer to consider the increasing price as an alarm more than a method. What need to be done the most is to aware public of saving energy and protecting our plante. This requires more education rather than a higer price. Because the root of problems dues to a lack of awareness of protecting the environment. Besides, bicycles should also be spreaded to be used. Riding a bicycle is good not only to the environment but also to our body, and it can decrease traffic congestion effectively.
In conclusion, increasing the price of petrol is not the best but valid way to tackle  growing traffic and pollution problems. Many other ways like using clear energy should be taken to address these problems, too.

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