问答题
The diagrams below show the stages and equipment used in the cement-making process, and how cement is used to produce concrete for building purposes. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
【正确答案】
【答案解析】[参考范文]
The diagram on the left illustrates the process by which cement is made whilst the diagram on the right shows us how concrete is made.
We can clearly see that the first stage in cement production is to put two substances-limestone and clay-through a crusher to create a powder. This powder then goes through a mixer and is then heated in a rotating heater. Once the powder has gone through the mixer and heater, it is ground and the cement is packed into bags.
The diagram on the right hand side tells us that concrete is a mixture of four ingredients in differing proportions. Cement makes up 15% of the mixture, water constitutes 10%, sand 25%, and gravel (i.e. small stones) 50%. These ingredients are mixed in a rotating concrete mixer to make concrete.
In summary, the production of cement and the production of concrete appear to be fairly simple processes.
The diagram on the left illustrates the process by which cement is made whilst the diagram on the right shows us how concrete is made.
We can clearly see that the first stage in cement production is to put two substances-limestone and clay-through a crusher to create a powder. This powder then goes through a mixer and is then heated in a rotating heater. Once the powder has gone through the mixer and heater, it is ground and the cement is packed into bags.
The diagram on the right hand side tells us that concrete is a mixture of four ingredients in differing proportions. Cement makes up 15% of the mixture, water constitutes 10%, sand 25%, and gravel (i.e. small stones) 50%. These ingredients are mixed in a rotating concrete mixer to make concrete.
In summary, the production of cement and the production of concrete appear to be fairly simple processes.