■ Direction You have 20 minutes to plan and write your response. You response will be judge on the basis of The quality of writing and on how well your response presents the points in the lecture and the relationship to the reading passage. Typically, an effective response will be 150 to 225 words.
■ Question Summarize the points made in the lecture you just heard, explaining how they cast doubt on the points made in the reading

IELTS Writing 캠브릿지8 Test3 Task1 시간제한없이.

These images illustrate the two production process, first one is for cement and the second for concrete which contain some cement.

First in cement production procedure, we can see the main sources of the cement, limestone, clay and even powder. Limestone and Clay are going to Crusher firstly, because those elements need to be disintergrated. After breaking down them, Mixer would mix the three components. That mixed thing should be heated by Rotating heater. Rotating heater shapes like round-pilar and round over the mixed element, so that utility could facilitate to transfer equal quantities of heat on every side of that element. The pre-cement which was going throughout the heating system would be drove into Grinder, and that would be cement at all. The cement are always packaged in bags.

In second image, we can find that cement is clearly a significant sources for production of concrete. There are four main sources for concrete in this figure, cement, water, sand and Gravel(small stones). Gravel is by far the most greatest element of concrete, with half of all proportion. And this percentage is twice as likely as that of sand.

However, cement and water are insignificant elements relatively. The proportion of water is 10 per cent, which is just 2 in 3 of cement ratio. In conclusion, those four sources are mixed in Concrete mixer to be concrete.

Overall, the first image illustrates how to make cement and secoond one how proportion of elements to make concrete.