最全雅思示意圖題寫作

1、一· The diagram below shows how a water tower works. · Summarise the information by selecting and reporting the main features and make comparisons where relevant.· A water tower consists of a large tank (D), which contains water and which is raised high enough above ground to prov

2、ide the necessary level of water pressure for a community. The tank is connected to the water system's primary feeder pipes (C) by a vertical pipe. Drinking water for a town is first treated in a water treatment plant (A) to remove sediment and bacteria. A pump (B) then sends it via the primary

3、feeder pipes to the customers (E). If the community demands more water than the pump can supply, the water flows out of  the tank to meet the need.二· The diagram below shows how a thermos flask works.· Summarise the information by selecting and reporting the main features and make com

4、parisons where relevant.· The thermos flask is used to keep the liquids and remain the temperature. Its most common use is to keep hot drinks, for example coffee, hot but you can also use it to keep things like milk cold. ·  A thermos flask is a cylinder-shaped object between 30

5、and 40 cm high. The inside of the thermos flask is a flask made of glass. There is nearly no air inside this glass, so it is a very poor conductor. In addition, the glass is silvered, which reduces infrared radiation. This vacuum flask is surrounded by another cylinder made of metal or plastic, whic

6、h protects the fragile glass inside. · The top is a plug or cap, usually made of cork or plastic, which is covered by a plastic cup. This is taken off and used to drink the liquid from. Some heat escapes from the cap but the special design of the thermos flask means that liquid maintains i

7、ts temperature for several hours.三· The diagrams below show some principles of house design for cool and for warm climate.· Summarise the information by selecting and reporting the main features and make comparisons where relevant.· The diagrams illustrate how climate influences the d

8、esign of houses. It can be noticed that the roof, windows and building materials of houses in cool and warm climates are considerably different.  · In cool climates, special attention is given to the use of building materials that can store heat, and insulation is used on the outside of th

9、e house to avoid heat loss. Careful positioning of the building and large windows facing winter sunlight also assist to passively heat the house. The roof has an extreme angle to assist the snow to run off and roof overhang does not interfere with sunlight.  · Houses in warm climates requi

10、re the opposite approach. Insulation and reflective roof material aim to keep heat from the sun out. Windows are placed under a wider roof overhang so that they are shaded from direct light in the day and so that cooler night air can move through the house when the windows are open.四· The diagr

11、am below shows how river speed affects the pollution in the river.· Summarise the information by selecting and reporting the main features and make comparisons where relevant.· The diagram shows the ways in which the pollution in the river is affected by river speed. · In the upp

12、er stream of the river where water moves fast, pollutants from both industry and farming tend to float and are carried downstream by the rushing river water. Because of the fast speed at which these pollutants travel in the river, they cannot reach the bottom and therefore become part of the silt on

13、 the river bed. · At the mouth of the river, however, due to the low speed at which they travel, pollutants from industry and farming are forced to descend and deposit in the mud at the river bottom. Pollutants from industry are obviously heavier and therefore can be found at the far side

14、from the sea, while agricultural pollutants are lighter and are carried further to the part of the river mouth where they are absorbed by sea grasses and become part of the food or nutrients for those plants. 五· The diagrams below show how humans and plats interact to produce oxygen and ca

15、rbon dioxide. · Summarise the information by selecting and reporting the main features and make comparisons where relevant.· This diagram illustrates the process which occurs when plants and human beings create oxygen and carbon dioxide. · Plants make oxygen through a proces

16、s called photosynthesis. To do this, plants need certain elements. Firstly they take in water through their roots from the earth below. Secondly they take in carbon dioxide (CO2) from the air around them. Apart from these, they also need to absorb sunlight from the sun above. With water, carbon diox

17、ide and air, plants are able to produce oxygen through photosynthesis. · Humans and animals perform an opposite process. Humans and animals take oxygen into their lungs through breathing. When humans and animals exhale, they breathe out carbon dioxide.· In conclusion, plants, humans a

18、nd animals provide services for each other. Humans and animals need the oxygen that plants produce in order to stay alive. When humans and animals breathe out, they provide the carbon dioxide that plants need in order to survive. 六· The diagram below shows how to obtain water outdoors.

19、0;· Summarize the information by selecting and reporting the main features.· The picture shows a simple approach to get water outdoors.· The materials needed for this set are all easy to get. Firstly, prepare two glasses, one of which is much larger than the other. Secondly, find some

20、 green plants as the resource of water. Thirdly, set the green plants and put the small glass into the larger glass, then cover the opening of the larger glass with « big plane. After that, place a piece of plastic film over the Plane and Put some stones on top of the film to fix it. Finally, p

21、ut the whole set in the sun. After a while, vapor produced by the green plants reaches the plastic film and changes to drops. The water drops finally fill in the smaller glass.· When we are short of water in the forest or field, this simple set may be the easiest way for us to get rid of thirst

22、七· The two diagrams below show the construction structures of the Mont Blanc Road Tunnel and the Aomori Hakodate Tunnel. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.· The two pictures show the construction structures of two tu

23、nnels. They are different in many aspects.· The Mont Blanc Road Tunnel was built for closer connection between Italy and France. It goes through the mountain which is about 1.2 km high. The tunnel is a straight tube with a total length of 11.6 km. And people spent almost 9 years to complete thi

24、s construction.· By contrast, the Aomori Hakodate Tunnel in Japan was a domestic one. It was built to connect the cities of Hokkaido and Honshu. Instead of a mountain, this tunnel was built beneath water area, which is 18.52 km in width and 132 metres in depth. Moreover, the construction is a c

25、ombination of three straight tubes with a total length of 53.85 km to fit the shape of the water- Reaching the depth of 240 metres from the water surface, the bottom of the tunnel is even deeper than the water to avoid the very hard stone layer 0f quartzite around. This construction takes workers ne

26、arly 25 years to complete it.八· The picture below shows how a hot balloon works. Summarize the information by selecting and reporting the main features.· The picture illustrates the working principle of a hot balloon.· A hot balloon is mainly composed of a large envelope, a basket and bur