Read the text again.
Which sentences of the text:
-
act as an introduction;
-
give an
overview of the system;
-
provide
details?
Write a number/numbers in your answer: 5; 6-8[1] This diagram gives an overview of a house
central heating system. [2] It shows how the tank, boiler and pipes make hot
water flow to the radiators and the taps.
[3] The cold water
enters the house and is stored in a water storage tank at the top of the system.
[4] From there it flows down to the boiler, located on the ground floor of the
house.
[5] The boiler, which
is fuelled by gas or oil, heats up the water when it passes through it. [6] Then
the pump pushes hot water around the house through a system of pipes, and the
hot water flows into the radiators, located in different rooms. [7] The water
circulates through the radiators, which have small tubes inside them to help
distribute the heat, and this warms each of the rooms. [8] Some of the water passes
to the taps.
[9] When the water finishes
the cycle through the pipes and radiators, it goes back to the boiler to be
re-heated and circulated around the house again.Which sentence(s) of
the text act as an introduction?