Some people choose to put different types of food on their sandwiches that you wouldnt normally put on a hot sandwich.
For example if you were going to make a hot sandwich, it would have things like grilled chicken, fish, cooked and hot items.
The answer is sketchbook!
Answer:
The Romans constructed aqueducts throughout their Republic and later Empire, to bring water from outside sources into cities and towns. ... Aqueducts moved water through gravity alone, along a slight overall downward gradient within conduits of stone, brick, or concrete; the steeper the gradient, the faster the flow.
