In what ways did the Romans use concrete in their construction methods?
Formwork using wooden temporary supports to pour
arches
Coffered ceilings to create domed structures
Poured concrete to create the channels of the
Aqueducts
All of the above
Question 2
The Crystal Palace was considered an engineering marvel for its time because:
It was prefabricated
It used large sizes of plate glass
It had a skeletal frame of iron
All of the above