By which technique iron are made?
a) steam engine
b) salvay process
c) electrolyte
d) centrifugation
What is the main role of technologies?
a) increase production
b) decrease production
c) less effort
d) less money
Education and literacy gradually increase to…….worker.
a) train
b) prepare
c) dominate
d) discourage
What is the sudden need of education?
a) library
b) school
c) universities
d) all of these
Who increase the food supply?
a) industries
b) education
c) money
d) agriculture
Revolution
decrease the number of……
a) people
b) public
c) teachers
d) labor
