Is this from vietnam if sao they were under heavy fire
Answer:
For a small minority of workers, the Second Industrial Revolution introduced white-collar jobs and growth in the middle class. Though it took very little skill to operate a machine, it took a lot of skill to design or fabricate a machine, and many foremen and managers were also needed to oversee production.
IM NOT SURE BUT I THINK SHE ASKING HOW TALL IS THE BBUILDING KNOWING THAT EACH FLOOR IS 1m AND SHE RECORDING THE TIME FROM EACH FLOOR THE BALL IS DROPPING SO SHES TRYING TO FIGURE OUT HOW TALL IS THE BUILDING
