What piece of technology could you not live without and why? What do you believe is the most important invention or innovation of all time?

Phone

Explanation:

I would say the phone you use it for work you use it for time you use it to call people pretty much everything that's thy I think it is important.

yes they have. but is this a true false question? if it is, the answer is true.

it should be a. song dynasty’s civil service examination system created an administrative bureaucracy manned by the landed aristocracy.