Answer:
Because Qin Shihuang unified seven states and made them into one big EMPIRE. Before his unification, each state had their own law, their own writing, measurement system, etc. To firm his empire, then there could be only ONE system.
Explanation:
To make one standard system, it has to begin with the common written language
What is best considered a statement of public interest
The public interest is "the welfare or well-being of the general public" and society
Astronomers have been trying to figure out how many galaxies there are in the cosmos for a long time. To get their estimate, they employ a technique known as "representative sampling." They count the number of galaxies in each sector by dividing the sky into equal-sized parts.
Orville and Wibur Wright's inventions contributed to developments in the aircraft industry.
