The majority ethnic group in China today calls itself the “Han people.” Why do you think this is so?

Explanation: The Han people are the largest ethnic group in China, accounting for 91.6%. The name "Han" comes from the Han Dynasty, a short-lived successor to the Qin Dynasty that unified China. The Han dynasty was seen as the culmination of Chinese civilization, capable of extending its power and influence into Central and Northeast Asia and comparable to the Roman Empire in population and territory. earth.

answer; mechanics;

it might look like that the ideal way to research the health effects of trans fats is through a controlled experimental feeding trial. but these kinds of trial have several important limitations that the researcher must look into:

short in duration (this factor usually checks up on the intermediary risk factors rather than the actual outcomes of the disease)

limited dietary changes

only makes use of healthy participants