What are these?what are these?what are these?what are these?what are these?what are these?

These are question marks or interrogation mark

Agriculture in Zhou Dynasty was very intensive and in many cases directed by the government. All farming lands were owned by nobles, who then gave their land to their serfs, similar to European feudalism. ... This way, the government was able to store surplus food and distribute them in times of famine or bad harvest.ReneTheophileHyacintheLa

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Explanation:

Rene Theophile Hyacinthe Laënnec (1781-1826) was a French physician who, in 1816, invented the stethoscope.

Using this new instrument, he investigated the sounds made by the heart and lungs and determined that his diagnoses were supported by the observations made during autopsies.

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the following best describes postwar era writers in their works:

many writers,authors,novelists,poets concentrated more on social art and social writing and stayed away from political writings.

the correct statement is letter a.   according to the mandate of heaven, kings were considered godlike beings, so they could do as they .

the mandate of heaven is a chinese political and religious ideology used since ancient times to justify the rule of the king or emperor of china, that has been in place since the zhou until the dynasty system ended. it has been created to justify the zhou as the main power of the region. in order to keep harmony, the ruler has to make what he wants and what people want. he had to make good choices to satisfy the people and then they will be happy and keep you in power.