Explain the difference between a biotype and a serotype.

When did paul zoll develop cardiac pacemaker

Why is the end of the cold war tied to the american domestic economy during this time?

What was zheng he’s most important accomplishment? zheng he spread chinese ideas and brought wealth to china from his travels. zheng he commanded an impressive fleet of ships. zheng he sailed the indian ocean and around africa. zheng he conquered lands as far away as africa to increase the dynasty’s power.