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1 天前 · Theria. Marsupialia. Placentalia. A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia ( / məˈmeɪli.ə / ). Mammals are characterized by the presence of milk -producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones.
2 天前 · Washington, officially the State of Washington, [3] is a state in the Pacific Northwest region of the United States. It is often referred to as Washington state [a] to distinguish it from the national capital, [4] both named for George Washington (the first U.S. president ). Washington borders the Pacific Ocean to the west, Oregon to the south ...
