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1 天前 · South Sudan (/ s uː ˈ d ɑː n,-ˈ d æ n /), officially the Republic of South Sudan, is a landlocked country in East Africa.It is bordered by Ethiopia, Sudan, the Central African Republic, the Democratic Republic of the Congo, Uganda, and Kenya, and includes the vast swamp region of the Sudd, formed by the White Nile and known locally as the Bahr al Jabal, meaning "Mountain Sea".
2 天前 · Katakana (片仮名、カタカナ, IPA: [katakaꜜna, kataꜜkana]) is a Japanese syllabary, one component of the Japanese writing system along with hiragana,[2] kanji and in some cases the Latin script (known as rōmaji). The word katakana means "fragmentary kana", as the katakana characters are derived from components or fragments of more ...
6 天前 · Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network)[1] including 1 billion people in more than 193 countries.[2][1][3] The official theme for 2024 is "Planet vs ...
3 天前 · Zendaya Maree Stoermer Coleman (/zənˈdeɪ.ə/ ⓘ zən-DAY-ə;[2] born September 1, 1996)[3][4] is an American actress and singer. She has received various accolades, including two Primetime Emmy Awards and a Golden Globe Award. Time magazine named her one of the 100 most influential people in the world in 2022. Born and raised in Oakland ...
4 天前 · The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to ...
6 天前 · Structure of a typical L-alpha-amino acid in the "neutral" form Amino acids are organic compounds that contain both amino and carboxylic acid functional groups.[1] Although over 500 amino acids exist in nature, by far the most important are the 22 α-amino acids incorporated into proteins.[2] Only these 22 appear in the genetic code of life.[3 ...
1 天前 · Maize / meɪz / ( Zea mays ), also known as corn in North American and Australian English, is a tall stout grass that produces cereal grain. It was domesticated by indigenous peoples in southern Mexico about 9,000 years ago from wild teosinte. Native Americans planted it alongside beans and squashes in the Three Sisters polyculture.
