搜尋結果
3 天前 · Wireless network technologies. In telecommunications, 5G is the fifth-generation technology standard for cellular networks, which cellular phone companies began deploying worldwide in 2019, and is the successor to 4G technology that provides connectivity to most current mobile phones. Like its predecessors, 5G networks are cellular networks, in ...
- July 2016; 7 years ago
- Telecommunications
5 天前 · Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive ...
- crystalline, reflective with bluish-tinged faces
- see Allotropes of silicon
3 天前 · Amazon.com, Inc.,[1] doing business as Amazon (/ˈæməzɒn/, AM-ə-zon; UK also /ˈæməzən/, AM-ə-zən), is an American multinational technology company, engaged in e-commerce, cloud computing, online advertising, digital streaming, and artificial intelligence.[5] It is considered one of the Big Five American technology companies; the ...
4 天前 · Ellen Lee DeGeneres ( / dəˈdʒɛnərəs / də-JEN-ər-əs; born January 26, 1958) [1] [2] is an American comedian, television host, actress, and writer. She starred in the sitcom Ellen from 1994 to 1998, which earned her a Primetime Emmy Award for "The Puppy Episode". She also hosted the syndicated television talk show, The Ellen DeGeneres ...
