搜尋結果
Coronaviruses are a group of RNA viruses. [5] [6] They cause diseases in birds and mammals, including humans. These diseases can be mild, or they can be fatal. In humans and birds, they cause respiratory tract infections. Mild illnesses in humans include some cases of the common cold (which is also caused by other viruses, for example ...
Wikipedia is a free online encyclopedia website in 336 languages of the world. 324 languages are currently active and 13 are closed. People can freely use it, share it, and change it, without having to pay. It is also one of the biggest wiki organizations. People can choose to give money to the Wikimedia Foundation to fund Wikipedia and its ...
Number Scientific notation Grouping 6 000 000 000 000 000 6 × 10 15 6 quadrillion 765 476 250 000 000 7.6547625 × 10 14 765 trillion, 476 billion, 250 million 123 456 789 1.23456789 × 10 8 123 million, 456 thousand, 789 145 000 1.45 × 10 5 145 thousand
Saint Kitts and Nevis - Saint Lucia - Saint Vincent and the Grenadines - Samoa - San Marino - São Tomé and Príncipe - Saudi Arabia - Senegal - Serbia - Seychelles - Sierra Leone - Singapore - Slovakia - Slovenia - Solomon Islands - Somalia - South Africa - South Sudan - Spain - Sri Lanka - Sudan - Suriname - Sweden - Switzerland - Syria.
24-hour clock. The 24-hour clock is a way of telling the time in which the day runs from midnight to midnight and is divided into 24 hours, numbered from 0 to 23. It does not use a.m. or p.m. This system is also referred to (only in the United States and the English speaking parts of Canada) as military time [1] or (only in the United Kingdom ...
Presidency Portrait President Party Election Vice President 1 April 30, 1789 – March 4, 1797 George Washington Unaffiliated 1788–89 John Adams 1792 2 March 4, 1797 – March 4, 1801 John Adams Federalist 1796 Thomas Jefferson 3 March 4, 1801 – March 4
Brevicipitidae or rain frogs are a family of frog species. They live in eastern and southern Africa. As of 2020, scientists say there are 37 species in 5 genera in Brevicipitidae. [1] [2] Scientists used to think of Brevicipitidae as a subfamily in the family Microhylidae (narrow-mouth frogs). By studying phylogenetics, the scientists changed ...
