Several countries do not have formal diplomatic missions accredited to the United States. Consular duties for each country, except Kiribati and non-UN members, are instead managed by their respective diplomatic missions to the United Nations in New York.
does every country have an embassy in the us?
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Answer: no

The flags of Romania and Chad are identical aside from the blue strip on the left, which is slightly darker in the Chadian flag. Romania used the flag from 1866, while in that form appeared for the first time in Wallachia, being officially in use in 1848. Chad began to use its present flag in 1960, after it achieved independence from France. At that time, the Chad and Romanian flags were distinguishable by the latter's inclusion of the Coat of Arms of the Socialist Republic of Romania at the Romanian flag's centre. However, in 1989, the coat of arms was removed entirely after the revolution which overthrew Nicolae Ceausescu.
do chad and romania have the same flag?
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Answer: no

An artery (plural arteries) (from Greek (arteria), meaning 'windpipe, artery') is a blood vessel that takes blood away from the heart to all parts of the body (tissues, lungs, etc). Most arteries carry oxygenated blood; the two exceptions are the pulmonary and the umbilical arteries, which carry deoxygenated blood to the organs that oxygenate it. The effective arterial blood volume is that extracellular fluid which fills the arterial system.
does arteries carry blood away from the heart?
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Answer:
yes