A)Developed new medical practices
Answer:
False
Explanation:
Perestroika was a policy about restructuring the political and economic system.
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Each element has its unique properties, each contain a different number of protons and neutrons giving it its own atomic number and mass number
Explanation:
silver is (uncountable) a lustrous white metallic element, atomic number 47, atomic mass 10787 symbol ag while iron is (uncountable) a common. inexpensive metal often black in colour that rusts is attracted by magnets and used in making steel
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After the Civil War, Southern state legislatures attempted to restrict the rights of formerly enslaved persons by "passing Black Codes" which segregated blacks from whites.
