单项选择题

Which of the following is the least possible reason for the launching of the Manhattan Project

A．FranklinD. Roosevelt.
B．Nazi Germany.
C．Albert Einstein and other scientists.
D．The Second World War.
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单项选择题
Which of the following did NOT cause so much trouble for the making of an atomic bomb.'
A．Extraction of uranium.
B．Sustentation of a reaction.
C．Conversion from uranium ore to uranium metal.
D．Separation of U-235 and U-238.
单项选择题
Education, reserved to the states or the people in file U. S., is a ______ of the state, not the federal government.
A．condition
B．performance
C．requirement
D．function
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