单项选择题

A country's domestic policies ______.

A．can not be forcibly changed by the U. N.
B．are often investigated by the U. N.
C．are often enforced by the U. N.
D．are not allowed to benefit from U.N. advice or assistance

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单项选择题

The U.N. came into existence fully in ______.

A．1942
B．1944
C．1940
D．1945

单项选择题

The first stated aim of the U.N. was ______.

A．to supervise peace and treaties
B．to revise international laws
C．to prevent a third world war
D．to assist the "third world" countries