单项选择题

The essential functions of the U. N. ______.

A．are limited to discussions and debates
B．include co-ordinating actions where necessary
C．are only concerned with human rights
D．are economic and culture

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单项选择题

The passage indicates that which of the following is the primary value of the University of Iowa hearing test

A．It will reduce misdiagnoses of hard-to-test patients.
B．It will lead to a cure for congenital deafness.
C．It will eventually make other means of testing hearing obsolete.
D．It will win Nobel Prize for outstanding achievement in the field of medicin

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