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 参考答案:A 答案解析:[试题分析] 此题为语义推理题。 [详细解答] 文章最后一段清楚阐明了只要不违背国际和平与安全的原则,"...the U.N.has no right to intervene in any s