Vấn đề dân tộc trong thời kỳ quá độ lên chủ nghĩa xã hội ở Việt Nam hiện nay

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.

How has our understanding of the first sentence of the declaration of independence changed over time?

This was an act of continental congress which initially organized the first united states territory and was to be the basis for governing how the united states would expand westward.