In a design with only two elements they would be almost identical or have nearly the same visual mass. If one element was replaced by a smaller one, it could throw the page out of ________.
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参考答案:
举一反三
【单选题】Economists make assumptions to
A.
provide issues for political discussion.
B.
make a complex world easier to understand.
C.
make it easier to teach economic concepts and analysis.