货币比率基本由市场供求决定，但各国中央银行对外汇市场也进行干预，以避免汇率剧烈波动的汇率制度是()
A、固定汇率制D
暂无解析
Ayearlater，withthenation’seconomy________，Bush’sapprovalratingdroppedbelow40percent
严复翻译的《天演论》，其原文的题目是（）
翻译：Itisnousetellinggrown-upchildrennottomakemistakes,bothbecausetheywillnotbelieveyou,andbecausemistakesareanessentialpartofeducation.
ThelongestriverinCanadais________.
Thestudentsarerequiredto________themainideasofthearticleintheirownwords.
