[多选题](不定项选择题)下列有关《中国科学技术史》著作的叙述正确的有(_____)。
A.《通史卷》是把整个科学技术发展的历史,按时代先后,分成若干阶段的“断代体”
B.《科学思想史卷》是在原始材料的基础上,根据当时的历史、文化背景,对每一历史时期的科学思想,做客观的叙述
C.《人物卷》选取了在中国科技史的各个时期起过重要作用,具有突出成就的科学家和技术发明家
D.《年表卷》以时间为序,以事件为主体,全面、系统地展示了几千年中国古代科学技术的发生和发展历程,是中国科学技术史的工具书
E.《建筑卷》是一部图文并茂、侧重于科技发展的建筑通史,作者广泛收集实物材料和文献史料,互相印证,力求把论断建立在实物与文献结合的基础上
F.《论著索引卷》是1900-1997年有关中国古代科学技术史研究的文献索引,分为中文和日文两部分

An exchange rate is the price of one country’s money in terms of some other country’s money. It is the relative price of one national currency expressed in terms of another national currency. Like the relative prices of goods, exchange rates can be expressed in one of two equivalent ways. For example, in June 1993, one U. S. dollar traded on the foreign exchange market for about six French francs. One U. S. dollar cost about six French francs to buy, or one U.S. dollar sold for about six French francs. This exchange rate is the relative price of the U.S. dollar in terms of French francs. Alternatively, it would be just as accurate to say that one French franc cost, or would buy, about 17 cents. This would be the relative price of the French franc in terms of the U. S. dollar.
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