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苟性脆化产生的条件有哪些？供热锅炉防止苟性脆化的主要措施是什么？锅炉排污能否防止苟性脆化？

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The Romans were extremely intolerant of foreign religions。（)

Ptolemy’s geocentric theory remained very popular in Europe for centuries。（)

Among the Byzantine Empire, the Islamic Empire and the Frankish Empire, only the first one received continuing influence from the Roman intellectual and legal tradition。（)

All classes in universities were taught in Latin and mostly by a lecture method。（)