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The development of a three-field rotation system for planting crops[AA] increased the usage of land from one half in use each year under the old two-field system to two-thirds under the new system, with a consequent increase in production. The development of the heavy plough allowed heavier soils to be farmed more efficiently, aided by the spread of the horse collar, which led to the use of draught horses in place of oxen. Horses are faster than oxen and require less pasture, factors that aided the implementation of the three-field system.
What fraction of land was under cultivation using the two-field system?
A: one half

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Orthodox Christianity includes a large number of traditions regarding the Ever Virgin Mary, the Theotokos. The Orthodox believe that she was and remained a virgin before and after Christ's birth. The Theotokia (i.e., hymns to the Theotokos) are an essential part of the Divine Services in the Eastern Church and their positioning within the liturgical sequence effectively places the Theotokos in the most prominent place after Christ. Within the Orthodox tradition, the order of the saints begins with: The Theotokos, Angels, Prophets, Apostles, Fathers, Martyrs, etc. giving the Virgin Mary precedence over the angels. She is also proclaimed as the "Lady of the Angels".
What church did Mary give The Theotokia to?
A: unanswerable

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In conformation shows, also referred to as breed shows, a judge familiar with the specific dog breed evaluates individual purebred dogs for conformity with their established breed type as described in the breed standard. As the breed standard only deals with the externally observable qualities of the dog (such as appearance, movement, and temperament), separately tested qualities (such as ability or health) are not part of the judging in conformation shows.
What is the judge looking for in specific breeds?
A: conformity with their established breed

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There are very few existing mosaics from the Komnenian period but this paucity must be due to accidents of survival and gives a misleading impression. The only surviving 12th-century mosaic work in Constantinople is a panel in Hagia Sophia depicting Emperor John II and Empress Eirene with the Theotokos (112234). The empress with her long braided hair and rosy cheeks is especially capturing. It must be a lifelike portrayal because Eirene was really a redhead as her original Hungarian name, Piroska shows. The adjacent portrait of Emperor Alexios I Komnenos on a pier (from 1122) is similarly personal. The imperial mausoleum of the Komnenos dynasty, the Pantokrator Monastery was certainly decorated with great mosaics but these were later destroyed. The lack of Komnenian mosaics outside the capital is even more apparent. There is only a "Communion of the Apostles" in the apse of the cathedral of Serres.
Why are there so few surviving mosaics from the Komnenian period?
A:
accidents of survival