问题 问答题 简答题

汽提塔有什么作用?

答案

参考答案:

汽提塔的目的是对侧线产品用直接蒸汽汽提或间接加热的办法,以除去侧线产品中的低沸点组分,使产品的闪点和馏程符合规定要求。

最常用的汽提方法是采用温度比侧线抽出温度高的水蒸汽进行直接汽提。汽提蒸汽的用量一般为产品量的2~4%(重)。汽提后的产品质量约比抽出温度低5~10℃。汽提塔顶的气体则返回到侧线抽出层的气相部位。

单项选择题
单项选择题

Egyptian wine has an extensive history within the history of Egyptian civilization. Grapes were not (1) to the landscape of Egypt, rather the vines themselves are (2) to have been imported from the Phoenicians, (3) the actual origins remain in (4) . What is known, is that (5) the third millennium BC, Egyptian kings of the first (6) had extensive wine cellars, and wine was used extensively in the temple ceremonies. The main (7) of wine in Egypt, took place between the king, nobles, and the priests in temple ceremonies, and is (8) by numerous painted relief’s, and other (9) evidence. The vineyards of ancient Egypt, were quite different from the modern methods of wine making today. (10) viticulture ( or wine making), ceased to (11) an exclusively ceremonial purpose, the Egyptians began to experiment with simple structures for their vines to train on, (12) found a way to train their vines so they were easy low (13) bushes, and found ways for the soil to (14) more moisture for the vines. Egyptian wine making experiments included the use of different wine presses, adding heat to the must ( the grape juice ready for fermentation) (15) make the wine sweet, and differences in vat types and materials. The (16) finished product of wine, was poured through a cloth filter, and then into earthenware jars, (17) they would be sealed with natural tar and left to (18) . The Egyptians kept accurate records of their vintages, and (19) of their wines, each jar of wine was clearly (20) with it’s own vintage, and quality.

9()

A.archeological

B.architectural

C.artistic

D.anthropological