问题 多项选择题

进行调节系统和自动保护装置的调试试验前应具备()条件.

A.进行调节系统和自动保护装置的调整试验前,要求油系统油循环完毕,油质化验合格,油温保持在(50±5℃)

B.调节系统各油压表安装齐全,并经校验合格

C.主要压力表应更换为标准表,有关部件的行程指示标尺或百分表,以及试验时必须加装的临时设施,应按试验要求正确安装

D.电动高压油泵试运合格;各调节部套初步试验动作应平稳、灵活、无卡涩、或突然摆动

答案

参考答案:A, B, C, D

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