我国规定安全电压:交流有效值为50V,直流非脉动值为( )V。
A.48
B.80
C.100
D.120
参考答案:D
天地公司召开高新技术成果展示会,与会的客户、同行和媒体人数达一千多人,因人数大超出了公司的预计,出现了停车场拥堵和签到处混乱的现象,作为现场主管秘书,你应考虑()。
A、控制对媒体接待的数量
B、加派人员协助停车场管理人员疏导车辆
C、取消签到程序,让与会者直接入场
D、临时增设另一签到处
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.
7()
A.cost
B.expense
C.exhaustion
D.consumption