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问题 单项选择题

水分在植物体内沿导管向上运输的动力是______。
①蒸腾拉力②根压 ③ATP水解释放的能量 ④水分子间的内聚力 ⑤导管壁的内缩力

A．①②③
B．①③⑤
C．②④⑤
D．①②④

答案

参考答案：D

解析： 略

单项选择题

目前我国引起心房颤动最常见的病因是()

A．风湿性心脏病二尖瓣狭窄

B．甲状腺功能亢进症

C．急性心肌梗死

D．高血压心脏病

E．缩窄性心包炎
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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
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