对并联管路进行压力损失平衡计算，一般的通风系统要求两支管的压损差不超过（），除尘系统

在考试作图时，马虎同学画错了一个地方，他用橡皮轻轻一擦，没有擦干净，然后他用力大一些就擦干净了，这是通过________的方法来增大橡皮与纸之间的摩擦。

SQL支持集合的并运算，在Visual FoxPro中SQL并运算的运算符是（ ）。

A． PLUS

B． UNION

C． +

D． ∪

高利转贷罪的犯罪主体是特殊主体。

销售顾问在新车交付时的工作目标不包括（）

A.为客户把新车驾驶到客户指定的地点，如公司、家等地

B.为每一位客户创造富有东风悦达起亚特色的个性化交车体验，确保客户能够体验到拥有新车的兴奋和喜悦的感受，使之成为一种难忘的经历

C.确保交付车辆没有缺陷，文件齐全、配置完备、干净整洁

D.确保在交车过程中打消客户对车辆及服务的各种疑虑，加强其对东风悦达起亚汽车的信心，相信自己做出了正确的选择

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.

14（）

A.maintain

B.retain

C.contain

D.attain