[问答题] 简述会展项目选择应坚持的原则。

A double suction centrifugal pump impeller has been installed in the reverse direction, and will （）. ["have a greater head capacity","operate with increased impeller efficiency","discharge through the suction side of the pump casing","require more power to run the shaft"] 机构客户不同于传统企业客户，主要体现在（）。 ["性质","特点","对银行所提供的服务的标准","以上均对"] PowerPoint 2003中，演示文稿的基本组成单元是（）。 ["文本","图形","超链点","幻灯片"] 二合一除油器（V-D03A/B）的入口污水最大含油量为（）。 ["500mg\/L","200mg\/L","300mg\/L","400mg\/L"] 雷管、导爆索、炸药销毁时通常采用烧毁法。 简述会展项目选择应坚持的原则。