流体在直管内流动时，流体流动类型分哪几种？用什么指标区分？
京东商城的客服中心选址在江苏宿迁的理论解释是（） ["史密斯收益性空间界限分析","普雷德行为矩阵","点轴空间理论","中心外围理论"]
内曲线式油马达是（）油马达。 ["径向柱塞式；","轴向柱塞式；","斜盘式；","斜轴式。"]
某学生自幼就有出国留学的愿望，为此他特别认真地学习外语，他的学习动机属于（） ["内部动机","外部动机","一般动机","间接动机"]
In Ireland a prime minister is appointed by after nomination by（）. ["the Queen\/the president","the president\/the Queen","the Queen\/the House of Representatives","the president\/the House of Representative"]
简述管理哲学的特点。
