应激的心理反应不包含以下哪个方面（） ["认识反应","情绪反应","行为反应","意识反应","防御反应"]
A virtual rise in the center of gravitty may be caused by（）. ["filling a partially tank","using an on board crane to life a freely swinging heavy object","emptying a partially filled tank","transferring ballast from the forepeak to the after peak"]
培训需求分析的作用表现在哪些方面？
人类行为的分类不包括（） ["反应行为","操作行为","个人行为","社会行为","应激行为"]
液压油的性质有（） ["粘性","密度","可压缩性","抗燃性"]
东磊以什么为名？
