[问答题,简答题] 科研经费使用原则有哪些？

周围血管征不包括（） ["毛细血管搏动","明显颈动脉搏动","奇脉","水冲脉","点头运动"] 额外心音大多出现在（） ["S₁之前、S₂之后","S₂之前、S₁之后","S₃之前、S₂之后","S₄之前、S₃之后","S₁之前、S₄之后"] 心尖区听诊最清晰的心音是（） ["第一心音","第二心音","第三心音","第四心音","第五心音"] 下列哪种情况常有震颤（） ["主动脉瓣关闭不全","肺动脉瓣关闭不全","动脉导管未闭","二尖瓣关闭不全","三尖瓣关闭不全"] 心脏触诊检查震颤，通用的正确手法是用（） ["全手掌","手掌尺侧","手掌桡侧","2～4指指腹","拇指指腹"] 科研经费使用原则有哪些？