血清钠的正常参考值() ["115~125mmol\/L","125~135mmol\/L","135~145mmol\/L","145~155mmol\/L","155~165mmol\/L"]
测定强度上Rp0.2和RelRem的区别。
下列哪项不是阻塞性肺气肿的体征() ["桶状胸","语颤增强","过清音","呼气延长","听觉语音减弱"]
怎样选用金属低温夏比冲击试验的冷却介质与冷源?
鉴别肝火犯肺证与热邪壅肺证的主要依据是() ["发热恶寒","胸痛胸闷","大便秘结","急躁易怒","咳嗽咳血"]
做拉力试验时,试样断口总是在两边断,该现象造成的原因是什么?