第9题: [单项选择]Excessive alkalinity of the water in an auxiliary boiler can cause (). A. caustic embrittlement of the boiler metal B. acidic corrosion of the boiler metal C. hard scale deposits on the boiler tubes D. etching of the heat exchange surfaces 参考答案:A
第34题:[单选题]一脊髓损伤患者出现下肢痉挛明显,关于痉挛的益处和弊端,以下错误的是 A. 由于阵挛、髋内收剪刀样和屈肌痉挛而损害站立平衡 B. 因为痉挛可以促进骨质增生,所以能减少骨折和异位骨化的危险性 C. 痉挛可充当静脉肌肉泵,降低发生深静脉血栓的危险 D. 借助伸肌痉挛等可帮助患者站立和行走 参考答案:B