第11题: [单项选择]低氧血症伴高碳酸血症的慢性呼吸衰竭（） A. 高流量给氧 B. 高压氧舱给氧 C. 高流量通过50％乙醇湿化后给氧 D. 低流量，低浓度持续给氧 E. 低流量通过30％乙醇湿化后给氧 参考答案:D 答案解析:对二型呼吸衰竭病人应给予低浓度（25％～29％）、低流量（1～2L／min）鼻导管持续吸氧，以免缺氧纠正过快引起呼吸中枢抑制。
第17题: [单项选择]Life insurance is financial protection for dependents against loss ____________ the bread-winner’ s death. A. at the cost of B. on the verge of C. as a result of D. for the sake of 参考答案:C 答案解析:as a result of是“由于”。A．at the cost of是“以……为代价”；B．on the verge of是“接近于，濒于”；D．for the sake of是“为了……”。
第20题: [单项选择]Apparently there were ______ between police reports taken from the same witnesses at different times. A. distortions B. discrepancies C. disorders D. distractions 参考答案:B 答案解析:distortions扭曲，变形；discrepancies相差，差异；disorders混乱，无秩序状态；distractions分心，分心的事物。根据句子大意，应该选discrepancies。
