男,44岁,间断性背部疼痛1月余,结合影像学检查,最可能的诊断是()
A.脊髓空洞症
B.L4/5椎间孔狭窄
C.脊膜瘤
D.强直性脊柱炎
E.脊柱结核
参考答案:B
呼吸性酸中毒应最先解决的问题是()
A.肺部感染,使用大量抗生素
B.进行人工呼吸
C.应用呼吸中枢兴奋剂
D.解除呼吸道梗阻,改善肺换气功能
E.给予碱性液体
Last week, Susan and David, ________our university's student association, met the Chinese guests
at the New York airport. [ ]
A. to represent
B. representing
C. represented
D. having represented