第17题: [单项选择]疑有食管异物,在X线检查时,下列说法错误的是() A. 食管异物最易停留在食管的生理狭窄处 B. 透视可清晰显示如金属或骨类的不透X线异物影 C. 透X线的异物需要用钡棉检查,无挂棉现象即可排除异物 D. 食管异物可引起食管周围脓肿 E. 食管异物可引起大血管破裂导致大出血 参考答案:C
第24题: [单项选择]AIDS is a global problem that demands a unified, worldwide solution, which is not only the responsibility of nations in which AIDS is most ______. A. vigorous B. relevant C. prevalent D. rigorous 参考答案:C