上消化道出血的呕血的颜色性状可见（）。
A.呈咖啡渣样
B.夹有食物残渣
C.棕褐色
D.鲜红色夹血块
E.夹有痰液，呈碱性
参考答案：A, B, C, D
In my dream I felt it hard to breath as if somebody ________ from the distance . [ ]
A. were choking
B. was choking me
C. had choked
D. would choke
做标准机的控制图应该由哪个部门负责完成？（）
A.工程部
B.行政部
C.生产部
