确定消化性溃疡出血最可靠的方法是（）
A.胃液分析
B.钡餐透视
C.便隐血试验
D.急诊胃镜检查
E.询问病史
参考答案：D
一 Yao Ming had to give up the rest of the season because of his broken leg.
一 _____[ ]
A. He was so careless.
B. Never mind.
C. That's all right.
D. What a pity!
下列选项中，不属于模块间耦合的是
A) 数据耦合 B) 标记耦合 C) 异构耦合 D) 公共耦合
