饭店投资的基础功能是（）。
A.经营收益
B.品牌提升
C.物业增值
D.集散社交
参考答案：A
_____ such a heavy loss, the businessman didn't have the courage to go on.[ ]
A. Having suffered
B. Suffering
C. To suffer
D. Suffered
上前臂骨折临时固定将肘关节弯曲成（）度，用三角巾吊挂在胸前。
A.70
B.80
C.90
