题目

蛋白质发生的下列过程中，可逆的是（    ） A. 加浓硫酸    B. 变性    C. 颜色反应    D. 盐析 答案：D  Not far from the club, there was a girden, ____ owner seated in it playing bridge with his children every afternoon. A. whose  B. its  C. which  D. that