在下列溶液中分别放入锌片，一段时间后把锌片取出，溶液质量减小的是 [ ]
A. 氯化钠
B. 硫酸亚铁溶液
C. 盐酸
D. 硝酸银溶液
答案：D
I always persuade Mary to have both feet on the____as she wants to marry a millionaire and accomplish her goals in an easy way.
A．ground
B．earth
C．location
D．place
四分法缩分样品，弃去相邻的两个扇形样品，留下另两个相邻的扇形样品。
