Come and see the India elephants and the new tigers from America. The bears are waiting to meet you, and the monkeys from China are waiting to throw（扔） things to you. The lovely dogs from Australia are waiting to laugh at you. The giraffes from Brazil are waiting to look down on you.
Tickets                             Open time
Grown-up:（成人）$2.00             9:00a.m—4:00p.m
Children :over 12 $1.00               Except（除）Friday
Under12 Free(免票)                  10:00a.m—3:00p.m
Keep the zoo clean!
Don't touch(触摸) , give good food or go near the animals!

英汉互译。

把一杯饱和ＮaCl溶液加热蒸发掉一些水分后，冷却至原来的温度，保持不变的是（　　）

若分式$\frac{3}{x-2}$有意义，则x的取值范围是（   ）