Please write ___me and tell me ____yourself.

绿矾（FeSO₄•7H₂O）是治疗缺铁性贫血药品的重要成分．下面是以市售铁屑（含少量锡、氧化铁等杂质）为原料生产纯净绿矾的一种方法：

查询资料，得有关物质的数据如下表：

（1）检验制得的绿矾晶体中是否含有Fe³⁺，最好选用的试剂为____ ．

A．KSCN溶液     B．NaOH溶液    C．KMnO₄溶液     D．苯酚溶液

（2）操作II中，通入硫化氢至饱和的目的是____ ；在溶液中用硫酸酸化至pH=2的目的是____ ．

（3）操作IV的顺序依次为____ 、冷却结晶、____ ．

（4）操作IV得到的绿矾晶体用少量冰水洗涤，其目的是：①除去晶体表面附着的硫酸等杂质；②____ ．

（5）测定绿矾产品中Fe²⁺含量的方法是：a．称取2.850g绿矾产品，溶解，在250mL容量瓶中定容；b．量取25.00mL待测溶液于锥形瓶中；c．用硫酸酸化的0.01000mol/L KMnO₄溶液滴定至终点，消耗KMnO₄溶液体积的平均值为20.00mL．

①滴定时盛放KMnO₄溶液的仪器为____（填仪器名称）．

②判断此滴定实验达到终点的方法是____ ．

③计算上述样品中FeSO₄•7H₂O的质量分数为　____ ．

优秀传统文化凝聚着中华民族自强不息的精神追求和历久弥新的精神财富…..是建设中华民族共有精神家园的重要支撑….

已知反比例函数$y=\frac{k}{x}$的图象经过点（a，b），则它的图象也一定经过（　 ）

    Here are a few ways to motivate (激发) your children to do chores.

____ Children always watch their parents and learn how to act from them， so the parents must set a good example and take the chores seriously. This motivates children to do the chores， too.

____ For younger children， give them easy work， like putting away their toys. As the children get older， make them do more difficult chores.

____ Discuss the importance of doing chores and how they help the whole family. Knowing the importance of chores helps to motivate children to do them.

____ When children finish chores on the list， parents can reward (奖励) them by giving them a prize. A chore list also gives the children a sense of pride (自豪感) when they finish all of their chores.

____ Giving money for more chores can also work. But it is not the best way. You should make your children feel that doing chores is the work that they should do.

根据短文内容，从方框中为各段选择小标题。(其中有两个多余选项)

A. Make a list of the chores for your children

B. Tell your children about the importance of doing chores

C. Ask your children to do all kinds of chores

D. Set good examples in the family

E. Give your children some money to do more chores

F. Decide what kinds of chores your children do

G. Make your children happy with chores