阅读短文，在家谱图中填上名字

     This is my family tree. My name is Jack. I’m English. I have a big family. My wife Allen is a teacher.

We have two children. Tom is my son. Linda is my daughter. They are students in No. 2 Middle

School. My father’s name is Jeff. My mother’s name is Grace. They are at home. Bill is my brother. He

is a worker. Lancy is my wife’s sister. She is a doctor. My wife’s mother’s name is Sue. Her father’s

name is Harry. They are old, too.

1._______ 2._______ 3._______ 4._______ 5._______ 6._______ 7._______

干筛法、水筛法的适用范围？