The current American school calendar was developed in the 19th century according to().
A.the growing season of nation's form
B.the labor demands of the industrial age
C.teachers' demands for more vacation time
D.parents' demands for other experiences for their kids
- · 有4位网友选择 A,占比40%
- · 有3位网友选择 C,占比30%
- · 有2位网友选择 B,占比20%
- · 有1位网友选择 D,占比10%