【单选题】Read each of the questions first, locate the relevant part of the text, and find the correct answer. Which of the following is the primary concern of the American women's movement today?
A.
The elimination of sexism in schools.
B.
The elimination of sexism in all forms of media.
C.
Women's rights in the worlds of politics and work and their position in the family.
【简答题】In a special differential transmission screw system, the basic lead of a part of srew is 4mm, the basic lead of the other part of screw is 5mm. When the screw rotate 8 rounds relative to the nut, the ...