According to the passage, historians of women’s labor focused on factory work as a more promising area of research than service-sector work because factory work______
A. involved the payment of higher wages
B. required skill in detailed tasks
C. was assumed to be less characterized by sex segregation
D. was more readily accepted by women than by men
E. fitted the economic dynamic of industrialism better
It can be inferred from the passage that early historians of women’s labor in the United States paid little attention to women’s employment in the service sector of the economy because______
A. the extreme variety of these occupations made it very difficult to assemble meaningful statistics about them
B. fewer women found employment in the service sector than in factory work
C. the wages paid to workers in the service sector were much lower than those paid in the industrial sector
D. women’s employment in the service sector tended to be much more short-term than in factory work
E. employment in the service sector seemed to have much in common with the unpaid work associated with homemaking
体长约15-20em，黄白色，头及体上节纹间的刺细而尖的海马是
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